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Leung CK, Bernal JDK, Yu AP, Recchia F, Tam BT, Fong DYT, Chan DKC, Ngai HH, Lee CH, Yung PSH, Wong SHS, Gibala M, Siu PM. Effects of volume-matched once-weekly and thrice-weekly high-intensity interval training (HIIT) on body adiposity in adults with central obesity: Study protocol for a randomized controlled trial. J Exerc Sci Fit 2024; 22:329-340. [PMID: 38993983 PMCID: PMC11238123 DOI: 10.1016/j.jesf.2024.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 05/06/2024] [Accepted: 05/29/2024] [Indexed: 07/13/2024] Open
Abstract
Objective This study aims to examine the comparative effects of 75 min of volume-matched once-weekly and thrice-weekly high-intensity interval training (HIIT) on body adiposity in adults with central obesity. Methods This assessor-blinded, three-arm, randomized controlled trial will recruit 315 physically inactive adults with central obesity (aged ≥18 years, body mass index ≥23, waist circumference ≥90 cm for men and ≥80 cm for women). Participants will be randomly allocated to the once-weekly HIIT, thrice-weekly HIIT or usual care control group. Participants in the HIIT groups will receive weekly exercise training sessions for 16 weeks, prescribed either once or three times weekly. Each HIIT session will consist of a supervised program of four 4-min high-intensity intervals at 85%-95% peak heart rate (HRpeak) interspersed with 3-min active recovery intervals at 50%-70% HRpeak. Participants in the once-weekly HIIT group will perform the 25-min HIIT bout three times with a break between each 25-min HIIT bout. The usual care control group will receive bi-weekly health education classes. The outcome assessments will be conducted at baseline, 16 weeks (post-intervention) and 32 weeks (follow-up). The primary outcome will be total body adiposity assessed by dual-energy X-ray absorptiometry (DXA). The secondary outcome measures will include markers of cardiovascular and metabolic health (body composition, cardiorespiratory fitness, blood pressure, and blood lipids), mental health, cognitive performance, health-related quality of life, sleep quality, habitual physical activity, diet, medication, adverse events and adherence to the intervention. Impact of the project The findings from this study are expected to consolidate the therapeutic efficacy of HIIT for the management of central obesity and inform the comparative compliance, feasibility and suitability of once-weekly and thrice-weekly HIIT as exercise strategies to manage obesity. In particular, the present study is expected to provide a novel perspective on the utility of low-frequency HIIT (i.e., once-weekly) as an effective and sustainable exercise strategy to tackle the obesity pandemic. The anticipated findings will hold substantial translational value by informing public health policies and enhancing exercise compliance in the physically inactive obese population. Trial registration ClinicalTrials.gov (NCT04887454).
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Affiliation(s)
- Chit K Leung
- Division of Kinesiology, School of Public Health, The University of Hong Kong, Hong Kong, China
| | - Joshua D K Bernal
- Division of Kinesiology, School of Public Health, The University of Hong Kong, Hong Kong, China
| | - Angus P Yu
- Division of Kinesiology, School of Public Health, The University of Hong Kong, Hong Kong, China
| | - Francesco Recchia
- Division of Kinesiology, School of Public Health, The University of Hong Kong, Hong Kong, China
| | - Bjorn T Tam
- Department of Sport, Physical Education and Health, Faculty of Social Sciences, Hong Kong Baptist University, Hong Kong, China
- Dr. Stephen Hui Research Centre for Physical Recreation and Wellness, Faculty of Social Sciences, Hong Kong Baptist University, Hong Kong, China
| | - Daniel Y T Fong
- School of Nursing, The University of Hong Kong, Hong Kong, China
| | - Derwin K C Chan
- Department of Early Childhood Education, The Education University of Hong Kong, Hong Kong, China
| | - Heidi H Ngai
- Dietetic Clinic, School of Professional and Continuing Education, The University of Hong Kong, Hong Kong, China
| | - Chi H Lee
- Department of Medicine, School of Clinical Medicine, The University of Hong Kong, Hong Kong, China
| | - Patrick S H Yung
- Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Hong Kong, China
| | - Stephen H S Wong
- Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Hong Kong, China
| | - Martin Gibala
- Department of Kinesiology, McMaster University, Canada
| | - Parco M Siu
- Division of Kinesiology, School of Public Health, The University of Hong Kong, Hong Kong, China
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Mielke GI, Ding D, Keating SE, Nunes BP, Brady R, Brown WJ. Physical activity volume, frequency, and intensity: Associations with hypertension and obesity over 21 years in Australian women. JOURNAL OF SPORT AND HEALTH SCIENCE 2024; 13:631-641. [PMID: 38735532 PMCID: PMC11282338 DOI: 10.1016/j.jshs.2024.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 04/04/2024] [Accepted: 04/11/2024] [Indexed: 05/14/2024]
Abstract
BACKGROUND Optimal patterns of accrual of recommended levels of physical activity (PA) for prevention of hypertension and obesity are not known. The overall aim of this study was to investigate whether different patterns of accumulation of PA are differentially associated with hypertension and obesity in Australian women over 21 years. Specifically, we investigated whether, for the same weekly volume of PA, the number of sessions (frequency) and vigorousness of PA (intensity) were associated with a reduction in the occurrence of hypertension and obesity in women. METHODS Data from the 1973-1978 and 1946-1951 cohorts of the Australian Longitudinal Study on Women's Health were analyzed (n = 20,588; 12%-16% with a Bachelor's or higher degree). Self-reported PA, hypertension, height, and weight were collected using mail surveys every 3 years from 1998/2000 to 2019/2021. Generalized Estimating Equation models with a 3-year lag model were used to investigate the association of PA volume (metabolic equivalent min/week) (none; 33-499; 500-999; ≥1000, weekly frequency (none; 1-2 times; 3-4 times; 5-7 times; ≥8 times), and the proportion of vigorous PA to total volume of PA (none; 0%; 1%-33%; 34%-66%; 67%-100%) with odds of hypertension and obesity from 2000 to 2021. RESULTS The cumulative incidence of hypertension was 6% in the 1973-1978 and 23% in the 1946-1951 cohort; 27% of women in the 1973-1978; and 15% in the 1946-1951 cohort developed obesity over the period. Overall, a higher volume of PA was associated with reduced odds of hypertension and obesity. When the volume of PA was considered, the odds of hypertension did not vary according to the frequency or intensity of PA. However, increased proportion of vigorous PA to the total volume of PA was associated with a small additional reduction in the risk of obesity. CONCLUSION PA volume appears to be more important than the pattern of accumulation for the prevention of hypertension and obesity. Incorporating more sessions, particularly of vigorous-intensity PA, may provide extra benefits for the prevention of obesity.
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Affiliation(s)
- Gregore I Mielke
- School of Public Health, The University of Queensland, Brisbane, QLD 4006, Australia.
| | - Ding Ding
- Sydney School of Public Health, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia; The Charles Perkins Centre, The University of Sydney, Sydney, NSW 2006, Australia
| | - Shelley E Keating
- School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Bruno P Nunes
- School of Nursing, Federal University of Pelotas, Pelotas, Rio Grande do Sul 96010-610, Brazil
| | - Ruth Brady
- School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Wendy J Brown
- School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, QLD 4072, Australia; Faculty of Health Sciences and Medicine, Bond University, Gold Coast, QLD 4226, Australia
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Oliveira A, Fidalgo A, Farinatti P, Monteiro W. Effects of high-intensity interval and continuous moderate aerobic training on fitness and health markers of older adults: A systematic review and meta-analysis. Arch Gerontol Geriatr 2024; 124:105451. [PMID: 38718488 DOI: 10.1016/j.archger.2024.105451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 03/30/2024] [Accepted: 04/19/2024] [Indexed: 06/17/2024]
Abstract
BACKGROUND High-intensity interval training (HIIT) promotes similar or superior gains in physical fitness and health compared to continuous moderate-intensity training (MICT) in young individuals. However, the effectiveness of HIIT in older adults is uncertain. OBJECTIVE This meta-analysis compared the effects of HIIT and MICT on cardiorespiratory fitness, body composition, vascular, metabolic, and hormonal variables, cognitive function, and quality of life in older adults. METHODS PubMed, Embase, Cochrane, Web of Science, Scopus, and SportDiscus databases were searched from inception until December 2023. Trials included adults ≥ 60 y. Hedge's effect sizes (g) were calculated and study quality and features of training interventions were tested as moderators. RESULTS Twenty-nine trials including 1,227 subjects (65.4 ± 3.3 y). HIIT and MICT elicited significant (p < 0.021) and similar (p > 0.156) 'gs' for VO2max (0.722 vs. 0.490), maximal workload/peak power output ratio (0.290 vs. 0.372),% fat (-0.297 vs. -0.262), glycemia (-0.273 vs. -0.334), systolic (-0.465 vs. -0.341), and diastolic blood pressure (-0.566 vs. -2.311). HIIT (p < 0.04) but not MICT (p > 0.170) produced significant 'gs' for fat mass (-0.245 vs. -0.103), waist circumference (-0.239 vs. -0.116), testosterone (0.339 vs. 0.170), and complex Stroop test (-0.595 vs. -0.250). Increases in the VO2max occurred only in controlled trials after HIIT but not MICT (Q = 6.286, p = 0.012; HITT-g = 1.068, p < 0.0001 vs. MICT-g = 0.109, p= 0.596). CONCLUSION HIIT and MICT produced similar changes in most of the investigated variables. In trials with greater quality (controlled vs. non-controlled trials), cardiorespiratory gains were higher in HIIT vs. MICT. These findings suggest that HIIT might be suitable for improving fitness and health in older adults.
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Affiliation(s)
- Adriano Oliveira
- Laboratory of Physical Activity and Health Promotion (LABSAU), Graduate Program in Exercise Science and Sports, Institute of Physical Education and Sports, University of Rio de Janeiro State. Rua São Francisco Xavier, 524, sala 8121F, Maracanã, Rio de Janeiro, RJ, CEP 20550-900, Brazil; Graduate Program in Physical Activity Sciences, Salgado de Oliveira University, Bloco A, Rua Marechal Deodoro, 217, bloco A, Centro, Niteroi, RJ, CEP 24030-060, Brazil
| | - Andressa Fidalgo
- Laboratory of Physical Activity and Health Promotion (LABSAU), Graduate Program in Exercise Science and Sports, Institute of Physical Education and Sports, University of Rio de Janeiro State. Rua São Francisco Xavier, 524, sala 8121F, Maracanã, Rio de Janeiro, RJ, CEP 20550-900, Brazil
| | - Paulo Farinatti
- Laboratory of Physical Activity and Health Promotion (LABSAU), Graduate Program in Exercise Science and Sports, Institute of Physical Education and Sports, University of Rio de Janeiro State. Rua São Francisco Xavier, 524, sala 8121F, Maracanã, Rio de Janeiro, RJ, CEP 20550-900, Brazil
| | - Walace Monteiro
- Laboratory of Physical Activity and Health Promotion (LABSAU), Graduate Program in Exercise Science and Sports, Institute of Physical Education and Sports, University of Rio de Janeiro State. Rua São Francisco Xavier, 524, sala 8121F, Maracanã, Rio de Janeiro, RJ, CEP 20550-900, Brazil; Graduate Program in Physical Activity Sciences, Salgado de Oliveira University, Bloco A, Rua Marechal Deodoro, 217, bloco A, Centro, Niteroi, RJ, CEP 24030-060, Brazil.
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Song X, Cui X, Su W, Shang X, Tao M, Wang J, Liu C, Sun Y, Yun H. Comparative effects of high-intensity interval training and moderate-intensity continuous training on weight and metabolic health in college students with obesity. Sci Rep 2024; 14:16558. [PMID: 39019997 PMCID: PMC11255215 DOI: 10.1038/s41598-024-67331-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Accepted: 07/10/2024] [Indexed: 07/19/2024] Open
Abstract
The purpose of this study was to compare the effects of High-Intensity Interval Training (HIIT) and Moderate-Intensity Continuous Training (MICT) on weight, body composition, blood lipid indicators, and metabolic status in college students living with obesity. The study focused on a sample of 40 college students living with obesity, including 20 males and 20 females, aged between 18 and 25. Participants were randomly assigned to either the HIIT group or the MICT group. Both groups underwent an 8-week intervention, consisting of three sessions per week with alternate-day training. The MICT group's training consisted of continuous aerobic exercise for 35 min at 60-70% of maximum heart rate. The HIIT group engaged in 28 min of alternating high-intensity and low-intensity exercise, where the high-intensity phase was at 85-90% of maximum heart rate for 4 min, followed by a 3-min recovery period at 50-60% of maximum heart rate, repeated four times. Both groups underwent heart rate monitoring before and after the training sessions to ensure the accuracy of the training intensity. Within each group, further distinctions were made based on gender, resulting in the following subgroups: Male HIIT group (n = 10), Female HIIT group (n = 10), Male MICT group (n = 10), and Female MICT group (n = 10). Differences in anthropometric and biochemical indicators among the groups were analyzed, and the different effects of the two intervention strategies on the obese college student population were comprehensively evaluated. Compared to the baseline assessment, the HIIT group showed a more favorable declining trend than the MICT group in terms of body morphology and body composition, particularly in the aspect of body fat percentage (BF%). The male HIIT group, female HIIT group, male MICT group, and female MICT group respectively reduced by - 23.71%, - 26.76%, - 9.81%, - 7.16%. Male and female HIIT group experienced a more pronounced decrease compared to the MICT group, with the female HIIT group reducing an additional 3.75% more than the male HIIT group. Regarding intergroup differences, BF% significant differences were shown between male MICT group and the HIIT group (P < 0.05), and female MICT group and the HIIT group (P < 0.01). In terms of biochemical indicators, the HIIT group also presented a more favorable declining trend compared to the MICT group, with male HIIT participants showing more reduction than female HIIT participants, especially in total cholesterol (TC) (10.64%), low-density lipoprotein cholesterol (LDL-C) (11.73%), alanine aminotransferase (ALT) (11.99%), and uric acid (UA) (11.76%). Regarding triglycerides (TG), significant intergroup differences were observed between male MICT and HIIT groups (P < 0.01) and female MICT and HIIT groups (P < 0.01). Concerning ALT, a significant difference was shown between female MICT and HIIT groups (P < 0.01), while no significant difference was observed among male participants. Overall, for college students living with obesity, both HIIT and MICT have shown positive effects. Among these, HIIT demonstrates greater effectiveness compared to MICT in BF% and biochemical markers.
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Affiliation(s)
- Xu Song
- School of Physical Education, Zhejiang Guangsha Vocational and Technical University of Construction, Dongyang, China
- College of Sports Science, Qufu Normal University, Qufu, China
| | - Xianyou Cui
- School of Physical Education, Zhejiang Guangsha Vocational and Technical University of Construction, Dongyang, China
- Moscow State Academy of Physical Education, Moscow, Russia
| | - Wenbo Su
- Department of Sports Teaching and Research, Lanzhou University, Lanzhou, China
| | - Xueyan Shang
- School of Physical Education, Zhejiang Guangsha Vocational and Technical University of Construction, Dongyang, China
| | - Meng Tao
- School of Exercise and Health, Shanghai University of Sport, Shanghai, China
| | - Jing Wang
- School of Physical Education, Zhejiang Guangsha Vocational and Technical University of Construction, Dongyang, China
| | - Chang Liu
- School of Sport Science, Beijing Sport University, Beijing, China.
| | - Yaowei Sun
- Yufeng Experimental School, Kunshan, China.
- School of Sport Science, Beijing Sport University, Beijing, China.
| | - Hezhang Yun
- School of Physical Education, Zhejiang Guangsha Vocational and Technical University of Construction, Dongyang, China.
- School of Sport Science, Beijing Sport University, Beijing, China.
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Luo H, Zhao DY, Li J. Impact of a 12-wk physical conditioning program on the aerobic capacity of aviation cadets. World J Clin Cases 2024; 12:4239-4246. [PMID: 39015925 PMCID: PMC11235569 DOI: 10.12998/wjcc.v12.i20.4239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 05/18/2024] [Accepted: 05/29/2024] [Indexed: 06/30/2024] Open
Abstract
BACKGROUND Flight cadets need to have good physical fitness to cope with the challenges of flying missions. The continuous development of science and technology has led to the constant upgrading of fighter jets and the improvement of their performance, which has resulted in new and higher requirements for the physical fitness of flight personnel. The traditional physical training mode, method, and assessment have been used for many years and do not meet current fitness needs. AIM To investigate the impact of a 12-wk comprehensive anti-G fitness training program on the aerobic capacity of aviation cadets and to evaluate its effectiveness. METHODS Fifty-five cadets were randomly assigned to control and experimental groups using a randomized, single-blind design. The control group maintained their existing training regimen, while the experimental group participated in a 12-wk comprehensive training intervention. The training program comprised strength training twice per week, high-intensity interval training three times per week, and supplemental nutritional and psychological support. Maximal oxygen uptake (VO2max), lower limb strength, and hemoglobin levels were measured at baseline, at 6 wk and 12 wk post-intervention. RESULTS Repeated measures analysis of variance revealed significant differences of both VO2max and relative VO2 in both groups across time points (P < 0.05). However, no significant time-group interaction was observed (P > 0.05). Paired t-tests comparing baseline and 12-wk results showed that VO2max and relative VO2 were significantly higher in the experimental group than the control group (P < 0.05). This suggests that the training program effectively enhanced the aerobic capacity of the experimental group. Key indicators of aerobic capacity, bilateral lower limb strength and hemoglobin levels, were also significantly different over time and between groups (P < 0.05). No significant differences were noted in heart-rate metrics (P > 0.05). CONCLUSION A 12-wk comprehensive anti-G fitness training program significantly improved the aerobic capacity of aviation cadets, thereby enhancing their overall capacity and laying a physiological foundation for enduring high-G flights.
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Affiliation(s)
- Hao Luo
- School of Sports and Human Sciences, Beijing Sport University, Beijing 100084, China
- School of Physical Education, Shanxi University, Taiyuan 030006, Shanxi Province, China
| | - Ding-Yu Zhao
- School of Physical Education, Shanxi University, Taiyuan 030006, Shanxi Province, China
| | - Juan Li
- College of Physical Education and Health, Guangxi Minzu University, Nanning 530006, Guangxi Zhuang Autonomous Region, China
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Poon ETC, Li HY, Little JP, Wong SHS, Ho RST. Efficacy of Interval Training in Improving Body Composition and Adiposity in Apparently Healthy Adults: An Umbrella Review with Meta-Analysis. Sports Med 2024:10.1007/s40279-024-02070-9. [PMID: 39003682 DOI: 10.1007/s40279-024-02070-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/17/2024] [Indexed: 07/15/2024]
Abstract
BACKGROUND Although the efficacy of interval training for improving body composition has been summarized in an increasing number of systematic reviews in recent years, discrepancies in review findings and conclusions have been observed. OBJECTIVE This study aims to synthesize the available evidence on the efficacy of interval training compared with moderate-intensity continuous training (MICT) and nonexercise control (CON) in reducing body adiposity in apparently healthy adults. METHODS An umbrella review with meta-analysis was performed. A systematic search was conducted in seven databases (MEDLINE, EMBASE, Cochrane Database, CINAHL, Scopus, SPORTDiscus, and Web of Science) up to October 2023. Systematic reviews with meta-analyses of randomized controlled trials (RCTs) comparing interval training and MICT/CON were included. Literature selection, data extraction, and methodological quality assessment (AMSTAR-2) were conducted independently by two reviewers. Meta-analyses were performed using a random-effects model. Subgroup analyses were conducted based on the type of interval training [high-intensity interval training (HIIT) and sprint interval training (SIT)], intervention duration, body mass index, exercise modality, and volume of HIIT protocols. RESULTS Sixteen systematic reviews, including 79 RCTs and 2474 unique participants, met the inclusion criteria. Most systematic reviews had a critically low (n = 6) or low (n = 6) AMSTAR-2 score. Interval training demonstrated significantly greater reductions in total body fat percent (BF%) compared with MICT [weighted mean difference (WMD) of - 0.77%; 95% confidence interval (CI) - 1.12 to - 0.32%] and CON (WMD of - 1.50%; 95% CI - 2.40 to - 0.58%). Significant reductions in fat mass, visceral adipose tissue, subcutaneous abdominal fat, and android abdominal fat were also observed following interval training compared to CON. Subgroup analyses indicated that both HIIT and SIT resulted in superior BF% loss than MICT. These benefits appeared to be more prominent in individuals with overweight/obesity and longer duration interventions (≥ 12 weeks), as well as in protocols using cycling as a modality and low-volume HIIT (i.e., < 15 min of high-intensity exercise per session). CONCLUSIONS This novel umbrella review with large-scale meta-analysis provides an updated synthesis of evidence with implications for physical activity guideline recommendations. The findings support interval training as a viable exercise strategy for reducing adiposity in the general population.
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Affiliation(s)
- Eric Tsz-Chun Poon
- Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Hong-Yat Li
- Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Jonathan Peter Little
- School of Health and Exercise Sciences, University of British Columbia, Kelowna, BC, Canada
| | - Stephen Heung-Sang Wong
- Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Robin Sze-Tak Ho
- Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Shatin, Hong Kong.
- Physical Education Unit, The Chinese University of Hong Kong, Shatin, Hong Kong.
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Cebrick-Grossman JA, Fetherman DL. A Worksite Intervention Program for Obese Sedentary Women Using Wearable Technology. Workplace Health Saf 2024; 72:298-306. [PMID: 38842071 DOI: 10.1177/21650799241254402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
BACKGROUND The sedentary aspects of work have been associated with increased health risks. The purpose of this study was to compare the effects of high intensity interval training (HIIT) and increased steps on anthropometric, body mass, and body composition changes over a 12-week period. METHODS 12 sedentary, obese, body mass index (BMI) = 32.98 ± 3.21 kg/m2, adult (46.10 ± 9.56 years), females volunteered for the study and were randomly assigned into one of the two groups, the HIIT group and the STEP group. During the 12-week study, all participants' movements were monitored during their workday, via an accelerometer, a Movband™, 5 days/week. FINDINGS The HIIT group (n = 5) engaged in structured exercise (~15.0 ± 3.5 minutes), defined as total body moves which consisted of eight different routines: upper and lower extremity, two cardio segments, two total body, yoga, and abdominal exercises. The STEP group (n = 7) averaged ~7,000 steps/day throughout 12 weeks. Pre- and post-program measurements included: five anthropometric measurements (biceps, waist, abdomen, hips, and thigh), along with body mass and body composition measures: relative (%) body fat via dual x-ray absorptiometry (DEXA) scan, fat mass, fat-free mass, and lean mass. CONCLUSIONS Statistical significance was determined among participants for biceps, hips, and thigh measurements along with body mass and body composition changes for improved health. APPLICATION TO PRACTICE This work is suggestive that a physical activity intervention integrated into the workplace via work processes and/or structured exercise is supportive in reducing anthropometric and body composition measurements, while changing body mass, to increase health and reduce obesity-related chronic disease risks in sedentary women.
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Li BM, Qiu DY, Ni PS, Wang ZZ, Duan R, Yang L, Liu CY, Chen BY, Li FH. Can pre-exercise photobiomodulation improve muscle endurance and promote recovery from muscle strength and injuries in people with different activity levels? A meta-analysis of randomized controlled trials. Lasers Med Sci 2024; 39:132. [PMID: 38758297 DOI: 10.1007/s10103-024-04079-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 05/12/2024] [Indexed: 05/18/2024]
Abstract
Photobiomodulation therapy (PBMT) was introduced as an ergogenic aid for sport performance in healthy individuals is still controversial. The main aim of this study is to assess the potential enhancements in muscle endurance and recovery from muscle strength and injuries mediated by PBMT among individuals exhibiting diverse activity levels. Randomized controlled trials (RCT) of PBMT interventions for healthy people (both trained and untrained individuals) exercising were searched (up to January 16, 2024) in four electronic databases: Web of Science, PubMed, Scopus and Embase. Primary outcome measures included muscle endurance, muscle strength and creatine kinase (CK) levels; secondary outcome measure included Lactate dehydrogenase (LDH) levels. Subgroup analyses based on physical activity levels were conducted for each outcome measure. Thirty-four RCTs were included based on the article inclusion and exclusion criteria. Statistical results showed that PBMT significantly improved muscle endurance (standardized mean difference [SMD] = 0.31, 95%CI 0.11, 0.51, p < 0.01), indicating a moderate effect size. It also facilitated the recovery of muscle strength (SMD = 0.24, 95%CI 0.10, 0.39, p < 0.01) and CK (mean difference [MD] = -77.56, 95%CI -112.67, -42.44, p < 0.01), indicating moderate and large effect sizes, respectively. Furthermore, pre-application of PBMT significantly improved muscle endurance, recovery of muscle strength and injuries in physically inactive individuals and athletes (p < 0.05), while there was no significant benefit for physically active individuals. Pre-application of PBMT improves muscle endurance and promotes recovery from muscle strength and injury (includes CK and LDH) in athletes and sedentary populations, indicating moderate to large effect sizes, but is ineffective in physically active populations. This may be due to the fact that physically active people engage in more resistance training, which leads to a decrease in the proportion of red muscle fibres, thus affecting photobiomodulation.
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Affiliation(s)
- Bo-Ming Li
- School of Sport Sciences, Nanjing Normal University, No.1 Wenyuan Road Qixia District, Nanjing, 210046, China
| | - Da-Yong Qiu
- School of Physical and Health Education, Nanjing Normal University Taizhou College, Taizhou, China
| | - Pin-Shi Ni
- School of Sport Sciences, Nanjing Normal University, No.1 Wenyuan Road Qixia District, Nanjing, 210046, China
| | - Zhuang-Zhi Wang
- School of Sport Sciences, Nanjing Normal University, No.1 Wenyuan Road Qixia District, Nanjing, 210046, China
| | - Rui Duan
- School of Physical Education and Sports Science, South China Normal University, Guangzhou, China
| | - Luodan Yang
- School of Physical Education and Sports Science, South China Normal University, Guangzhou, China
| | - Cheng-Yi Liu
- School of Physical Education and Sports Science, South China Normal University, Guangzhou, China
| | - Bao-Yi Chen
- Qixia Sports Hospital Affiliated to Nanjing Normal University, Nanjing, China
| | - Fang-Hui Li
- School of Sport Sciences, Nanjing Normal University, No.1 Wenyuan Road Qixia District, Nanjing, 210046, China.
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Couvert A, Goumy L, Maillard F, Esbrat A, Lanchais K, Saugrain C, Verdier C, Doré E, Chevarin C, Adjtoutah D, Morel C, Pereira B, Martin V, Lancha AH, Barnich N, Chassaing B, Rance M, Boisseau N. Effects of a Cycling versus Running HIIT Program on Fat Mass Loss and Gut Microbiota Composition in Men with Overweight/Obesity. Med Sci Sports Exerc 2024; 56:839-850. [PMID: 38233990 DOI: 10.1249/mss.0000000000003376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
PURPOSE High-intensity interval training (HIIT) can efficiently decrease total and (intra-)abdominal fat mass (FM); however, the effects of running versus cycling HIIT programs on FM reduction have not been compared yet. In addition, the link between HIIT-induced FM reduction and gut microbiota must be better investigated. The aim of this study was to compare the effects of two 12-wk HIIT isoenergetic programs (cycling vs running) on body composition and fecal microbiota composition in nondieting men with overweight or obesity. METHODS Sixteen men (age, 54.2 ± 9.6 yr; body mass index, 29.9 ± 2.3 kg·m -2 ) were randomly assigned to the HIIT-BIKE (10 × 45 s at 80%-85% of maximal heart rate, 90-s active recovery) or HIIT-RUN (9 × 45 s at 80%-85% of maximal heart rate, 90-s active recovery) group (3 times per week). Dual-energy x-ray absorptiometry was used to determine body composition. Preintervention and postintervention fecal microbiota composition was analyzed by 16S rRNA gene sequencing, and diet was controlled. RESULTS Overall, body weight, and abdominal and visceral FM decreased over time ( P < 0.05). No difference was observed for weight, total body FM, and visceral FM between groups (% change). Conversely, abdominal FM loss was greater in the HIIT-RUN group (-16.1% vs -8.3%; P = 0.050). The α-diversity of gut microbiota did not vary between baseline and intervention end and between groups, but was associated with abdominal FM change ( r = -0.6; P = 0.02). The baseline microbiota profile and composition changes were correlated with total and abdominal/visceral FM losses. CONCLUSIONS Both cycling and running isoenergetic HIIT programs improved body composition in men with overweight/obesity. Baseline intestinal microbiota composition and its postintervention variations were correlated with FM reduction, strengthening the possible link between these parameters. The mechanisms underlying the greater abdominal FM loss in the HIIT-RUN group require additional investigations.
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Affiliation(s)
| | - Leslie Goumy
- Laboratoire des Adaptations Métaboliques à l'Exercice en conditions Physiologiques et Pathologiques (AME2P), Université Clermont Auvergne, Clermont-Ferrand, FRANCE
| | - Florie Maillard
- Laboratoire des Adaptations Métaboliques à l'Exercice en conditions Physiologiques et Pathologiques (AME2P), Université Clermont Auvergne, Clermont-Ferrand, FRANCE
| | - Alexandre Esbrat
- Laboratoire des Adaptations Métaboliques à l'Exercice en conditions Physiologiques et Pathologiques (AME2P), Université Clermont Auvergne, Clermont-Ferrand, FRANCE
| | - Kassandra Lanchais
- Laboratoire des Adaptations Métaboliques à l'Exercice en conditions Physiologiques et Pathologiques (AME2P), Université Clermont Auvergne, Clermont-Ferrand, FRANCE
| | - Célia Saugrain
- Laboratoire des Adaptations Métaboliques à l'Exercice en conditions Physiologiques et Pathologiques (AME2P), Université Clermont Auvergne, Clermont-Ferrand, FRANCE
| | - Charlotte Verdier
- Laboratoire des Adaptations Métaboliques à l'Exercice en conditions Physiologiques et Pathologiques (AME2P), Université Clermont Auvergne, Clermont-Ferrand, FRANCE
| | | | - Caroline Chevarin
- Microbes, Intestin, Inflammation et Susceptibilité de l'Hôte (M2iSH), UMR 1071 Inserm, USC-INRAE 1382, Université Clermont Auvergne, Clermont-Ferrand, FRANCE
| | | | - Claire Morel
- Center of Resources, Expertise and Performance in Sports (CREPS), Bellerive-sur-Allier, FRANCE
| | - Bruno Pereira
- CIC INSERM 1405/Plateforme d'Investigation Clinique CHU Gabriel Montpied, 58 Rue Montalembert, CEDEX 1, Clermont-Ferrand, FRANCE
| | | | - Antonio H Lancha
- Laboratory of Applied Nutrition and Metabolism, School of Physical Education and Sport, University of São Paulo, São Paulo, BRAZIL
| | - Nicolas Barnich
- Microbes, Intestin, Inflammation et Susceptibilité de l'Hôte (M2iSH), UMR 1071 Inserm, USC-INRAE 1382, Université Clermont Auvergne, Clermont-Ferrand, FRANCE
| | - Benoît Chassaing
- Inserm U1016, Team "Mucosal microbiota in chronic inflammatory diseases," CNRS UMR 8104, Université de Paris, Paris, FRANCE
| | - Mélanie Rance
- Center of Resources, Expertise and Performance in Sports (CREPS), Bellerive-sur-Allier, FRANCE
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10
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Poon ETC, Li HY, Gibala MJ, Wong SHS, Ho RST. High-intensity interval training and cardiorespiratory fitness in adults: An umbrella review of systematic reviews and meta-analyses. Scand J Med Sci Sports 2024; 34:e14652. [PMID: 38760916 DOI: 10.1111/sms.14652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Revised: 05/02/2024] [Accepted: 05/03/2024] [Indexed: 05/20/2024]
Abstract
BACKGROUND High-intensity interval training (HIIT) is characterized by repeated bouts of relatively intense exercise interspersed with recovery periods. Previous studies have evaluated this exercise strategy with various population subgroups, regimens, and comparator groups, limiting the generalizability of findings. We performed a novel umbrella review to generate an up-to-date synthesis of the available evidence regarding the effect of HIIT on cardiorespiratory fitness (CRF) in adults as compared to non-exercise control and traditional continuous forms of exercise such as moderate-intensity continuous training (MICT). METHODS An umbrella review was conducted in accordance with the Preferred Reporting Items for Overviews of Reviews guideline. Seven databases (MEDLINE, EMBASE, Cochrane Database, CINAHL, Scopus, SPORTDiscus, and Web of Science) were searched until February 2024. Systematic reviews with meta-analyses comparing HIIT and active/non-active control conditions were included. Literature search, data extraction, and methodological quality assessment (AMSTAR-2) were conducted independently by two reviewers. RESULTS Twenty-four systematic reviews with meta-analyses, representing 429 primary studies and 12 967 unique participants, met the inclusion criteria. Most of the systematic reviews received moderate-to-critically low AMSTAR-2 scores. The data showed that HIIT, including the particularly intense variant "sprint interval training" (SIT), significantly increases CRF in adults compared to non-exercise control (standardized mean difference [SMD]: 0.28 to 4.31; weighted mean difference [WMD]: 3.25 to 5.5 mL/kg/min) and MICT (SMD: 0.18 to 0.99; WMD: 0.52 to 3.76 mL/kg/min). This effect was consistently observed across specific groups of individuals (e.g., apparently healthy adults, individuals with overweight/obesity, older adults, and high-level athletes) and HIIT modalities (e.g., low-volume HIIT, whole-body HIIT, home-based HIIT, aquatic HIIT, and short SIT). CONCLUSION Existing evidence from systematic reviews consistently supports the effect of HIIT on enhancing CRF in adults when compared to non-exercise control and MICT. Our findings offer a comprehensive basis that may potentially contribute to informing physical activity guidelines aimed at improving CRF in the general population.
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Affiliation(s)
- Eric Tsz-Chun Poon
- Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Hong-Yat Li
- Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Martin J Gibala
- Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada
| | - Stephen Heung-Sang Wong
- Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Robin Sze-Tak Ho
- Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Shatin, Hong Kong
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11
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D'Alleva M, Giovanelli N, Graniero F, Billat VL, Fiori F, Marinoni M, Parpinel M, Lazzer S. Effects of 24-week Polarized Training vs. Threshold Training in Obese Male Adults. Int J Sports Med 2024; 45:282-291. [PMID: 37402392 DOI: 10.1055/a-2123-0851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/06/2023]
Abstract
The combination of high volume of moderate-intensity continuous training with a low volume of high-intensity interval training improved body composition and physical capacities in individuals with obesity. However, polarized training (POL) has never been used in adult men with obesity. Thus, the purpose of this study was to investigate changes in body composition and physical capacities induced by a 24-week POL or threshold (THR) program in obese male adults. Twenty male patients (mean age 39.8±6.3 yrs; mean body mass index [BMI] 31.6±2.7 kg∙m-2) participated in this study (n: 10 POL, n: 10 THR). After 24-week, body mass (BM) and fat mass (FM) decreased by -3.20±3.10 kg (P<0.05) and -3.80±2.80 kg (P<0.05), respectively, similarly in both groups. Maximal oxygen uptake ( ̇VO2max) and ̇VO2 at respiratory compensation point (RCP) increased in the POL group (+8.5±12.2 and+9.0±17.0%, P<0.05) and in the THR group (+4.24±8.64 and+4.0±6.70%, P<0.05), as well ̇VO2 at gas exchange threshold (GET) increased similarly in both groups (+12.8±12.0%, P<0.05). POL and THR were equally effective in improving body composition and physical capacities in obese subjects. Future studies are needed to determine whether adherence to the training program can be improved by adding a running competition compared with a group without competition at the end of the training program.
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Affiliation(s)
- Mattia D'Alleva
- Deparment of Medicine, University of Udine, Udine, Italy
- School of Sport Sciences, University of Udine, Udine, Italy
| | - Nicola Giovanelli
- Deparment of Medicine, University of Udine, Udine, Italy
- School of Sport Sciences, University of Udine, Udine, Italy
| | - Francesco Graniero
- Physical Exercise Prescription Center, Azienda sanitaria universitaria Friuli Centrale, Gemona del Friuli, Italy
| | | | - Federica Fiori
- Deparment of Medicine, University of Udine, Udine, Italy
| | | | - Maria Parpinel
- Deparment of Medicine, University of Udine, Udine, Italy
| | - Stefano Lazzer
- Deparment of Medicine, University of Udine, Udine, Italy
- School of Sport Sciences, University of Udine, Udine, Italy
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12
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McCarthy SF, Jarosz C, Ferguson EJ, Kenno KA, Hazell TJ. Intense interval exercise induces greater changes in post-exercise metabolism compared to submaximal exercise in middle-aged adults. Eur J Appl Physiol 2024; 124:1075-1084. [PMID: 37819613 DOI: 10.1007/s00421-023-05334-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 09/21/2023] [Indexed: 10/13/2023]
Abstract
INTRODUCTION High-intensity interval training (HIIT) and sprint interval training (SIT) consistently elevate post-exercise metabolism compared to moderate-intensity continuous training (MICT) in young adults (18-25 years), however few studies have investigated this in middle-aged adults. PURPOSE To assess the effect of exercise intensity on post-exercise metabolism following submaximal, near-maximal, and supramaximal exercise protocols in middle-aged adults. METHODS 12 participants (8 females; age: 44 ± 10 years; V ˙ O2max: 35.73 ± 9.97 mL·kg-1 min-1) had their oxygen consumption ( V ˙ O2) measured during and for 2 h following 4 experimental sessions: (1) no-exercise control (CTRL); (2) MICT exercise (30 min at 65% V ˙ O2max); (3) HIIT exercise (10 × 1 min at 90% maximum heart rate with 1 min rest); and (4) modified-SIT exercise (8 × 15 s "all-out" efforts with 2 min rest). Between session differences for V ˙ O2 and fat oxidation were compared. RESULTS O2 consumed post-exercise was elevated during the 1st h and 2nd h following HIIT (15.9 ± 2.6, 14.7 ± 2.3 L; P < 0.036, d > 0.98) and modified-SIT exercise (16.9 ± 3.3, 15.30 ± 3.4 L; P < 0.041, d > 0.96) compared to CTRL (13.3 ± 1.9, 12.0 ± 2.5 L) while modified-SIT was also elevated vs HIIT in the 1st h (P < 0.041, d > 0.96). Total post-exercise O2 consumption was elevated following all exercise sessions (MICT: 27.7 ± 4.1, HIIT: 30.6 ± 4.8, SIT: 32.2 ± 6.6 L; P < 0.027, d > 1.03) compared to CTRL (24.9 ± 4.1 L). Modified-SIT exercise increased fat oxidation (0.103 ± 0.019 g min-1) compared to all sessions post-exercise (CTRL: 0.059 ± 0.025, MICT: 0.075 ± 0.022, HIIT: 0.081 ± 0.021 g·min-1; P < 0.007, d > 1.30) and HIIT exercise increased compared to CTRL (P = 0.046, d = 0.87). CONCLUSION Exercise intensity has an important effect on post-exercise metabolism in middle-aged adults.
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Affiliation(s)
- Seth F McCarthy
- Department of Kinesiology and Physical Education, Wilfrid Laurier University, 75 University Ave W, Waterloo, ON, N2L3C5, Canada
| | - Claudia Jarosz
- Department of Kinesiology and Physical Education, Wilfrid Laurier University, 75 University Ave W, Waterloo, ON, N2L3C5, Canada
| | - Emily J Ferguson
- Department of Kinesiology and Physical Education, Wilfrid Laurier University, 75 University Ave W, Waterloo, ON, N2L3C5, Canada
- School of Kinesiology and Health Studies, Queen's University, Kingston, ON, Canada
| | - Kenji A Kenno
- Faculty of Human Kinetics, University of Windsor, Windsor, ON, Canada
| | - Tom J Hazell
- Department of Kinesiology and Physical Education, Wilfrid Laurier University, 75 University Ave W, Waterloo, ON, N2L3C5, Canada.
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13
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Liang W, Liu C, Yan X, Hou Y, Yang G, Dai J, Wang S. The impact of sprint interval training versus moderate intensity continuous training on blood pressure and cardiorespiratory health in adults: a systematic review and meta-analysis. PeerJ 2024; 12:e17064. [PMID: 38495758 PMCID: PMC10944631 DOI: 10.7717/peerj.17064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 02/15/2024] [Indexed: 03/19/2024] Open
Abstract
Background Although aerobic exercise is the primary modality recommended for the treatment of hypertension, it remains unclear whether high-intensity all-out sprint interval training (SIT) can result in greater reductions of blood pressure (BP) and cardiorespiratory health. This systematic review aims to compare the impact of SIT versus Moderate-intensity continuous training (MICT) on improvements in resting systolic blood pressure (SBP), diastolic blood pressure (DBP) and maximal oxygen uptake (VO2 max) among adults. Methods We conducted a systematic search of three online databases (PubMed, Embase, and Web of Science) from January 2000 to July 2023 to identify randomized controlled trials that compared the chronic effects of SIT versus MICT on BP in participants with high or normal blood pressure. We extracted information on participant characteristics, exercise protocols, BP outcomes, and intervention settings. Furthermore, the changes in VO2 max between the two groups were analyzed using a meta-analysis. The pooled results were presented as weighted means with 95% confidence intervals (CI). Results Out of the 1,874 studies initially were found, eight were included in this review, totaling 169 participants. A significant decrease in SBP (MD = -2.82 mmHg, 95% CI [-4.53 to -1.10], p = 0.08, I2 =45%) was observed in the SIT group compared to before the training, but no significant decrease in DBP (MD = -0.75 mmHg, 95% CI [-1.92 to 0.42], p = 0.16, I2 = 33%) was observed. In contrast, both SBP (MD = -3.00 mmHg, 95% CI [-5.31 to -0.69], p = 0.68, I2 = 0%) and DBP (MD = -2.11 mmHg, 95% CI [-3.63 to -0.60], p = 0.72, I2 = 0%) significantly decreased in the MICT group with low heterogeneity. No significant difference was found in resting SBP and DBP between SIT and MICT after the intervention. Both SIT and MICT significantly increased VO2 peak, with SIT resulting in a mean difference (MD) of 1.75 mL/kg/min (95% CI [0.39-3.10], p = 0.02, I2 = 61%), and MICT resulting in a mean difference of 3.10 mL/kg/min (95% CI [1.03-5.18], p = 0.007, I2 = 69%). MICT was more effective in improving VO2 peak (MD = -1.36 mL/kg/min, 95% CI [-2.31 to 0.40], p = 0.56, I2 = 0%). Subgroup analysis of duration and single sprint time showed that SIT was more effective in reducing SBP when the duration was ≥8 weeks or when the sprint time was <30 s. Conclusion Our meta-analysis showed that SIT is an effective intervention in reducing BP and improving cardiorespiratory fitness among adults. Consequently, SIT can be used in combination with traditional MICT to increase the variety, utility, and time efficiency of exercise prescriptions for different populations.
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Affiliation(s)
- Weibao Liang
- School of Physical Education and Sports Science, South China Normal University, Guangzhou, Guangdong, China
| | - Chuannan Liu
- School of Physical Education and Sports Science, South China Normal University, Guangzhou, Guangdong, China
| | - Xujie Yan
- School of Physical Education and Sports Science, South China Normal University, Guangzhou, Guangdong, China
| | - Yu Hou
- Department of Physical Education, Kunsan National University, Gunsan, South Korea
| | - Guan Yang
- School of Physical Education, South China University of Technology, Guangzhou, Guangdong, China
| | - Jianmin Dai
- College of Sports Science, Kyungnam University, Changwon, South Korea
| | - Songtao Wang
- School of Physical Education and Sports Science, South China Normal University, Guangzhou, Guangdong, China
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14
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Yin M, Li H, Bai M, Liu H, Chen Z, Deng J, Deng S, Meng C, Vollaard NBJ, Little JP, Li Y. Is low-volume high-intensity interval training a time-efficient strategy to improve cardiometabolic health and body composition? A meta-analysis. Appl Physiol Nutr Metab 2024; 49:273-292. [PMID: 37939367 DOI: 10.1139/apnm-2023-0329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
The present meta-analysis aimed to assess the effects of low-volume high-intensity interval training (LV-HIIT; i.e., ≤5 min high-intensity exercise within a ≤15 min session) on cardiometabolic health and body composition. A systematic search was performed in accordance with PRISMA guidelines to assess the effect of LV-HIIT on cardiometabolic health and body composition. Twenty-one studies (moderate to high quality) with a total of 849 participants were included in this meta-analysis. LV-HIIT increased cardiorespiratory fitness (CRF, SMD = 1.19 [0.87, 1.50]) while lowering systolic blood pressure (SMD = -1.44 [-1.68, -1.20]), diastolic blood pressure (SMD = -1.51 [-1.75, -1.27]), mean arterial pressure (SMD = -1.55 [-1.80, -1.30]), MetS z-score (SMD = -0.76 [-1.02, -0.49]), fat mass (kg) (SMD = -0.22 [-0.44, 0.00]), fat mass (%) (SMD = -0.22 [-0.41, -0.02]), and waist circumference (SMD = -0.53 [-0.75, -0.31]) compared to untrained control (CONTROL). Despite a total time-commitment of LV-HIIT of only 14%-47% and 45%-94% compared to moderate-intensity continuous training and HV-HIIT, respectively, there were no statistically significant differences observed for any outcomes in comparisons between LV-HIIT and moderate-intensity continuous training (MICT) or high-volume HIIT. Significant inverse dose-responses were observed between the change in CRF with LV-HIIT and sprint repetitions (β = -0.52 [-0.76, -0.28]), high-intensity duration (β = -0.21 [-0.39, -0.02]), and total duration (β = -0.19 [-0.36, -0.02]), while higher intensity significantly improved CRF gains. LV-HIIT can improve cardiometabolic health and body composition and represent a time-efficient alternative to MICT and HV-HIIT. Performing LV-HIIT at a higher intensity drives higher CRF gains. More repetitions, longer time at high intensity, and total session duration did not augment gains in CRF.
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Affiliation(s)
- Mingyue Yin
- School of Athletic Performance, Shanghai University of Sport, Shanghai, China
| | - Hansen Li
- Department of Physical Education, Southwest University, Chongqing, China
| | - Mingyang Bai
- School of Physical Education, Sichuan Agriculture University, Yaan, China
| | - Hengxian Liu
- School of Athletic Performance, Shanghai University of Sport, Shanghai, China
| | - Zhili Chen
- School of Athletic Performance, Shanghai University of Sport, Shanghai, China
| | - Jianfeng Deng
- School of Athletic Performance, Shanghai University of Sport, Shanghai, China
| | - Shengji Deng
- School of Athletic Performance, Shanghai University of Sport, Shanghai, China
| | - Chuan Meng
- School of Athletic Performance, Shanghai University of Sport, Shanghai, China
| | - Niels B J Vollaard
- Faculty of Health Sciences and Sport, University of Stirling, Stirling, UK
| | - Jonathan P Little
- School of Health and Exercise Sciences, University of British Columbia, Okanagan Campus, Kelowna, Canada
| | - Yongming Li
- School of Athletic Performance, Shanghai University of Sport, Shanghai, China
- China Institute of Sport Science, Beijing, China
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15
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Wang Y, Fan C, Cheng L, Wang Y, Peng D, Li F, Han Y, Wang H. A comparative analysis of energy expenditure and substrate metabolism in male university students with overweight/obesity: Tabata vs HIIT and MICT. Front Endocrinol (Lausanne) 2024; 15:1323093. [PMID: 38476670 PMCID: PMC10927983 DOI: 10.3389/fendo.2024.1323093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 02/08/2024] [Indexed: 03/14/2024] Open
Abstract
Introduction Exploring the energy expenditure and substrate metabolism data during exercise, 10-minute recovery, and 20-minute recovery phases in Tabata, HIIT(High-Intensity Interval Training), and MICT(Moderate-Intensity Continuous Training). This study explores the scientific aspects of weight reduction strategies, examining energy expenditure and substrate metabolism from various training perspectives. The aim is to establish a theoretical foundation for tailoring targeted exercise plans for individuals within the population with overweight/obesity. Methods This study used an experimental design with fifteen male university students with overweight/obesity. Participants underwent random testing with Tabata, HIIT, and MICT. Tabata involved eight sets of 20 seconds exercise and 10 seconds rest, totaling 4 minutes. HIIT included four sets of power cycling: 3 minutes at 80% VO2max intensity followed by 2 minutes at 20% VO2max. MICT comprised 30 minutes of exercise at 50% VO2max intensity. Gas metabolism indices were continuously measured. Subsequently, fat and glucose oxidation rates, along with energy expenditure, were calculated for each exercise type. Results During both the exercise and recovery phases, the Tabata group exhibited a significantly higher fat oxidation rate of (0.27 ± 0.03 g/min) compared to the HIIT group (0.20 ± 0.04 g/min, p<0.05) and the MICT group (0.20 ± 0.03g/min, p<0.001). No significant difference was observed between the HIIT and MICT groups (p=0.854). In terms of energy expenditure rate, the Tabata group maintained a substantially elevated level at 5.76 ± 0.74kcal/min compared to the HIIT group (4.81 ± 0.25kcal/min, p<0.01) and the MICT group (3.45 ± 0.25kcal/min, p<0.001). Additionally, the energy expenditure rate of the HIIT group surpassed that of the MICT group significantly (p<0.001). Conclusion The study finds that male college students with overweight/obesity in both exercise and recovery, Tabata group has lower fat and glucose oxidation rates, and energy expenditure compared to HIIT and MICT groups. However, over the entire process, Tabata still exhibits significantly higher rates in these aspects than HIIT and MICT. Despite a shorter exercise duration, Tabata shows a noticeable "time-efficiency" advantage. Tabata can be used as an efficient short-term weight loss exercise program for male college students with overweight/obesity.
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Affiliation(s)
- Yongbo Wang
- College of Physical Education and Health, Guangxi Normal University, Guilin, China
| | - Changming Fan
- Department of Physical Education, Hebei University of Environmental Engineering, Qinhuangdao, China
| | - Lin Cheng
- College of Physical Education and Health, Guangxi Normal University, Guilin, China
| | - Yifei Wang
- College of Physical Education and Health, Guangxi Normal University, Guilin, China
| | - Danxing Peng
- College of Physical Education and Health, Guangxi Normal University, Guilin, China
| | - Fengcai Li
- College of Physical Education and Health, Guangxi Normal University, Guilin, China
| | - Yanbai Han
- College of Physical Education and Health, Guangxi Normal University, Guilin, China
| | - Hongli Wang
- College of Physical Education and Health, Guangxi Normal University, Guilin, China
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Keating SE, Sabag A, Hallsworth K, Hickman IJ, Macdonald GA, Stine JG, George J, Johnson NA. Exercise in the Management of Metabolic-Associated Fatty Liver Disease (MAFLD) in Adults: A Position Statement from Exercise and Sport Science Australia. Sports Med 2023; 53:2347-2371. [PMID: 37695493 PMCID: PMC10687186 DOI: 10.1007/s40279-023-01918-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/18/2023] [Indexed: 09/12/2023]
Abstract
Metabolic-associated fatty liver disease (MAFLD) is the most prevalent chronic liver disease worldwide, affecting 25% of people globally and up to 80% of people with obesity. MAFLD is characterised by fat accumulation in the liver (hepatic steatosis) with varying degrees of inflammation and fibrosis. MAFLD is strongly linked with cardiometabolic disease and lifestyle-related cancers, in addition to heightened liver-related morbidity and mortality. This position statement examines evidence for exercise in the management of MAFLD and describes the role of the exercise professional in the context of the multi-disciplinary care team. The purpose of these guidelines is to equip the exercise professional with a broad understanding of the pathophysiological underpinnings of MAFLD, how it is diagnosed and managed in clinical practice, and to provide evidence- and consensus-based recommendations for exercise therapy in MAFLD management. The majority of research evidence indicates that 150-240 min per week of at least moderate-intensity aerobic exercise can reduce hepatic steatosis by ~ 2-4% (absolute reduction), but as little as 135 min/week has been shown to be effective. While emerging evidence shows that high-intensity interval training (HIIT) approaches may provide comparable benefit on hepatic steatosis, there does not appear to be an intensity-dependent benefit, as long as the recommended exercise volume is achieved. This dose of exercise is likely to also reduce central adiposity, increase cardiorespiratory fitness and improve cardiometabolic health, irrespective of weight loss. Resistance training should be considered in addition to, and not instead of, aerobic exercise targets. The information in this statement is relevant and appropriate for people living with the condition historically termed non-alcoholic fatty liver disease (NAFLD), regardless of terminology.
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Affiliation(s)
- Shelley E Keating
- School of Human Movement and Nutrition Sciences, The University of Queensland, Room 534, Bd 26B, St Lucia, Brisbane, QLD, 4067, Australia.
| | - Angelo Sabag
- Faculty of Medicine and Health, Discipline of Exercise and Sport Science, University of Sydney, Sydney, NSW, Australia
- Charles Perkins Centre, University of Sydney, Camperdown, NSW, Australia
- NICM Health Research Institute, Western Sydney University, Westmead, NSW, Australia
| | - Kate Hallsworth
- NIHR Newcastle Biomedical Research Centre, Newcastle Upon Tyne Hospitals NHS Foundation Trust, Newcastle Upon Tyne, UK
- Liver Unit, Newcastle Upon Tyne Hospitals NHS Foundation Trust, Newcastle Upon Tyne, UK
- Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle Upon Tyne, UK
| | - Ingrid J Hickman
- Department of Nutrition and Dietetics, Princess Alexandra Hospital, Brisbane, QLD, Australia
- Faculty of Medicine, PA-Southside Clinical Unit, The University of Queensland, Brisbane, QLD, Australia
| | - Graeme A Macdonald
- Faculty of Medicine, PA-Southside Clinical Unit, The University of Queensland, Brisbane, QLD, Australia
- Department of Gastroenterology and Hepatology, Princess Alexandra Hospital, Brisbane, QLD, Australia
| | - Jonathan G Stine
- Division of Gastroenterology and Hepatology, Department of Medicine, The Pennsylvania State University- Milton S. Hershey Medical Center, Hershey, PA, USA
- Department of Public Health Sciences, The Pennsylvania State University- College of Medicine, Hershey, PA, USA
- Liver Center, The Pennsylvania State University- Milton S. Hershey Medical Center, Hershey, PA, USA
- Cancer Institute, The Pennsylvania State University- Milton S. Hershey Medical Center, Hershey, PA, USA
| | - Jacob George
- Storr Liver Centre, The Westmead Institute for Medical Research and Westmead Hospital, University of Sydney, Sydney, NSW, Australia
| | - Nathan A Johnson
- Faculty of Medicine and Health, Discipline of Exercise and Sport Science, University of Sydney, Sydney, NSW, Australia
- Charles Perkins Centre, University of Sydney, Camperdown, NSW, Australia
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17
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Duarte LF, Gasparini-Neto VH, Neves LNS, Nunes LB, Leite RD, de Sousa NMF, Carletti L. A Cardiopulmonary Exercise Testing for Prescribing High-Intensity Interval Training Sessions with Elastic Resistance. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:7097. [PMID: 38063527 PMCID: PMC10706320 DOI: 10.3390/ijerph20237097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 11/15/2023] [Accepted: 11/18/2023] [Indexed: 12/18/2023]
Abstract
This study aims to analyze the agreement of cardiopulmonary variables between a cardiopulmonary exercise test with elastic resistance (CPxEL) and high-intensity interval exercise with elastic resistance (EL-HIIE). METHODS Twenty-two physically independent participants were recruited. Visit one consisted of conducting a health survey and anthropometric assessment. On visit two, the participants performed CPxEL. After seven days, on visit three, the participants performed EL-HIIE. The CPxEL was carried out on a rubber mat demarcated by lines representing eight stages. The test consisted of alternating back and forth steps against elastic resistance. The increments were performed at a rate of one stage per minute, following a cadence controlled by a metronome calibrated by beats per minute (bpm). The EL-HIIE was performed at the stage corresponding to an intensity of ~85% VO2max, as determined by CPxEL. The EL-HIIE consisted of 10 × 1 min (work):1 min (passive rest), with a cadence of 200 bpm. Cardiopulmonary parameters, heart rate (HR), and oxygen consumption (VO2) were measured during exercise. Bland-Altman was applied to analyze the agreement between the HR and VO2 found in EL-HIIE and the values prescribed by CPxEL (~85-90% VO2max). RESULTS The HRpeak and VO2peak in the EL-HIIE showed good agreement with the VO2CPxEL and HRCPxEL values, showing an average difference of (-1.7 mL·kg-1·min-1) and (0.3 bpm). CONCLUSIONS The results of the present study demonstrate the agreement of cardiopulmonary variables between the CPxEL and the EL-HIIE. Therefore, for a more specific prescription of EL-HIIE intensity, CPxEL can be used.
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Affiliation(s)
- Lorena Flores Duarte
- Laboratory of Exercise Physiology (LAFEX), Physical Education and Sports Center, Federal University of Espírito Santo (CEFD-UFES), Vitória 29075-910, ES, Brazil; (V.H.G.-N.); (L.N.S.N.); (L.B.N.); (R.D.L.); (L.C.)
| | - Victor Hugo Gasparini-Neto
- Laboratory of Exercise Physiology (LAFEX), Physical Education and Sports Center, Federal University of Espírito Santo (CEFD-UFES), Vitória 29075-910, ES, Brazil; (V.H.G.-N.); (L.N.S.N.); (L.B.N.); (R.D.L.); (L.C.)
| | - Letícia Nascimento Santos Neves
- Laboratory of Exercise Physiology (LAFEX), Physical Education and Sports Center, Federal University of Espírito Santo (CEFD-UFES), Vitória 29075-910, ES, Brazil; (V.H.G.-N.); (L.N.S.N.); (L.B.N.); (R.D.L.); (L.C.)
| | - Lenice Brum Nunes
- Laboratory of Exercise Physiology (LAFEX), Physical Education and Sports Center, Federal University of Espírito Santo (CEFD-UFES), Vitória 29075-910, ES, Brazil; (V.H.G.-N.); (L.N.S.N.); (L.B.N.); (R.D.L.); (L.C.)
| | - Richard Diego Leite
- Laboratory of Exercise Physiology (LAFEX), Physical Education and Sports Center, Federal University of Espírito Santo (CEFD-UFES), Vitória 29075-910, ES, Brazil; (V.H.G.-N.); (L.N.S.N.); (L.B.N.); (R.D.L.); (L.C.)
| | - Nuno Manoel Frade de Sousa
- Center for Research in Sport and Physical Activity (CIDAF), Faculty of Sport Sciences and Physical Education, University of Coimbra (FCDEF-UC), 3040-256 Coimbra, Portugal;
| | - Luciana Carletti
- Laboratory of Exercise Physiology (LAFEX), Physical Education and Sports Center, Federal University of Espírito Santo (CEFD-UFES), Vitória 29075-910, ES, Brazil; (V.H.G.-N.); (L.N.S.N.); (L.B.N.); (R.D.L.); (L.C.)
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18
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Findikoglu G, Altinkapak A, Yaylali GF. Is isoenergetic high-intensity interval exercise superior to moderate-intensity continuous exercise for cardiometabolic risk factors in individuals with type 2 diabetes mellitus? A single-blinded randomized controlled study. Eur J Sport Sci 2023; 23:2086-2097. [PMID: 36622777 DOI: 10.1080/17461391.2023.2167238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The aim of this study was to compare the effect of high-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) with equal energy expenditure on glycaemic and cardiometabolic risk factors in people with Type 2 Diabetes Mellitus (T2DM) when compared to the control. Sixty-three people with T2DM were randomly assigned to HIIT, MICT, or non-exercising controls. Individuals were trained with HIIT at 90 and 30% of their VO2peak (1:2 min ratio) starting from 8 up to 16 intervals and MICT at 50% of VO2peak, on a cycle ergometer, 3 times/week for 12 weeks under supervision. The primary outcome measure was the change in HbA1c. Aerobic capacity, cardiovascular responses, anthropometric measures, body composition, glycaemic, and cardiometabolic risk factors were measured at the beginning and the end of the 12-week training period. There was no significant difference between HIIT and MICT or when compared to the control for HbA1c, glucose, insulin resistance, blood lipids, cardiovascular responses, anthropometric measures, body composition, and abdominal and visceral fat (padj > 0.05). HIIT and MICT increased VO2peak significantly compared to controls (p < 0.05) but not to each other (p > 0.05). Both HIIT and MICT improved VO2peak and HbA1c after 12 weeks of training compared to their baseline, furthermore, only MICT caused additional improvements in cardiovascular responses, anthropometric measures, and abdominal fat compared to baseline (p < 0.05). As a conclusion, isoenergetic HIIT or MICT did not improve HbA1c. The two protocols were equally efficient for improvement in aerobic capacity but had little effect on other cardiometabolic factors.Trial registration: ClinicalTrials.gov identifier: NCT03682445.HighlightsHIIT and MICT with equal energy expenditure were equally efficient for aerobic capacity compared to controls.Isoenergetic HIIT or MICT were not superior for improving HbA1c.Isoenergetic HIIT and MICT were not superior to each other for anthropometric measures, body composition, and cardiometabolic risk factors.
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Affiliation(s)
- Gulin Findikoglu
- Faculty of Medicine, Department of Physical Medicine and Rehabilitation, University of Pamukkale, Denizli, Turkey
| | - Abdurrahim Altinkapak
- Faculty of Medicine, Department of Physical Medicine and Rehabilitation, University of Pamukkale, Denizli, Turkey
| | - Guzin Fidan Yaylali
- Faculty of Medicine, Department of Endocrinology and Metabolism Diseases, University of Pamukkale, Denizli, Turkey
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19
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Yin M, Chen Z, Nassis GP, Liu H, Li H, Deng J, Li Y. Chronic high-intensity interval training and moderate-intensity continuous training are both effective in increasing maximum fat oxidation during exercise in overweight and obese adults: A meta-analysis. J Exerc Sci Fit 2023; 21:354-365. [PMID: 37701124 PMCID: PMC10494468 DOI: 10.1016/j.jesf.2023.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 08/27/2023] [Accepted: 08/29/2023] [Indexed: 09/14/2023] Open
Abstract
Objective to (1) systematically review the chronic effect of high-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) on maximal fat oxidation (MFO) in overweight and obese adults, and (2) explore MFO influencing factors and its dose-response relationships with HIIT and MICT. Methods Studies using a between-group design involving overweight and obese adults and assessing the effect of HIIT and MICT on MFO were included. A meta-analysis on MFO indices was conducted, and the observed heterogeneities were explored through subgroup, regression, and sensitivity analyses. Results Thirteen studies of moderate to high quality with a total of 519 overweight and obese subjects were included in this meta-analysis (HIIT, n = 136; MICT, n = 235; Control, n = 148). HIIT displayed a statistically significant favorable effect on MFO compared to no-training (MD = 0.07; 95%CI [0.03 to 0.11]; I2 = 0%). Likewise, MICT displayed a statistically significant favorable effect on MFO compared to no-training (MD = 0.10; 95%CI [0.06 to 0.15]; I2 = 95%). Subgroup and regression analyses revealed that exercise intensity (Fatmax vs. non-Fatmax; %VO2peak), exercise mode, BMI, and VO2peak all significantly moderated MICT on MFO. When analyzing studies that have directly compared HIIT and MCIT in obese people, it seems there is no difference in the MFO change (MD = 0.01; 95%CI [-0.02 to 0.04]; I2 = 64%). No publication bias was found in any of the above meta-analyses (Egger's test p > 0.05 for all). Conclusion Both HIIT and MICT are effective in improving MFO in overweight and obese adults, and they have similar effects. MCIT with an intensity of 65-70% VO2peak, performed 3 times per week for 60 min per session, will optimize MFO increases in overweight and obese adults. Given the lack of studies examining the effect of HIIT on MFO in overweight and obese adults and the great diversity in the training protocols in the existing studies, we were unable to make sound recommendations for training.
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Affiliation(s)
- Mingyue Yin
- School of Athletic Performance, Shanghai University of Sport, Shanghai, China
| | - Zhili Chen
- School of Athletic Performance, Shanghai University of Sport, Shanghai, China
| | - George P. Nassis
- Department of Physical Education, College of Education, United Arab Emirates University, Al Ain, Abu Dhabi, United Arab Emirates
- Department of Sports Science and Clinical Biomechanics, SDU Sport and Health Sciences Cluster (SHSC), University of Southern Denmark, Odense, Denmark
| | - Hengxian Liu
- School of Athletic Performance, Shanghai University of Sport, Shanghai, China
| | - Hansen Li
- Department of Physical Education, Southwest University, Chongqing, China
| | - Jianfeng Deng
- School of Athletic Performance, Shanghai University of Sport, Shanghai, China
| | - Yongming Li
- School of Athletic Performance, Shanghai University of Sport, Shanghai, China
- China Institute of Sport Science, Beijing, China
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20
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Kramer AM, Martins JB, de Oliveira PC, Lehnen AM, Waclawovsky G. High-intensity interval training is not superior to continuous aerobic training in reducing body fat: A systematic review and meta-analysis of randomized clinical trials. J Exerc Sci Fit 2023; 21:385-394. [PMID: 37927356 PMCID: PMC10624584 DOI: 10.1016/j.jesf.2023.09.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 09/10/2023] [Accepted: 09/16/2023] [Indexed: 11/07/2023] Open
Abstract
Background/Objective Guidelines on obesity management reinforce regular exercise to reduce body fat. Exercise modalities, including high-intensity interval training (HIIT), appear to produce a similar effect to continuous aerobic training (CAT) on body fat. However, they have not addressed the chronic effect of HIIT vs. CAT on body fat assessed by dual energy X-ray absorptiometry (DEXA). Thus, we compared the effectiveness of CAT vs. HIIT protocols on body fat (absolute or relative) (%BF) and abdominal visceral fat reduction, assessed by DEXA, in adults with overweight and obesity. Methods We conducted a systematic review and meta-analysis of randomized clinical trials (RCTs) including both female or male adults with excess body weight. We performed searches in the databases MEDLINE (PubMed), EMBASE, Scopus, LILACS, Web of Science and Cochrane. Results In our analysis (11 RCTs), we found no greater benefit on %BF of HIIT vs. CAT (MD -0.55%, 95% CI -1.42 to 0.31; p = 0.209). As for abdominal visceral fat, no training modality was superior (SMD: -0.05, 95% CI -0.29 to 0.19; p = 0.997). Regarding secondary outcomes (body weight, BMI, VO2 max, glycemic and lipid profiles), HIIT shows greater benefit than CAT in increasing VO2 max and fasting blood glucose and reducing total cholesterol. Conclusion HIIT is not superior to CAT in reducing %BF or abdominal visceral fat in individuals characterized by excess weight. However, HIIT showed beneficial effects on cardiorespiratory fitness, total cholesterol and fasting blood glucose when compared to CAT.
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Affiliation(s)
- Ana Marenco Kramer
- Instituto de Cardiologia do Rio Grande do Sul/Fundação Universitária de Cardiologia, Porto Alegre, Brazil
| | - Jocelito Bijoldo Martins
- Instituto de Cardiologia do Rio Grande do Sul/Fundação Universitária de Cardiologia, Porto Alegre, Brazil
| | | | - Alexandre Machado Lehnen
- Instituto de Cardiologia do Rio Grande do Sul/Fundação Universitária de Cardiologia, Porto Alegre, Brazil
| | - Gustavo Waclawovsky
- Instituto de Cardiologia do Rio Grande do Sul/Fundação Universitária de Cardiologia, Porto Alegre, Brazil
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21
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Zhou H, Chen C, Hu H, Jiang B, Yin Y, Zhang K, Shen M, Wu S, Wang Z. High-intensity interval training improves fatty infiltration in the rotator cuff through the β3 adrenergic receptor in mice. Bone Joint Res 2023; 12:455-466. [PMID: 37524338 PMCID: PMC10390263 DOI: 10.1302/2046-3758.128.bjr-2022-0309.r2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/02/2023] Open
Abstract
Aims Rotator cuff muscle atrophy and fatty infiltration affect the clinical outcomes of rotator cuff tear patients. However, there is no effective treatment for fatty infiltration at this time. High-intensity interval training (HIIT) helps to activate beige adipose tissue. The goal of this study was to test the role of HIIT in improving muscle quality in a rotator cuff tear model via the β3 adrenergic receptor (β3AR). Methods Three-month-old C57BL/6 J mice underwent a unilateral rotator cuff injury procedure. Mice were forced to run on a treadmill with the HIIT programme during the first to sixth weeks or seventh to 12th weeks after tendon tear surgery. To study the role of β3AR, SR59230A, a selective β3AR antagonist, was administered to mice ten minutes before each exercise through intraperitoneal injection. Supraspinatus muscle, interscapular brown fat, and inguinal subcutaneous white fat were harvested at the end of the 12th week after tendon tear and analyzed biomechanically, histologically, and biochemically. Results Histological analysis of supraspinatus muscle showed that HIIT improved muscle atrophy, fatty infiltration, and contractile force compared to the no exercise group. In the HIIT groups, supraspinatus muscle, interscapular brown fat, and inguinal subcutaneous white fat showed increased expression of tyrosine hydroxylase and uncoupling protein 1, and upregulated the β3AR thermogenesis pathway. However, the effect of HIIT was not present in mice injected with SR59230A, suggesting that HIIT affected muscles via β3AR. Conclusion HIIT improved supraspinatus muscle quality and function after rotator cuff tears by activating systemic sympathetic nerve fibre near adipocytes and β3AR.
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Affiliation(s)
- Hecheng Zhou
- Department of Orthopaedic Surgery, The Third Xiangya Hospital of Central South University, Changsha, China
- Xiangya Medical School of Central South University, Changsha, China
| | - Chuanshun Chen
- Department of Orthopaedic Surgery, The Third Xiangya Hospital of Central South University, Changsha, China
- Xiangya Medical School of Central South University, Changsha, China
| | - Hai Hu
- Department of Orthopaedic Surgery, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Binbin Jiang
- Department of Orthopaedic Surgery, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Yuesong Yin
- Department of Orthopaedic Surgery, The Third Xiangya Hospital of Central South University, Changsha, China
- Xiangya Medical School of Central South University, Changsha, China
| | - Kexiang Zhang
- Department of Orthopaedic Surgery, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Minren Shen
- Department of Orthopaedic Surgery, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Song Wu
- Department of Orthopaedic Surgery, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Zili Wang
- Department of Orthopaedic Surgery, The Third Xiangya Hospital of Central South University, Changsha, China
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22
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Liu Y, Zhou A, Li F, Yue T, Xia Y, Yao Y, Zhou X, Zhang Y, Wang Y. Aerobic capacity and [Formula: see text] kinetics adaptive responses to short-term high-intensity interval training and detraining in untrained females. Eur J Appl Physiol 2023; 123:1685-1699. [PMID: 36995431 DOI: 10.1007/s00421-023-05182-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Accepted: 03/14/2023] [Indexed: 03/31/2023]
Abstract
PURPOSE This study investigated the physical fitness and oxygen uptake kinetics (τ[Formula: see text]) along with the O2 delivery and utilization (heart rate kinetics, τHR; deoxyhemoglobin/[Formula: see text] ratio, ∆[HHb]/[Formula: see text]) adaptations of untrained female participants responding to 4 weeks of high-intensity interval training (HIIT) and 2 weeks of detraining. METHODS Participants were randomly assigned to HIIT (n = 11, 4 × 4 protocol) or nonexercising control (n = 9) groups. Exercising group engaged 4 weeks of treadmill HIIT followed by 2 weeks of detraining while maintaining daily activity level. Ramp-incremental (RI) tests and step-transitions to moderate-intensity exercise were performed. Aerobic capacity and performance (maximal oxygen uptake, [Formula: see text]; gas-exchange threshold, GET; power output, PO), body composition (skeletal muscle mass, SMM; body fat percentage, BF%), muscle oxygenation status (∆[HHb]), [Formula: see text], and HR kinetics were assessed. RESULTS HIIT elicited improvements in aerobic capacity ([Formula: see text], + 0.17 ± 0.04 L/min; GET, + 0.18 ± 0.05 L/min, P < 0.01; PO-[Formula: see text], ± 23.36 ± 8.37 W; PO-GET, + 17.18 ± 3.07 W, P < 0.05), body composition (SMM, + 0.92 ± 0.17 kg; BF%, - 3.08% ± 0.58%, P < 0.001), and speed up the τ[Formula: see text] (- 8.04 ± 1.57 s, P < 0.001) significantly, extending to better ∆[HHb]/[Formula: see text] ratio (1.18 ± 0.08 to 1.05 ± 0.14). After a period of detraining, the adaptation in body composition and aerobic capacity, as well as the accelerated τ[Formula: see text] were maintained in the HIIT group, but the PO-[Formula: see text] and PO-GET declined below the post-training level (P < 0.05), whereas no changes were reported in controls (P > 0.05). Four weeks of HIIT induced widespread physiological adaptations in females, and the majority of improvements were preserved after 2 weeks of detraining except for power output corresponding to [Formula: see text] and GET.
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Affiliation(s)
- Yujie Liu
- School of Sports Medicine and Rehabilitation, Beijing Sport University, Beijing, 100084, China
| | - Aiyi Zhou
- School of Sports Medicine and Rehabilitation, Beijing Sport University, Beijing, 100084, China
| | - Fengya Li
- School of Sports Medicine and Rehabilitation, Beijing Sport University, Beijing, 100084, China
| | - Tian Yue
- School of Sports Medicine and Rehabilitation, Beijing Sport University, Beijing, 100084, China
| | - Yuncan Xia
- School of Sports Medicine and Rehabilitation, Beijing Sport University, Beijing, 100084, China
| | - Yibing Yao
- School of Sports Medicine and Rehabilitation, Beijing Sport University, Beijing, 100084, China
| | - Xiaoxiao Zhou
- School of Sports Medicine and Rehabilitation, Beijing Sport University, Beijing, 100084, China
| | - Yihong Zhang
- School of Sports Medicine and Rehabilitation, Beijing Sport University, Beijing, 100084, China
| | - Yan Wang
- School of Sports Medicine and Rehabilitation, Beijing Sport University, Beijing, 100084, China.
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23
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Matias AA, Albin IF, Glickman L, Califano PA, Faller JM, Layec G, Ives SJ. Impact of high intensity interval exercise with and without heat stress on cardiovascular and aerobic performance: a pilot study. BMC Sports Sci Med Rehabil 2023; 15:83. [PMID: 37434243 DOI: 10.1186/s13102-023-00682-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 06/21/2023] [Indexed: 07/13/2023]
Abstract
BACKGROUND Heat stress during aerobic exercise training may offer an additional stimulus to improve cardiovascular function and performance in a cool-temperate environment. However, there is a paucity of information on the additive effects of high-intensity interval exercise (HIIE) and acute heat stress. We aimed to determine the effects of HIIE in combination with acute heat stress on cardiovascular function and exercise performance. METHODS Twelve active (peak O2 consumption [VO2peak]: 47 ± 8 ml·O2/min/kg) young adults were counterbalanced to six sessions of HIIE in hot (HIIE-H, 30 ± 1 °C, 50 ± 5% relative humidity [RH]) or temperate conditions (HIIE-T, 20 ± 2 °C, 15 ± 10% RH). Resting heart rate (HR), HR variability (HRV), central (cBP) and peripheral blood pressure (pBP), peripheral mean arterial pressure (pMAP), pulse wave velocity (PWV), VO2peak, and 5-km treadmill time-trial were measured pre- and post-training. RESULTS Resting HR and HRV were not significantly different between groups. However, expressed as percent change from baseline, cSBP (HIIE-T: + 0.9 ± 3.6 and HIIE-H: -6.6 ± 3.0%, p = 0.03) and pSBP (HIIE-T: -2.0 ± 4.6 and HIIE-H: -8.4 ± 4.7%, p = 0.04) were lower in the heat group. Post-training PWV was also significantly lower in the heat group (HIIE-T: + 0.4% and HIIE-H: -6.3%, p = 0.03). Time-trial performance improved with training when data from both groups were pooled, and estimated VO2peak was not significantly different between groups (HIIE-T: 0.7% and HIIE-H: 6.0%, p = 0.10, Cohen's d = 1.4). CONCLUSIONS The addition of acute heat stress to HIIE elicited additive adaptations in only cardiovascular function compared to HIIE alone in active young adults in temperate conditions, thus providing evidence for its effectiveness as a strategy to amplify exercise-induced cardiovascular adaptations.
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Affiliation(s)
- Alexs A Matias
- Department of Health and Human Physiological Sciences, Skidmore College, 815 N. Broadway, Saratoga Springs, NY, 12866, USA
- Department of Kinesiology, University of Massachusetts at Amherst, Amherst, MA, USA
| | - Isabelle F Albin
- Department of Health and Human Physiological Sciences, Skidmore College, 815 N. Broadway, Saratoga Springs, NY, 12866, USA
| | - Leah Glickman
- Department of Health and Human Physiological Sciences, Skidmore College, 815 N. Broadway, Saratoga Springs, NY, 12866, USA
| | - Peter A Califano
- Department of Health and Human Physiological Sciences, Skidmore College, 815 N. Broadway, Saratoga Springs, NY, 12866, USA
| | - Justin M Faller
- Department of Health and Human Physiological Sciences, Skidmore College, 815 N. Broadway, Saratoga Springs, NY, 12866, USA
| | - Gwenael Layec
- Department of Kinesiology, University of Massachusetts at Amherst, Amherst, MA, USA
- Institute for Applied Life Sciences, University of Massachusetts, Amherst, MA, USA
| | - Stephen J Ives
- Department of Health and Human Physiological Sciences, Skidmore College, 815 N. Broadway, Saratoga Springs, NY, 12866, USA.
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Yuan S, Li X, Liu Q, Wang Z, Jiang X, Burgess S, Larsson SC. Physical Activity, Sedentary Behavior, and Type 2 Diabetes: Mendelian Randomization Analysis. J Endocr Soc 2023; 7:bvad090. [PMID: 37415875 PMCID: PMC10321115 DOI: 10.1210/jendso/bvad090] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Indexed: 07/08/2023] Open
Abstract
Context The causality and pathways of the associations between physical activity and inactivity and the risk of type 2 diabetes remain inconclusive. Objective We conducted an updated mendelian randomization (MR) study to explore the associations of moderate-to-vigorous physical activity (MVPA) and leisure screen time (LST) with type 2 diabetes mellitus (T2DM). Methods Genetic variants strongly associated with MVPA or LST with low linkage disequilibrium were selected as instrumental variables from a genome-wide meta-analysis including more than 600 000 individuals. Summary-level data on T2DM were obtained from the DIAbetes Genetics Replication And Meta-analysis consortium including 898 130 individuals. Data on possible intermediates (adiposity indicators, lean mass, glycemic traits, and inflammatory biomarkers) were extracted from large-scale genome-wide association studies (n = 21 758-681 275). Univariable and multivariable MR analyses were performed to estimate the total and direct effects of MVPA and LST on T2DM. Methylation MR analysis was performed for MVPA in relation to diabetes. Results The odds ratio of T2DM was 0.70 (95% CI, 0.55-0.88; P = .002) per unit increase in the log-odds ratio of having MVPA and 1.45 (95% CI, 1.30-1.62; P = 7.62 × 10-11) per SD increase in genetically predicted LST. These associations attenuated in multivariable MR analyses adjusted for genetically predicted waist-to-hip ratio, body mass index, lean mass, and circulating C-reactive protein. The association between genetically predicted MVPA and T2DM attenuated after adjusting for genetically predicted fasting insulin levels. Two physical activity-related methylation biomarkers (cg17332422 in ADAMTS2 and cg09531019) were associated with the risk of T2DM (P < .05). Conclusion The study suggests causal associations of MVPA and LST with T2DM that appear to be mediated by obesity, lean mass, and chronic low-grade inflammation.
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Affiliation(s)
- Shuai Yuan
- Unit of Cardiovascular and Nutritional Epidemiology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, 17165, Sweden
| | - Xue Li
- School of Public Health and the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
| | - Qianwen Liu
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, 17165, Sweden
| | - Zhe Wang
- Icahn School of Medicine at Mount Sinai, The Charles Bronfman Institute for Personalized Medicine, New York, NY 10029, USA
| | - Xia Jiang
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, 17165, Sweden
| | - Stephen Burgess
- MRC Biostatistics Unit, University of Cambridge, Cambridge CB2 1TN, UK
- Department of Public Health and Primary Care, University of Cambridge, Cambridge CB2 1TN, UK
| | - Susanna C Larsson
- Unit of Cardiovascular and Nutritional Epidemiology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, 17165, Sweden
- Unit of Medical Epidemiology, Department of Surgical Sciences, Uppsala University, Uppsala, 75185, Sweden
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Gropper H, John JM, Sudeck G, Thiel A. "I just had the feeling that the interval training is more beneficial": young adults' subjective experiences of physical fitness and the role of training modes. Front Sports Act Living 2023; 5:1115944. [PMID: 37255731 PMCID: PMC10225535 DOI: 10.3389/fspor.2023.1115944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Accepted: 04/24/2023] [Indexed: 06/01/2023] Open
Abstract
Objective Compelling evidence has shown that high-intensity interval training (HIIT) is associated with substantial increases in physical fitness. However, little is known about whether and how individuals experience these adaptations over time. The purpose of this study is, therefore, to explore how physically inactive young adults subjectively experience physical fitness and its development as they start to exercise and how these experiences relate to different intensity domains (i.e., moderate and severe) as well as to training modes [i.e., HIIT and moderate intensity continuous training (MICT)] and their sequential administration (i.e., HIIT-MICT and MICT-HIIT). Methods Thirty-one inactive participants completed a 15-week two-period sequential exercise intervention in which they first trained for six weeks in a HIIT or a MICT group and subsequently switched training modes. Interviews using the biographical mapping method were conducted at the end of the intervention to assess participants' exercise- and fitness-related experiences over the past weeks. To assess experiential patterns, we conducted a reflexive thematic analysis. Results We developed three themes that represent the temporal and processual character of starting to exercise after a prolonged period of inactivity: (1) Inactive young adults are not all the same when starting to exercise; (2) Developing physical fitness is a multi-faceted and individual experience; and (3) Feeling physically fit (or not) fosters large-scale effects. Conclusion Our results show that, in retrospect, participants mostly deemed HIIT to be more effective than MICT. Our findings also emphasize that physical fitness is a complex and subjective experience that manifests in various ways over time. The idiosyncrasy of physical fitness experiences reiterates the necessity for individually tailored exercise prescriptions instead of one-size-fits-all approaches.
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Affiliation(s)
- Hannes Gropper
- Institute of Sports Science, Eberhard Karls University Tübingen, Tübingen, Germany
- Interfaculty Research Institute for Sport and Physical Activity, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Jannika M. John
- Institute of Sports Science, Eberhard Karls University Tübingen, Tübingen, Germany
- Interfaculty Research Institute for Sport and Physical Activity, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Gorden Sudeck
- Institute of Sports Science, Eberhard Karls University Tübingen, Tübingen, Germany
- Interfaculty Research Institute for Sport and Physical Activity, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Ansgar Thiel
- Institute of Sports Science, Eberhard Karls University Tübingen, Tübingen, Germany
- Interfaculty Research Institute for Sport and Physical Activity, Eberhard Karls University Tübingen, Tübingen, Germany
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Zhu H, Jin J, Zhao G. The effects of water-based exercise on body composition: A systematic review and meta-analysis. Complement Ther Clin Pract 2023; 52:101766. [PMID: 37167802 DOI: 10.1016/j.ctcp.2023.101766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 04/18/2023] [Accepted: 05/01/2023] [Indexed: 05/13/2023]
Abstract
AIMS This study aimed to investigate the effects of water-based exercise (WBE) on body composition. METHODS Trials published up to October 28, 2022 were searched using the PubMed, EMBASE, Web of Science, Cochrane, Scopus, and Ovid databases. Randomized controlled trials of healthy adults published in English, comparing WBE and control groups, were included. Other studies with different research designs and participants with medical diagnoses were excluded. The main outcome measures were body weight (BW), body fat mass (BFM), body fat percentage (BFP), lean mass (LM), and skeletal muscle mass (SMM). RESULTS Overall, 17,458 potential studies were identified. After a closer inspection, 79 full-length articles were considered for further screening. Finally, 20 studies, involving 565 participants, were included in the meta-analysis. The WBE was beneficial in reducing BW, BFM, and BFP and increasing LM and SMM. Subgroup analyses were conducted based on different exercise intensities and times per week. Moderate- or moderate-vigorous-intensity exercise helped improve body composition, while lower-intensity WBE or aquatic high-intensity interval training (HIIT) seemed less helpful. Training for <120 min/week was insufficient to improve body composition. Training for >120 min/week was associated with improvements in body composition. CONCLUSIONS Moderate- or moderate-vigorous-intensity WBE helps improve body composition. Adults are encouraged to exercise for >120 min/week.
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Affiliation(s)
- Haifeng Zhu
- Taizhou People's Hospital, Taizhou City, Jiangsu Province, China
| | - Jing Jin
- Taizhou People's Hospital, Taizhou City, Jiangsu Province, China
| | - Gaonian Zhao
- Taizhou People's Hospital, Taizhou City, Jiangsu Province, China.
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Zhou H, Wang Z, Chen C, Hu H, Jiang B, Yin Y, Zhang K, Shen M, Wu S. Effect of High-Intensity Interval Training on Fatty Infiltration After Delayed Rotator Cuff Repair in a Mouse Model. Orthop J Sports Med 2023; 11:23259671231170192. [PMID: 37223073 PMCID: PMC10201644 DOI: 10.1177/23259671231170192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Accepted: 02/15/2023] [Indexed: 05/25/2023] Open
Abstract
Background Fatty infiltration (FI) of the rotator cuff muscles is correlated with shoulder function and retear rates after rotator cuff repair. High-intensity interval training (HIIT) induces beige adipose tissue to express more uncoupling protein 1 (UCP1) to consume lipids. The beta-3 adrenergic receptor (β3AR) is located on adipocyte membrane and induces thermogenesis. Purpose To test the role of HIIT in improving muscle quality and contractility in a delayed rotator cuff repair mouse model via β3AR. Study Design Controlled laboratory study. Methods Three-month-old C57BL/6J mice underwent a unilateral supraspinatus (SS) tendon transection with a 6-week delayed tendon repair. Mice ran on a treadmill with the HIIT program for 6 weeks after tendon transection or after delayed repair. To study the role of β3AR, SR59230A, a selective β3AR antagonist, was administered to mice 10 minutes before each exercise through intraperitoneal injection. The SS, interscapular brown adipose tissue (iBAT), and subcutaneous inguinal white adipose tissue (ingWAT) were harvested at the end of the 12th week after tendon transection and were analyzed by histology and Western blotting. Tests were performed to assess muscle contractility of the SS. Results Histologic analysis of SS showed that HIIT prevented and reversed muscle atrophy and FI. The contractile tests showed higher contractility of the SS in the HIIT groups than in the no-exercise group. In the HIIT groups, SS, iBAT, and ingWAT all showed increased expression of tyrosine hydroxylase, UCP1, and upregulated β3AR thermogenesis pathway. However, SR59230A inhibited HIIT, suggesting that the effect of HIIT depends on β3AR. Conclusion HIIT improved SS quality and function after delayed rotator cuff repair through a β3AR-dependent mechanism. Clinical Relevance HIIT may serve as a new rehabilitation method for patients with rotator cuff muscle atrophy and FI after rotator cuff repair to improve postoperative clinical outcomes.
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Affiliation(s)
- Hecheng Zhou
- Department of Orthopaedic Surgery, The Third Xiangya Hospital of Central South University, Changsha, Hunan Province, China
- Clinical Medicine Eight-Year Program, Xiangya Medical School of Central South University, Changsha, Hunan, China
| | - Zili Wang
- Department of Orthopaedic Surgery, The Third Xiangya Hospital of Central South University, Changsha, Hunan Province, China
| | - Chuanshun Chen
- Department of Orthopaedic Surgery, The Third Xiangya Hospital of Central South University, Changsha, Hunan Province, China
- Clinical Medicine Eight-Year Program, Xiangya Medical School of Central South University, Changsha, Hunan, China
| | - Hai Hu
- Department of Orthopaedic Surgery, The Third Xiangya Hospital of Central South University, Changsha, Hunan Province, China
| | - Binbin Jiang
- Department of Orthopaedic Surgery, The Third Xiangya Hospital of Central South University, Changsha, Hunan Province, China
| | - Yuesong Yin
- Department of Orthopaedic Surgery, The Third Xiangya Hospital of Central South University, Changsha, Hunan Province, China
- Clinical Medicine Eight-Year Program, Xiangya Medical School of Central South University, Changsha, Hunan, China
| | - Kexiang Zhang
- Department of Orthopaedic Surgery, The Third Xiangya Hospital of Central South University, Changsha, Hunan Province, China
| | - Minren Shen
- Department of Orthopaedic Surgery, The Third Xiangya Hospital of Central South University, Changsha, Hunan Province, China
| | - Song Wu
- Department of Orthopaedic Surgery, The Third Xiangya Hospital of Central South University, Changsha, Hunan Province, China
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Effects of 12-week combined training versus high intensity interval training on cardiorespiratory fitness, body composition and fat metabolism in obese male adults. J Exerc Sci Fit 2023; 21:193-201. [PMID: 36820014 PMCID: PMC9937988 DOI: 10.1016/j.jesf.2023.01.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 01/28/2023] [Accepted: 01/30/2023] [Indexed: 02/04/2023] Open
Abstract
Background /Objectives: A weekly combination of a high volume of moderate-intensity continuous training (MICT) with a low volume of high-intensity interval training (HIIT) provides important improvements in body composition and physical capacities in individuals with obesity. However, previous studies did not determine the weekly proportions of HIIT and MICT a priori. This study aimed to investigate changes in body composition, physical capacities and the fat oxidation rate in obese male adults by comparing a combination of MICT and HIIT, called combined training (COMB), with HIIT for a 12-week period. Methods Thirty-four obese male adults (mean age: 39.4 ± 7.0 y; mean body mass index [BMI] 34.0 ± 4.2 kg m-2) participated in this study (n = 18 for COMB, n = 16 HIIT), attending ∼ 36 training sessions. The COMB group performed 3 repetitions of 2 min at 95% of peak oxygen uptake (V'O2 peak) (e.g., HIIT ≤20%), followed by 30 min at 60% of VO2 peak (e.g., MICT ≥80%). The HIIT group performed 5-7 repetitions of 2 min at 95% of VO2 peak. At baseline (PRE) and at the end of the training period (POST), body composition, VO2 peak, and the fat oxidation rate were measured. The two training programs were equivalent in caloric expenditure. Results At POST, body mass (BM) and fat mass (FM) decreased by a mean of 3.09 ± 3.21 kg and 3.90 ± 2.40 kg, respectively (P < 0.05), in both groups and V'O2 peak increased in both groups by a mean of 0.47 ± 0.34 L min-1 (P < 0.05). The maximal fat oxidation rate increased similarly in both groups from 0.32 ± 0.05 to 0.36 ± 0.06 g min-1 (P < 0.05). Conclusion COMB training represents a viable alternative to HIIT to improve anthropometric characteristics, physical capacities and fat oxidation in obese male adults.
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Perone F, Pingitore A, Conte E, Halasz G, Ambrosetti M, Peruzzi M, Cavarretta E. Obesity and Cardiovascular Risk: Systematic Intervention Is the Key for Prevention. Healthcare (Basel) 2023; 11:healthcare11060902. [PMID: 36981559 PMCID: PMC10048800 DOI: 10.3390/healthcare11060902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 03/09/2023] [Accepted: 03/16/2023] [Indexed: 03/30/2023] Open
Abstract
Obesity is a serious public health issue and associated with an increased risk of cardiovascular disease events and mortality. The risk of cardiovascular complications is directly related to excess body fat mass and ectopic fat deposition, but also other obesity-related complications such as pre-type 2 diabetes, obstructive sleep apnoea, and non-alcoholic fatty liver diseases. Body mass index and waist circumference are used to classify a patient as overweight or obese and to stratify cardiovascular risk. Physical activity and diet, despite being key points in preventing adverse events and reducing cardiovascular risk, are not always successful strategies. Pharmacological treatments for weight reduction are promising strategies, but are restricted by possible safety issues and cost. Nonetheless, these treatments are associated with improvements in cardiovascular risk factors, and studies are ongoing to better evaluate cardiovascular outcomes. Bariatric surgery is effective in reducing the incidence of death and cardiovascular events such as myocardial infarction and stroke. Cardiac rehabilitation programs in obese patients improve cardiovascular disease risk factors, quality of life, and exercise capacity. The aim of this review was to critically analyze the current role and future aspects of lifestyle changes, medical and surgical treatments, and cardiac rehabilitation in obese patients, to reduce cardiovascular disease risk and mortality, and to highlight the need for a multidisciplinary approach to improving cardiovascular outcomes.
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Affiliation(s)
- Francesco Perone
- Cardiac Rehabilitation Unit, Rehabilitation Clinic "Villa delle Magnolie", 81020 Castel Morrone, Caserta, Italy
| | - Annachiara Pingitore
- Department of General and Specialistic Surgery "Paride Stefanini", Sapienza University of Rome, 00161 Rome, Italy
| | - Edoardo Conte
- Department of Clinical Cardiology and Cardiovascular Imaging, Galeazzi-Sant'Ambrogio Hospital IRCCS, 20100 Milan, Lombardy, Italy
| | - Geza Halasz
- Cardiology Department, Azienda Ospedaliera San Camillo Forlanini, 00152 Rome, Italy
| | - Marco Ambrosetti
- Cardiovascular Rehabilitation Unit, ASST Crema Santa Marta Hospital, 26027 Rivolta D'Adda, Cremona, Italy
| | - Mariangela Peruzzi
- Department of Clinical Internal, Anesthesiology and Cardiovascular Sciences, Sapienza University of Rome, 00161 Rome, Italy
- Mediterranea Cardiocentro, 80122 Naples, Campania, Italy
| | - Elena Cavarretta
- Mediterranea Cardiocentro, 80122 Naples, Campania, Italy
- Department of Medical-Surgical Sciences and Biotechnologies, Sapienza University of Rome, 04100 Latina, Latina, Italy
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Guo Z, Li M, Cai J, Gong W, Liu Y, Liu Z. Effect of High-Intensity Interval Training vs. Moderate-Intensity Continuous Training on Fat Loss and Cardiorespiratory Fitness in the Young and Middle-Aged a Systematic Review and Meta-Analysis. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:4741. [PMID: 36981649 PMCID: PMC10048683 DOI: 10.3390/ijerph20064741] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 02/26/2023] [Accepted: 03/05/2023] [Indexed: 06/18/2023]
Abstract
OBJECTIVES This systematic review is conducted to evaluate the effect of high-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) on body composition and cardiorespiratory fitness (CRF) in the young and middle-aged. METHODS Seven databases were searched from their inception to 22 October 2022 for studies (randomized controlled trials only) with HIIT and MICT intervention. Meta-analysis was carried out for within-group (pre-intervention vs. post-intervention) and between-group (HIIT vs. MICT) comparisons for change in body mass (BM), body mass index (BMI), waist circumference (WC), percent fat mass (PFM), fat mass (FM), fat-free mass (FFM), and CRF. RESULTS A total of 1738 studies were retrieved from the database, and 29 studies were included in the meta-analysis. Within-group analyses indicated that both HIIT and MICT can bring significant improvement in body composition and CRF, except for FFM. Between-group analyses found that compared to MICT, HIIT brings significant benefits to WC, PFM, and VO2peak. CONCLUSIONS The effect of HIIT on fat loss and CRF in the young and middle-aged is similar to or better than MICT, which might be influenced by age (18-45 years), complications (obesity), duration (>6 weeks), frequency, and HIIT interval. Despite the clinical significance of the improvement being limited, HIIT appears to be more time-saving and enjoyable than MICT.
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Hu M, Nie J, Lei OK, Shi Q, Kong Z. Acute effect of high-intensity interval training versus moderate-intensity continuous training on appetite perception: A systematic review and meta-analysis. Appetite 2023; 182:106427. [PMID: 36565929 DOI: 10.1016/j.appet.2022.106427] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 11/15/2022] [Accepted: 12/14/2022] [Indexed: 12/24/2022]
Abstract
Interval training protocols have gained popularity over the years, but their impact on appetite sensation compared to officially recommended training method, moderate intensity continuous training (MICT) is not well understood. Thus, this systematic review and meta-analysis aimed to compare a single session of high intensity interval training (HIIT) including sprint interval training (SIT) with MICT on appetite perception measured by the visual analog scale (VAS). After searching up articles published up to September 2021, 13 randomized controlled studies were included in the meta-analysis. Outcomes of meta-analysis demonstrated that both acute sessions of HIIT/SIT and MICT suppressed appetite compared to no-exercise control groups immediately post exercise but there were no significant effects 30-90 min post exercise or in AUC values, indicating a transient effect of exercise on appetite sensations. Moreover, differences in appetite sensations between HIIT/SIT and MICT were negligible immediately post exercise, but HIIT/SIT suppressed hunger (MD = -6.347 [-12.054, -0.639], p = 0.029) to a greater extent than MICT 30- to 90-min post exercise, while there was a lack of consistency other VAS subscales of appetite. More studies that address the impact of exercising timing, nutrient compositions of energy intake (energy intake (EI)) and differences in participants' characteristics and long-term studies analyzing chronic effects are needed to comprehensively examine the differences between HIIT/SIT and MICT on appetite and EI. SYSTEMATIC REVIEW REGISTRATION: [https://www.crd.york.ac.uk/PROSPERO], Identifier [CRD42021284898].
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Affiliation(s)
- Mingzhu Hu
- Faculty of Education, University of Macau, Macao, China.
| | - Jinlei Nie
- Faculty of Health Sciences and Sports, Macao Polytechnic University, Macao, China.
| | - On Kei Lei
- Faculty of Education, University of Macau, Macao, China.
| | - Qingde Shi
- Faculty of Health Sciences and Sports, Macao Polytechnic University, Macao, China.
| | - Zhaowei Kong
- Faculty of Education, University of Macau, Macao, China.
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Maaloul R, Marzougui H, Ben Dhia I, Ghroubi S, Tagougui S, Kallel C, Driss T, Elleuch MH, Ayadi F, Turki M, Hammouda O. Effectiveness of Ramadan diurnal intermittent fasting and concurrent training in the management of obesity: is the combination worth the weight? Nutr Metab Cardiovasc Dis 2023; 33:659-666. [PMID: 36710112 DOI: 10.1016/j.numecd.2022.12.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 11/27/2022] [Accepted: 12/07/2022] [Indexed: 01/30/2023]
Abstract
BACKGROUND AND AIMS We investigated, in men with obesity, the efficacy of the combination of two strategies (Ramadan diurnal intermittent fasting 'RDIF' strategy vs RDIF plus concurrent training program 'RDIF-CT' strategy) known for their positive impact on body composition and then we explored the possible impact on metabolic and inflammatory biomarkers. METHODS AND RESULTS Twenty obese men, age: 31.8 ± 7.05 years, BMI: 33.1 ± 4.2 kg m-2, performing regularly RDIF, were randomized into two groups: RDIF-CT (n = 10) and RDIF without training (RDIF-NCT) (n = 10). The RDIF-CT group participated in High intensity interval training (HIIT) program combined with resistance exercises for 4 weeks. Body composition, blood glucose, lipid profile, liver biomarkers and inflammation were assessed before and after 4-week RDIF. Both groups showed a significant decrease in weight, fat mass (FM), fat percentage (Fat%) and waist circumference (WC) and an improvement in blood glucose, lipid profile and inflammation. Fat free mass decreased significantly in RDIF-NCT (p < 0.05) while remaining unchanged in RDIF-CT. However, RDIF-CT induced greater improvements in body composition (i.e., weight, FM, Fat% and WC (p < 0.05, p < 0.01, p < 0.01 and p < 0.05; respectively)) as well as greater decrease in lipid biomarkers (i.e., TC, TG and LDL (p < 0.01 for all)), inflammation (i.e., CRP (p < 0.05)), and liver damage (i.e., ASAT, ALAT and Gamma-GT (p < 0.01, p < 0.05 and p < 0.001; respectively)) compared to RDIF-NCT group pre-post intervention. CONCLUSIONS Our results suggest that a combination of RDIF and CT induces greater changes in body composition, lipid profile, inflammation and liver biomarkers compared to RDIF strategy alone. CLINICAL TRIAL REGISTER PACTR202203475387226.
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Affiliation(s)
- Rami Maaloul
- High Institute of Sport and Physical Education of Sfax, University of Sfax, Tunisia; Research Laboratory, Molecular Bases of Human Pathology, LR19ES13, Faculty of Medicine, University of Sfax, Tunisia
| | - Houssem Marzougui
- High Institute of Sport and Physical Education of Sfax, University of Sfax, Tunisia; Research Laboratory, Molecular Bases of Human Pathology, LR19ES13, Faculty of Medicine, University of Sfax, Tunisia
| | - Imen Ben Dhia
- High Institute of Sport and Physical Education of Sfax, University of Sfax, Tunisia; Research Laboratory of Evaluation and Management of Musculoskeletal System Pathologies, LR20ES09, University of Sfax, Tunisia
| | - Sameh Ghroubi
- Research Laboratory of Evaluation and Management of Musculoskeletal System Pathologies, LR20ES09, University of Sfax, Tunisia
| | - Sémah Tagougui
- Montreal Clinical Research Institute, Montreal, Canada; Université de Lille, Université d'Artois, Université du Littoral Côte d'Opale, ULR 7369-URePSSS-Unité de Recherche Pluridisciplinaire Sport Santé Société, Lille, France
| | | | - Tarak Driss
- Interdisciplinary Laboratory in Neurosciences, Physiology and Psychology: Physical Activity, Health and Learning (LINP2), UFR STAPS, UPL, Paris Nanterre, Nanterre, France
| | - Mohamed Habib Elleuch
- Research Laboratory of Evaluation and Management of Musculoskeletal System Pathologies, LR20ES09, University of Sfax, Tunisia
| | - Fatma Ayadi
- Research Laboratory, Molecular Bases of Human Pathology, LR19ES13, Faculty of Medicine, University of Sfax, Tunisia
| | - Mouna Turki
- Research Laboratory, Molecular Bases of Human Pathology, LR19ES13, Faculty of Medicine, University of Sfax, Tunisia
| | - Omar Hammouda
- Research Laboratory, Molecular Bases of Human Pathology, LR19ES13, Faculty of Medicine, University of Sfax, Tunisia; Interdisciplinary Laboratory in Neurosciences, Physiology and Psychology: Physical Activity, Health and Learning (LINP2), UFR STAPS, UPL, Paris Nanterre, Nanterre, France.
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Liu Y, Xia Y, Yue T, Li F, Zhou A, Zhou X, Yao Y, Zhang Y, Wang Y. Adaptations to 4 weeks of high-intensity interval training in healthy adults with different training backgrounds. Eur J Appl Physiol 2023; 123:1283-1297. [PMID: 36795131 DOI: 10.1007/s00421-023-05152-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 02/03/2023] [Indexed: 02/17/2023]
Abstract
PURPOSE This study investigated the physical fitness and oxygen uptake kinetics ([Formula: see text]) along with the exercise-onset O2 delivery (heart rate kinetics, τHR; changes in normalized deoxyhemoglobin/[Formula: see text] ratio, Δ[HHb]/[Formula: see text]) adaptations of individuals with different physical activity (PA) backgrounds responding to 4 weeks of high-intensity interval training (HIIT), and the possible effects of skeletal muscle mass (SMM) on training-induced adaptations. METHODS Twenty subjects (10 high-PA level, HIIT-H; 10 moderate-PA level, HIIT-M) engaged in 4 weeks of treadmill HIIT. Ramp-incremental (RI) test and step-transitions to moderate-intensity exercise were performed. Cardiorespiratory fitness, body composition, muscle oxygenation status, VO2 and HR kinetics were assessed at baseline and post-training. RESULTS HIIT improved fitness status for HIIT-H ([Formula: see text], + 0.26 ± 0.07 L/min; SMM, + 0.66 ± 0.70 kg; body fat, - 1.52 ± 1.93 kg; [Formula: see text], - 7.11 ± 1.05 s, p < 0.05) and HIIT-M ([Formula: see text], 0.24 ± 0.07 L/min, SMM, + 0.58 ± 0.61 kg; body fat, - 1.64 ± 1.37 kg; [Formula: see text], - 5.48 ± 1.05 s, p < 0.05) except for visceral fat area (p = 0.293) without between-group differences (p > 0.05). Oxygenated and deoxygenated hemoglobin amplitude during the RI test increased for both groups (p < 0.05) except for total hemoglobin (p = 0.179). The Δ[HHb]/[Formula: see text] overshoot was attenuated for both groups (p < 0.05) but only eliminated in HIIT-H (1.05 ± 0.14 to 0.92 ± 0.11), and no change was observed in τHR (p = 0.144). Linear mixed-effect models presented positive effects of SMM on absolute [Formula: see text] (p < 0.001) and ΔHHb (p = 0.034). CONCLUSION Four weeks of HIIT promoted positive adaptations in physical fitness and [Formula: see text] kinetics, with the peripheral adaptations attributing to the observed improvements. The training effects are similar between groups suggesting that HIIT is effective for reaching higher physical fitness levels.
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Affiliation(s)
- Yujie Liu
- School of Sports Medicine and Rehabilitation, Beijing Sport University, Beijing, 100084, China
| | - Yuncan Xia
- School of Sports Medicine and Rehabilitation, Beijing Sport University, Beijing, 100084, China
| | - Tian Yue
- School of Sports Medicine and Rehabilitation, Beijing Sport University, Beijing, 100084, China
| | - Fengya Li
- School of Sports Medicine and Rehabilitation, Beijing Sport University, Beijing, 100084, China
| | - Aiyi Zhou
- School of Sports Medicine and Rehabilitation, Beijing Sport University, Beijing, 100084, China
| | - Xiaoxiao Zhou
- School of Sports Medicine and Rehabilitation, Beijing Sport University, Beijing, 100084, China
| | - Yibing Yao
- School of Sports Medicine and Rehabilitation, Beijing Sport University, Beijing, 100084, China
| | - Yihong Zhang
- School of Sports Medicine and Rehabilitation, Beijing Sport University, Beijing, 100084, China
| | - Yan Wang
- School of Sports Medicine and Rehabilitation, Beijing Sport University, Beijing, 100084, China.
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Sabouri M, Amirshaghaghi F, Hesari MM. High-intensity interval training improves the vascular endothelial function comparing moderate-intensity interval training in overweight or obese adults: A meta-analysis. Clin Nutr ESPEN 2023; 53:100-106. [PMID: 36657899 DOI: 10.1016/j.clnesp.2022.11.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 11/12/2022] [Accepted: 11/30/2022] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Obesity is associated with endothelial dysfunction and cardiovascular diseases. Moderate-intensity continuous training (MICT) is a common method to improve endothelial function and the cardiovascular risk profile in obesity. However, in recent times, high-intensity interval training (HIIT) has become a popular alternative for MICT primarily because of its time efficiency. Therefore, we hypothesized that HIIT is superior to MICT in improving vascular function. We aimed to evaluate this hypothesis by conducting a meta-analysis and quantifying the effect of HIIT on flow-mediated dilation (FMD) in overweight/obese adults. METHODS Databases (Scopus, Web of Science, and PubMed) were searched up to January 2022 for HIIT vs. moderate-intensity interval training (MICT) and HIIT vs. control (CON) studies on endothelial function assessed by flow-mediated dilation (FMD) in overweight and obese adults. From the included studies, standardized mean difference (SMD) and 95% confidence intervals (95% CIs) were calculated. RESULTS 8 studies with 208 participants were included in this meta-analysis. According to the 6 studies, HIIT improved the FMD with an overall change of %2.6 [(95% CI: 0.82 to 4.377), p = 0.004] compared to the MICT in overweight and obese adults. Moreover, based on the 5 studies that compared HIIT and CON, the results showed HIIT significantly increased FMD by 1.83% [(95% CI: 0.478 to 3.187), p = 0.008]. CONCLUSIONS These results showed that exercise training, particularly HIIT, could improve endothelial function in overweight and obese adults.
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Affiliation(s)
- Mostafa Sabouri
- Department of Exercise Physiology & Health Science, University of Tehran, Tehran, Iran; Department of Nutrition and Integrative Physiology, Florida State University, Tallahassee, FL, USA.
| | | | - Mahsa Mahabadi Hesari
- Department of Exercise Physiology & Health Science, University of Tehran, Tehran, Iran
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Gutiérrez-Arroyo J, García-Heras F, Carballo-Leyenda B, Villa-Vicente JG, Rodríguez-Medina J, Rodríguez-Marroyo JA. Effect of a High-Intensity Circuit Training Program on the Physical Fitness of Wildland Firefighters. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:2073. [PMID: 36767438 PMCID: PMC9916003 DOI: 10.3390/ijerph20032073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/17/2023] [Accepted: 01/19/2023] [Indexed: 06/18/2023]
Abstract
Wildland firefighting implies high physical and psychological demands for the personnel involved. Therefore, good physical fitness can help increase the work efficiency of wildland firefighters (WFFs) and safeguard their health. High-intensity circuit training (HICT) could be a good alternative to improve the physical condition of WFFs since it stands out for its functionality and economy. Therefore, the objective of this study was to analyze the effects of HICT on the WFFs' physical fitness. The study involved 9 WFFs (8 males and 1 female; 29.8 ± 2.8 years; 175.6 ± 6.7 cm) who completed a training program and 9 WFF candidates (8 males and 1 female; 24.7 ± 6.6 yr, 176.5 ± 7.0 cm) as a control group. WFFs performed an 8-week HICT program (two weekly training sessions). The training sessions lasted approximately 45 min and were performed at an intensity >80% of maximal heart rate and RPE values >7.5. At the beginning and the end of the intervention, subjects' physical fitness (i.e., aerobic capacity, cardiorespiratory endurance, muscular resistance and explosive strength) was assessed through different tests. After completing the training program, WFFs had significantly increased (p < 0.05) the speed at which the ventilatory thresholds were determined (12.4 ± 13.9 and 5.7 ± 7.3% for the ventilatory and respiratory compensation thresholds, respectively) and also their abdominal (31.2 ± 17.2%), lumbar (34.1 ± 13.5%) and upper limb (13.3 ± 16.0%) strength. Moreover, improvements (p < 0.05) in the explosive strength of legs (7.1 ± 5.8%) and performance in a specific physical employment test (12.2 ± 6.1%) were observed. In conclusion, the results of this study show that an 8-week high-intensity circuit training program could be an effective and safe method to improve WFFs' physical fitness and performance.
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Hu M, Kong Z, Shi Q, Nie J. Acute effect of high-intensity interval training versus moderate-intensity continuous training on appetite-regulating gut hormones in healthy adults: A systematic review and meta-analysis. Heliyon 2023; 9:e13129. [PMID: 36747559 PMCID: PMC9898666 DOI: 10.1016/j.heliyon.2023.e13129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 01/12/2023] [Accepted: 01/17/2023] [Indexed: 01/22/2023] Open
Abstract
Background Exercise intensity has been suggested to influence acute appetite-regulating gut hormone responses after exercise. High intensity interval training (HIIT) with near maximal to maximal intensity or sprint interval training (SIT) with supramaximal intensity might induce greater effects on gut hormones compared to moderate intensity continuous training (MICT), while current findings were inconsistent regarding the effects of these popular training methods. Objective This systematic review and meta-analysis aimed to synthesis the findings in the literature and explore the impact of exercise modality on acylated ghrelin (AG), glucagon-like peptide-1 (GLP-1) and peptide YY (PYY). Methods After searching the major databases (PubMed, Web of science and ScienceDirect, Scopus, Cochrane Library) to find articles published up to May 2022, twelve studies that compared hormone responses to HIIT/SIT and MICT were identified and included in the analysis. Results A random-effects meta-analysis showed that HIIT/SIT and MICT decreased AG concentration and increased GLP-1 and PYY concentration compared with no exercise control group, while interval training protocols, especially SIT protocols, elicited greater effect sizes in suppressing AG levels at all of the analysed time points and PYY immediately post-exercise compared to MICT. Conclusion Acute SIT with lower exercise volume appears to be a more advantageous approach to decrease plasma AG concentration and potentially suppress hunger to a greater extent compared to MICT, despite the similar effects of HIIT/SIT compared to MICT in increasing anorectic hormones (i.e., GLP-1 and PYY). Future studies are needed to further investigate the impact of moderators (e.g., gender, body composition and exercise mode) on the variability of changes in gut hormones after interval trainings.
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Affiliation(s)
| | - Zhaowei Kong
- University of Macau, Macao, China,Corresponding author.
| | - Qingde Shi
- Macao Polytechnic University, Macao, China
| | - Jinlei Nie
- Macao Polytechnic University, Macao, China
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Carrillo‐Arango HA, Atencio‐Osorio MA, López‐Álban CA, Nava‐González EJ, Correa‐Rodríguez M, Izquierdo M, Ramírez‐Vélez R. Metabolic responses to acute sprint interval exercise training performed after an oral 75-gram glucose load in individuals with overweight/obesity. Physiol Rep 2023; 11:e15555. [PMID: 36695728 PMCID: PMC9875746 DOI: 10.14814/phy2.15555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 12/14/2022] [Accepted: 12/14/2022] [Indexed: 06/17/2023] Open
Abstract
There is evidence supporting that acute sprint interval training (SIT) might improve metabolic responses to postprandial glucose, but results are inconclusive. The aim of the present study was to explore the effects of acute SIT on metabolic response and substrate utilization in individuals with overweight/obesity after an oral 75-gram glucose challenge. Thirty-three participants with overweight/ obesity (32.7 ± 8.3 years, 24 male, 9 female) participated in the study and a crossover design was followed. After the 75-gram glucose load, participants were randomly allocated to two groups: no exercise (resting) or SIT protocol. Metabolic data including respiratory quotient (RQ) and substrate utilization rates (fats and carbohydrates) were collected using the COSMED Q-NRG + ® calorimeter. The RQ was significantly lower in the acute SIT group (0.76 [0.01]; p < 0.0001) than in the resting group (0.80 [0.01]; p = 0.036) at the 120-min postprandial time point, and the RQ area under the curve (AUC) was also lower in the SIT group (mean difference of -6.62, 95% CI -12.00 to -1.24; p = 0.0161). The contribution of fat to energy expenditure increased after SIT during the postprandial period whereas the contribution of carbohydrates decreased. The AUC for fat contribution was significantly higher (mean difference 2311.9, 95% confidence interval [CI] 578.8 to 4043.3; p = 0.0098) and the AUC for carbohydrate contribution was significantly lower (mean difference -2283.1, 95% CI -4040.2 to -527.1; p = 0.0117) in the SIT group than in the resting group. In conclusions, acute SIT might have a positive effect on metabolic responses to postprandial glucose and, accordingly, should be recommended for improving metabolism in people with overweight/obesity.
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Affiliation(s)
- Hugo Alejandro Carrillo‐Arango
- Grupo de Investigación en Deporte de Rendimiento (GRINDER), Programa de Educación Física y DeporteUniversidad del ValleCaliColombia
| | - Miguel Alejandro Atencio‐Osorio
- Grupo de Investigación en Deporte de Rendimiento (GRINDER), Programa de Educación Física y DeporteUniversidad del ValleCaliColombia
| | - Carlos Alejandro López‐Álban
- Grupo de Investigación en Deporte de Rendimiento (GRINDER), Programa de Educación Física y DeporteUniversidad del ValleCaliColombia
- Zoe H&F Centro Para la Investigación En Salud y Rendimiento HumanoCaliColombia
| | - Edna J. Nava‐González
- Facultad de Salud Pública y NutriciónUniversidad Autónoma de Nuevo LeónMonterrey, Nuevo LeónMéxico
| | - María Correa‐Rodríguez
- Department of Nursing, Faculty of Health SciencesUniversity of GranadaGranadaSpain
- Biosanitary Research Institute (ibs.GRANADA)GranadaSpain
| | - Mikel Izquierdo
- Navarrabiomed, Hospital Universitario de Navarra (HUN), Universidad Pública de Navarra (UPNA), Instituto de Investigación Sanitaria de Navarra (IdiSNA)PamplonaEspaña
- CIBER of Frailty and Healthy Aging (CIBERFES)Instituto de Salud Carlos IIIMadridSpain
| | - Robinson Ramírez‐Vélez
- Navarrabiomed, Hospital Universitario de Navarra (HUN), Universidad Pública de Navarra (UPNA), Instituto de Investigación Sanitaria de Navarra (IdiSNA)PamplonaEspaña
- CIBER of Frailty and Healthy Aging (CIBERFES)Instituto de Salud Carlos IIIMadridSpain
- Facultad de Ciencias de la EducaciónUnidad Central del Valle del Cauca (UCEVA)TúluaColombia
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Oliveira DBOD, Cunha GA, Giandoni MA, Carvalho PCDJ, Bonfim GF, Leopoldo APL, Leopoldo AS, Sugizaki MM. HIBISCUS INCREASES FUNCTIONAL CAPACITY AND THE ANTI-OBESITY EFFECT IN TRAINED OBESE RATS. REV BRAS MED ESPORTE 2023. [DOI: 10.1590/1517-8692202329012022_0119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT Introduction Hibiscus sabdariffa (Hs) has been widely used for weight loss and in the fight against obesity-associated comorbidities. Objective To evaluate the effects of Hs and physical training on the functional capacity of normal-weight and obese rats. Methods Wistar rats were distributed into eight experimental groups: control (C, n = 8) , Hibiscus Sabdariffa (Hs, n = 8), high-intensity interval training (IT, n = 8), high-intensity interval training + Hibiscus Sabdariffa (ITHs, n = 8), obese (O, n = 8), obese + continuous aerobic training (OAT, n = 8), obese + Hibiscus Sabdariffa (OHs, n = 8), , and obese + continuous aerobic training + Hibiscus Sabdariffa (OATHs, n = 8). Hibiscus Sabdariffa extract was administered for 60 days in a dose of 150 mg/kg of body weight. The maximum progressive effort test (MPET) was performed on a treadmill at the beginning and end of the study. The variables analyzed were maximum speed Vmáx time, and distance covered. Lactate was measured immediately after the MPET. Functional capacity was evaluated by the distance/adiposity index. The ANOVA with Bonferroni post hoc and Pearson’s correlation tests were used at a 5% significance level. Results After both types of training, moderate-intensity continuous and high-intensity interval performed on the treadmill, final body weight, weight gain, and the adiposity index decreased, and Vmax, time, and distance covered in the MPET increased, in addition to an improvement in functional capacity. Hs supplementation reduced the adiposity index in normal-weight and obese rats. Hs associated with aerobic training reduced final body weight and increased functional capacity. Conclusion Hs supplementation promoted a reduction in the adiposity index in normal-weight and obese rats and an increase in the functional capacity of trained obese rats. Level of Evidence III; Therapeutic Studies - Outcome Investigation. Case study – control.
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Islam H, Gillen JB. Skeletal muscle mechanisms contributing to improved glycemic control following intense interval exercise and training. SPORTS MEDICINE AND HEALTH SCIENCE 2023; 5:20-28. [PMID: 36994179 PMCID: PMC10040385 DOI: 10.1016/j.smhs.2023.01.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 01/07/2023] [Accepted: 01/11/2023] [Indexed: 01/26/2023] Open
Abstract
High-intensity and sprint interval training (HIIT and SIT, respectively) enhance insulin sensitivity and glycemic control in both healthy adults and those with cardiometabolic diseases. The beneficial effects of intense interval training on glycemic control include both improvements seen in the hours to days following a single session of HIIT/SIT and those which accrue with chronic training. Skeletal muscle is the largest site of insulin-stimulated glucose uptake and plays an integral role in the beneficial effects of exercise on glycemic control. Here we summarize the skeletal muscle responses that contribute to improved glycemic control during and following a single session of interval exercise and evaluate the relationship between skeletal muscle remodelling and improved insulin sensitivity following HIIT/SIT training interventions. Recent evidence suggests that targeting skeletal muscle mechanisms via nutritional interventions around exercise, particularly with carbohydrate manipulation, can enhance the acute glycemic benefits of HIIT. There is also some evidence of sex-based differences in the glycemic benefits of intense interval exercise, with blunted responses observed after training in females relative to males. Differences in skeletal muscle metabolism between males and females may contribute to sex differences in insulin sensitivity following HIIT/SIT, but well-controlled studies evaluating purported muscle mechanisms alongside measurement of insulin sensitivity are needed. Given the greater representation of males in muscle physiology literature, there is also a need for more research involving female-only cohorts to enhance our basic understanding of how intense interval training influences muscle insulin sensitivity in females across the lifespan.
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Jabardo-Camprubí G, Bort-Roig J, Donat-Roca R, Milà-Villarroel R, Sitjà-Rabert M, McKenna J, Puig-Ribera A. A socio-ecological approach to reduce the physical activity drop-out ratio in primary care-based patients with type 2 diabetes: the SENWI study protocol for a randomized control trial. Trials 2022; 23:842. [PMID: 36192800 PMCID: PMC9531392 DOI: 10.1186/s13063-022-06742-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 09/13/2022] [Indexed: 12/02/2022] Open
Abstract
Background Physical activity (PA) is a key behaviour for patients with type 2 diabetes (T2DM). However, healthcare professionals’ (HCP) recommendations (walking advice), which are short-term and individually focused, did not reduce the PA drop-out ratio in the long run. Using a socio-ecological model approach may contribute to reducing patient dropout and improving adherence to PA. The aim of this study is threefold: first, to evaluate the effectiveness of a theory-driven Nordic walking intervention using a socio-ecological approach with T2DM patients in Spain; second, to explore the feasibility on the PA adherence process in T2DM patients while participating in the SENWI programme; and third, to understand the HCPs’ opinion regarding its applicability within the Spanish healthcare system. Methods A three-arm randomized control trial (n = 48 each group) will assess the efficacy of two primary care-based PA interventions (Nordic walking vs. Nordic walking plus socio-ecological approach; two sessions per week for twelve weeks) compared to a control group (usual HCPs’ walking advice on PA). Inclusion criteria will include physically inactive patients with T2DM, older than 40 years and without health contraindications to do PA. PA levels and drop-out ratio, quality of life and metabolic and health outcomes will be assessed at baseline, post-intervention and at 9- and 21-month follow-ups. The effect of the different interventions will be assessed by a two-factor analysis of variance: treatment group vs time. Also, a two-factor ANOVA test will be performed with linear mixed models for repeated measures. A qualitative analysis using focus groups will explore the reasons for the (in)effectiveness of the new PA interventions. Qualitative outcomes will be assessed at post-intervention using thematic analysis. Discussion Compared with the general PA walking advice and Nordic walking prescriptions, integrating a socio-ecological approach into Spanish primary care visits could be an effective way to reduce the PA drop-out ratio and increase PA levels in patients with T2DM. Such interventions are necessary to understand the role that multiple socio-complex process in day-to-day PA behaviour has in patients with T2DM in the Spanish context. Trial registration ClinicalTrials.gov NCT05159089. Physical Activity Drop-out Ratio in Patients’ Living with Type 2 Diabetes. Prospectively registered on 15 December 2021. Supplementary Information The online version contains supplementary material available at 10.1186/s13063-022-06742-7.
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Affiliation(s)
- Guillem Jabardo-Camprubí
- Sports and Physical Activity Research Group, Centre for Health and Social Research, University of Vic-Central University of Catalonia, Sagrada Familia 7, Barcelona, VIC, Spain.
| | - Judit Bort-Roig
- Sports and Physical Activity Research Group, Centre for Health and Social Research, University of Vic-Central University of Catalonia, Sagrada Familia 7, Barcelona, VIC, Spain
| | - Rafel Donat-Roca
- School of Health Science UManresa, Sport Exercise and Human Movement (SEaMH), University of Vic-Central University of Catalonia, Av. Universitaria 4-6, Manresa, Spain
| | - Raimon Milà-Villarroel
- School of Health Science Blanquerna, Ramon Llull University, Padilla, 326-332, Barcelona, Spain
| | - Mercè Sitjà-Rabert
- School of Health Science Blanquerna, Global Research on Wellbeing (GRoW) Research Group, Ramon Llull University, Padilla, 326-332, Barcelona, Spain
| | - Jim McKenna
- School of Sport, Leeds Becket University, Leeds, LS1 3HE, Leeds, England
| | - Anna Puig-Ribera
- Sports and Physical Activity Research Group, Centre for Health and Social Research, University of Vic-Central University of Catalonia, Sagrada Familia 7, Barcelona, VIC, Spain
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Santos IK, Pichini GS, Daniel d. Ferreira C, Dantas PB, Browne RAV, de Queiros V, Soares GM, Gonçalves AK, Cabral BG, Maranhão TMO, Dantas PMS. Effects of high-intensity interval training in combination with detraining on mental health in women with polycystic ovary syndrome: A randomized controlled trial. Front Physiol 2022; 13:948414. [PMID: 36246128 PMCID: PMC9556821 DOI: 10.3389/fphys.2022.948414] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 09/01/2022] [Indexed: 11/13/2022] Open
Abstract
This study aimed to investigate the effects of high-intensity interval training (HIIT) and detraining on the quality of life and mental health of 23 women with polycystic ovary syndrome (PCOS). Participants were randomly assigned to the HIIT group (n = 12) [26.0 ± 3.92] and the control group (n = 11) [26.6 ± 4.68]. HIIT sessions comprised 40–60 min, 3 days a week for 12 weeks, followed by detraining for 30 days. We assessed the quality of life using the Short Form Health Survey (SF-36) and mental health by the Depression, Anxiety, and Stress Scale (DASS-21), and we compared group changes on these variables at three time points: 1) at baseline, 2) after 12 weeks of HIIT (or no training), and 3) after 30 days of detraining (or no training). The participants were classified as overweight and had a high percentage of body fat (41.5%) and irregular menstrual cycles (amenorrhea) (66.7%). Throughout training, participants in the HIIT group reported improvements in domains of the quality of life: functional capacity (M = 80.4 ± 3.4 vs. M = 87.0 ± 3.1), physical role functioning (M = 72.5 ± 9.4 vs. M = 81.8 ± 9.7), and general health perception (M = 48.6 ± 4.6 vs. M = 69.0 ± 5.8). Regarding anxiety symptoms (M = 6.4 ± 1.6 vs. M = 3.7 ± 0.7) and depression symptoms (M = 6.7 ± 1.6 vs. M = 3.8 ± 0.9), those reduced significantly after HIIT. After a 30-day detraining period, there was an increase in the significant change in the quality of life; however, domains of mental health showed instability. In summary, the HIIT program promoted improvements in the quality of life and mental health in women with PCOS. The 30 days of detraining changed the benefits in the quality of life and stability in the changes in mental health domains.
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Youssef L, Granet J, Marcangeli V, Dulac M, Hajj-Boutros G, Reynaud O, Buckinx F, Gaudreau P, Morais JA, Mauriège P, Gouspillou G, Noirez P, Aubertin-Leheudre M. Clinical and Biological Adaptations in Obese Older Adults Following 12-Weeks of High-Intensity Interval Training or Moderate-Intensity Continuous Training. Healthcare (Basel) 2022; 10:healthcare10071346. [PMID: 35885872 PMCID: PMC9315493 DOI: 10.3390/healthcare10071346] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 07/16/2022] [Accepted: 07/18/2022] [Indexed: 12/30/2022] Open
Abstract
Sarcopenia and obesity are considered a double health burden. Therefore, the implementation of effective strategies is needed to improve the quality of life of older obese individuals. The aim of this study was to compare the impact of high-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) on functional capacities, muscle function, body composition and blood biomarkers in obese older adults. Adipose tissue gene expression and markers of muscle mitochondrial content and quality control involved in exercise adaptations were also investigated. Sixty-eight participants performed either HIIT (n = 34) on an elliptical trainer or MICT (n = 34) on a treadmill, three times per week for 12 weeks. HIIT produced significantly higher benefits on some physical parameters (six-minute walking test (HIIT: +12.4% vs. MICT: +5.2%); step test (HIIT: +17.02% vs. MICT: +5.9%); ten-repetition chair test (HIIT: −17.04% vs. MICT: −4.7%)). Although both HIIT and MICT led to an improvement in lower limb power (HIIT: +25.2% vs. MICT: +20.4%), only MICT led to higher improvement in lower limb muscle strength (HIIT: +4.3% vs. MICT: +23.2%). HIIT was more beneficial for increasing total lean body mass (HIIT: +1.58% vs. MICT: −0.81%), while MICT was more effective for decreasing relative gynoid fat mass (HIIT: −1.09% vs. MICT: −4.20%). Regarding adipose tissue gene expression, a significant change was observed for cell death-inducing DFFA (DNA fragmentation factor-alpha)-like effector A (CIDEA) in the HIIT group (A.U; HIIT at T0: 32.10 ± 39.37 vs. HIIT at T12: 48.2 ± 59.2). Mitochondrial transcription factor A (TFAM) content, a marker of mitochondrial biogenesis, increased significantly following HIIT (+36.2%) and MICT (+57.2%). A significant increase was observed in the HIIT group for Translocase of Outer Membrane 20 (TOM20; +54.1%; marker of mitochondrial content), Mitofusin-2 (MFN2; +71.6%; marker of mitochondrial fusion) and Parkin RBR E3 Ubiquitin Protein Ligase (PARKIN; +42.3%; marker of mitophagy). Overall, our results indicate that even though MICT (walking on treadmill) and HIIT (on an elliptical) are effective intervention strategies in obese older adults, HIIT appears to have slightly more beneficial effects. More specifically, HIIT led to higher improvements than MICT on functional capacities, lean mass and skeletal muscle markers of mitochondrial content, fusion, and mitophagy. Thus, MICT but also HIIT (time-efficient training) could be recommended as exercise modalities for obese older adults to maintain or improve mobility, health and quality of life.
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Affiliation(s)
- Layale Youssef
- École de Kinésiologie et des Sciences de l’Activité Physique, Université de Montréal, Montreal, QC H3T 1J4, Canada;
- Centre de Recherche de l’Institut, Universitaire de Gériatrie de Montréal, Montreal, QC H3W 1W5, Canada; (J.G.); (F.B.); (G.G.)
| | - Jordan Granet
- Centre de Recherche de l’Institut, Universitaire de Gériatrie de Montréal, Montreal, QC H3W 1W5, Canada; (J.G.); (F.B.); (G.G.)
- Département des Sciences Biologiques, Faculté des Sciences, Université du Québec à Montréal, Montreal, QC H2X 1Y4, Canada; (V.M.); (M.D.); (O.R.)
- Département des Sciences de l’Activité Physique, Faculté des Sciences, Université du Québec à Montréal, Montreal, QC H2X 1Y4, Canada
| | - Vincent Marcangeli
- Département des Sciences Biologiques, Faculté des Sciences, Université du Québec à Montréal, Montreal, QC H2X 1Y4, Canada; (V.M.); (M.D.); (O.R.)
- Département des Sciences de l’Activité Physique, Faculté des Sciences, Université du Québec à Montréal, Montreal, QC H2X 1Y4, Canada
| | - Maude Dulac
- Département des Sciences Biologiques, Faculté des Sciences, Université du Québec à Montréal, Montreal, QC H2X 1Y4, Canada; (V.M.); (M.D.); (O.R.)
- Department of Medicine, Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada; (G.H.-B.); (J.A.M.)
| | - Guy Hajj-Boutros
- Department of Medicine, Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada; (G.H.-B.); (J.A.M.)
| | - Olivier Reynaud
- Département des Sciences Biologiques, Faculté des Sciences, Université du Québec à Montréal, Montreal, QC H2X 1Y4, Canada; (V.M.); (M.D.); (O.R.)
- Département des Sciences de l’Activité Physique, Faculté des Sciences, Université du Québec à Montréal, Montreal, QC H2X 1Y4, Canada
| | - Fanny Buckinx
- Centre de Recherche de l’Institut, Universitaire de Gériatrie de Montréal, Montreal, QC H3W 1W5, Canada; (J.G.); (F.B.); (G.G.)
- Département des Sciences de l’Activité Physique, Faculté des Sciences, Université du Québec à Montréal, Montreal, QC H2X 1Y4, Canada
| | - Pierrette Gaudreau
- Centre de Recherche du Centre Hospitalier de l’Université de Montréal, Montréal, QC H2X 3E4, Canada;
| | - José A. Morais
- Department of Medicine, Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada; (G.H.-B.); (J.A.M.)
| | - Pascale Mauriège
- Centre de Recherche de l’Institut Universitaire de Cardiologie et Pneumologie de Québec, Université Laval, Quebec City, QC G1V 4G5, Canada;
- Département de Kinésiologie, Université Laval, Quebec City, QC G1V 0A6, Canada
| | - Gilles Gouspillou
- Centre de Recherche de l’Institut, Universitaire de Gériatrie de Montréal, Montreal, QC H3W 1W5, Canada; (J.G.); (F.B.); (G.G.)
- Département des Sciences de l’Activité Physique, Faculté des Sciences, Université du Québec à Montréal, Montreal, QC H2X 1Y4, Canada
- Department of Medicine, Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada; (G.H.-B.); (J.A.M.)
- Groupe de Recherche en Activité Physique Adaptée, Montreal, QC H2X 1Y4, Canada
| | - Philippe Noirez
- Département des Sciences de l’Activité Physique, Faculté des Sciences, Université du Québec à Montréal, Montreal, QC H2X 1Y4, Canada
- PSMS, UFR STAPS, Université de Reims Champagne Ardenne, 51100 Reims, France
- T3S, Inserm, Université Paris Cité, 75006 Paris, France
- Institut de Recherche Médicale et d’Épidémiologie du Sport (IRMES), INSEP, Université Paris Cité, 75012 Paris, France
- Correspondence: (P.N.); (M.A.-L.)
| | - Mylène Aubertin-Leheudre
- École de Kinésiologie et des Sciences de l’Activité Physique, Université de Montréal, Montreal, QC H3T 1J4, Canada;
- Centre de Recherche de l’Institut, Universitaire de Gériatrie de Montréal, Montreal, QC H3W 1W5, Canada; (J.G.); (F.B.); (G.G.)
- Département des Sciences de l’Activité Physique, Faculté des Sciences, Université du Québec à Montréal, Montreal, QC H2X 1Y4, Canada
- Groupe de Recherche en Activité Physique Adaptée, Montreal, QC H2X 1Y4, Canada
- Correspondence: (P.N.); (M.A.-L.)
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Atakan MM, Guzel Y, Shrestha N, Kosar SN, Grgic J, Astorino TA, Turnagol HH, Pedisic Z. Effects of high-intensity interval training (HIIT) and sprint interval training (SIT) on fat oxidation during exercise: a systematic review and meta-analysis. Br J Sports Med 2022; 56:bjsports-2021-105181. [PMID: 35859145 DOI: 10.1136/bjsports-2021-105181] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/26/2022] [Indexed: 12/13/2022]
Abstract
OBJECTIVE To investigate the effects of high-intensity interval training (HIIT) and sprint interval training (SIT) on fat oxidation during exercise (FatOx) and how they compare with the effects of moderate-intensity continuous training (MICT). DESIGN Systematic review and meta-analysis. DATA SOURCES Academic Search Ultimate, CINAHL, Networked Digital Library of Theses and Dissertations, Open Access Theses and Dissertations, OpenDissertations, PubMed/MEDLINE, Scopus, SPORTDiscus and Web of Science. ELIGIBILITY CRITERIA FOR SELECTING STUDIES Studies using a between-group design, involving adult participants who were not trained athletes, and evaluating effects of HIIT or SIT on FatOx (vs no exercise or MICT) were included. RESULTS Eighteen studies of fair-to-good quality were included; nine comparing HIIT or SIT with no exercise and eleven comparing HIIT or SIT with MICT. A significant pooled effect of these types of interval training on FatOx was found (mean difference in g/min (MD)=0.08; 95% confidence interval (CI) 0.04 to 0.12; p<0.001). Significant effects were found for exercise regimens lasting ≥4 weeks, and they increased with every additional week of training (β=0.01; 95% CI 0.00 to 0.02; p=0.003). HIIT and/or SIT were slightly more effective than MICT (MD=0.03; 95% CI 0.01 to 0.05; p=0.005). The effects on FatOx were larger among individuals with overweight/obesity. CONCLUSION Engaging in HIIT or SIT can improve FatOx, with larger effects expected for longer training regimens and individuals with overweight/obesity. While some effects seem small, they may be important in holistic approaches to enhance metabolic health and manage obesity.
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Affiliation(s)
- Muhammed M Atakan
- Division of Exercise Nutrition and Metabolism, Faculty of Sport Sciences, Hacettepe University, Ankara, Turkey
| | - Yasemin Guzel
- Division of Exercise Nutrition and Metabolism, Faculty of Sport Sciences, Hacettepe University, Ankara, Turkey
| | - Nipun Shrestha
- Evidence Integration, NHMRC Clinical Trials Centre, The University of Sydney, Sydney, New South Wales, Australia
| | - Sukran N Kosar
- Division of Exercise Nutrition and Metabolism, Faculty of Sport Sciences, Hacettepe University, Ankara, Turkey
| | - Jozo Grgic
- Institute for Health and Sport, Victoria University, Melbourne, Victoria, Australia
| | - Todd A Astorino
- Department of Kinesiology, California State University-San Marcos, San Marcos, California, USA
| | - Huseyin H Turnagol
- Division of Exercise Nutrition and Metabolism, Faculty of Sport Sciences, Hacettepe University, Ankara, Turkey
| | - Zeljko Pedisic
- Institute for Health and Sport, Victoria University, Melbourne, Victoria, Australia
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Atakan MM, Koşar ŞN, Turnagöl HH. Six sessions of low-volume high-intensity interval exercise improves resting fat oxidation. Int J Sports Med 2022; 43:1206-1213. [PMID: 35858638 DOI: 10.1055/a-1905-7985] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
It remains unclear whether a practical model of low-volume high-intensity interval exercise improves resting fat oxidation (FatOx) which is associated with metabolic health. We aimed to determine the effects of a short-term practical model of high-intensity interval training (HIIT) on resting FatOx in young, healthy males. Thirty healthy males were randomly assigned to either single (HIITsingle; n=13) or double HIIT (HIITdouble; n=17) group. The HIITsingle group trained once a day, 3 days/week for 2 weeks, whilst the HIITdouble group performed 6 sessions of high-intensity exercise over 5 days by exercising twice a day every second day. Both groups completed 6 high-intensity exercise sessions consisting of 10×60 s of cycling at peak power output, interspersed by 75 s cycling at 60 W. With 1% false discovery rate (FDR) significance threshold, resting respiratory exchange ratio similarly decreased in HIITsingle (pre=0.83±0.03 vs post=0.80±0.03) and HIITdouble group (pre=0.82±0.04 vs post=0.80±0.02) [(p=0.001; partial eta squared () =0.310, FDR-adjusted p value=0.005)]. Resting FatOx increased similarly in HIITsingle (pre=1.07±0.39 mg·kg-1 fat free mass (FFM)·min-1 vs post=1.44±0.36 mg·kg-1 FFM·min-1) and HIITdouble group (pre=1.35±0.45 mg·kg-1 FFM·min-1 vs post=1.52±0.29 mg·kg-1 FFM·min-1) [(p<0.001; =0.411, FDR-adjusted p value=0.005)]. Our results demonstrate that only six sessions of a practical model of low-volume high-intensity exercise improves resting FatOx in young, healthy males.
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Affiliation(s)
- Muhammed Mustafa Atakan
- Faculty of Sport Sciences, Division of Nutrition and Metabolism in Exercise, Hacettepe Universitesi, Ankara, Turkey
| | - Şükran Nazan Koşar
- Division of Exercise Nutrition and Metabolism, Faculty of Sport Sciences, Hacettepe Universitesi, Ankara, Turkey
| | - Hüseyin Hüsrev Turnagöl
- Division of Exercise Nutrition and Metabolism, Faculty of Sport Sciences, Hacettepe Universitesi, Ankara, Turkey
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Hastings MH, Herrera JJ, Guseh JS, Atlason B, Houstis NE, Abdul Kadir A, Li H, Sheffield C, Singh AP, Roh JD, Day SM, Rosenzweig A. Animal Models of Exercise From Rodents to Pythons. Circ Res 2022; 130:1994-2014. [PMID: 35679366 PMCID: PMC9202075 DOI: 10.1161/circresaha.122.320247] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Acute and chronic animal models of exercise are commonly used in research. Acute exercise testing is used, often in combination with genetic, pharmacological, or other manipulations, to study the impact of these manipulations on the cardiovascular response to exercise and to detect impairments or improvements in cardiovascular function that may not be evident at rest. Chronic exercise conditioning models are used to study the cardiac phenotypic response to regular exercise training and as a platform for discovery of novel pathways mediating cardiovascular benefits conferred by exercise conditioning that could be exploited therapeutically. The cardiovascular benefits of exercise are well established, and, frequently, molecular manipulations that mimic the pathway changes induced by exercise recapitulate at least some of its benefits. This review discusses approaches for assessing cardiovascular function during an acute exercise challenge in rodents, as well as practical and conceptual considerations in the use of common rodent exercise conditioning models. The case for studying feeding in the Burmese python as a model for exercise-like physiological adaptation is also explored.
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Affiliation(s)
- Margaret H Hastings
- Department of Medicine, Division of Cardiology, Cardiovascular Research Center, Corrigan Minehan Heart Center, Massachusetts General Hospital, Harvard Medical School, Boston (M.H.H., J.S.G., B.A., N.E.H., A.A.K., H.L., C.S., A.P.S., J.D.R., A.R.)
| | - Jonathan J Herrera
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor (J.J.H.)
| | - J Sawalla Guseh
- Department of Medicine, Division of Cardiology, Cardiovascular Research Center, Corrigan Minehan Heart Center, Massachusetts General Hospital, Harvard Medical School, Boston (M.H.H., J.S.G., B.A., N.E.H., A.A.K., H.L., C.S., A.P.S., J.D.R., A.R.)
| | - Bjarni Atlason
- Department of Medicine, Division of Cardiology, Cardiovascular Research Center, Corrigan Minehan Heart Center, Massachusetts General Hospital, Harvard Medical School, Boston (M.H.H., J.S.G., B.A., N.E.H., A.A.K., H.L., C.S., A.P.S., J.D.R., A.R.)
| | - Nicholas E Houstis
- Department of Medicine, Division of Cardiology, Cardiovascular Research Center, Corrigan Minehan Heart Center, Massachusetts General Hospital, Harvard Medical School, Boston (M.H.H., J.S.G., B.A., N.E.H., A.A.K., H.L., C.S., A.P.S., J.D.R., A.R.)
| | - Azrul Abdul Kadir
- Department of Medicine, Division of Cardiology, Cardiovascular Research Center, Corrigan Minehan Heart Center, Massachusetts General Hospital, Harvard Medical School, Boston (M.H.H., J.S.G., B.A., N.E.H., A.A.K., H.L., C.S., A.P.S., J.D.R., A.R.)
| | - Haobo Li
- Department of Medicine, Division of Cardiology, Cardiovascular Research Center, Corrigan Minehan Heart Center, Massachusetts General Hospital, Harvard Medical School, Boston (M.H.H., J.S.G., B.A., N.E.H., A.A.K., H.L., C.S., A.P.S., J.D.R., A.R.)
| | - Cedric Sheffield
- Department of Medicine, Division of Cardiology, Cardiovascular Research Center, Corrigan Minehan Heart Center, Massachusetts General Hospital, Harvard Medical School, Boston (M.H.H., J.S.G., B.A., N.E.H., A.A.K., H.L., C.S., A.P.S., J.D.R., A.R.)
| | - Anand P Singh
- Department of Medicine, Division of Cardiology, Cardiovascular Research Center, Corrigan Minehan Heart Center, Massachusetts General Hospital, Harvard Medical School, Boston (M.H.H., J.S.G., B.A., N.E.H., A.A.K., H.L., C.S., A.P.S., J.D.R., A.R.)
| | - Jason D Roh
- Department of Medicine, Division of Cardiology, Cardiovascular Research Center, Corrigan Minehan Heart Center, Massachusetts General Hospital, Harvard Medical School, Boston (M.H.H., J.S.G., B.A., N.E.H., A.A.K., H.L., C.S., A.P.S., J.D.R., A.R.)
| | - Sharlene M Day
- Cardiovascular Medicine, Perelman School of Medicine' University of Pennsylvania, Philadelphia (S.M.D.)
| | - Anthony Rosenzweig
- Department of Medicine, Division of Cardiology, Cardiovascular Research Center, Corrigan Minehan Heart Center, Massachusetts General Hospital, Harvard Medical School, Boston (M.H.H., J.S.G., B.A., N.E.H., A.A.K., H.L., C.S., A.P.S., J.D.R., A.R.)
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Liu QQ, Xie WQ, Luo YX, Li YD, Huang WH, Wu YX, Li YS. High Intensity Interval Training: A Potential Method for Treating Sarcopenia. Clin Interv Aging 2022; 17:857-872. [PMID: 35656091 PMCID: PMC9152764 DOI: 10.2147/cia.s366245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 05/14/2022] [Indexed: 11/23/2022] Open
Abstract
Sarcopenia, an age-related disease characterized by loss of muscle strength and muscle mass, has attracted the attention of medical experts due to its severe morbidity, low living quality, high expenditure of health care, and mortality. Traditionally, persistent aerobic exercise (PAE) is considered as a valid way to attenuate muscular atrophy. However, nowadays, high intensity interval training (HIIT) has emerged as a more effective and time-efficient method to replace traditional exercise modes. HIIT displays comprehensive effects on exercise capacity and skeletal muscle metabolism, and it provides a time-out for the recovery of cardiopulmonary and muscular functions without causing severe adverse effects. Studies demonstrated that compared with PAE, HIIT showed similar or even higher effects in improving muscle strength, enhancing physical performances and increasing muscle mass of elder people. Therefore, HIIT might become a promising way to cope with the age-related loss of muscle mass and muscle function. However, it is worth mentioning that no study of HIIT was conducted directly on sarcopenia patients, which is attributed to the suspicious of safety and validity. In this review, we will assess the effects of different training parameters on muscle and sarcopenia, summarize previous papers which compared the effects of HIIT and PAE in improving muscle quality and function, and evaluate the potential of HIIT to replace the status of PAE in treating old people with muscle atrophy and low modality; and point out drawbacks of temporary experiments. Our aim is to discuss the feasibility of HIIT to treat sarcopenia and provide a reference for clinical scientists who want to utilize HIIT as a new way to cope with sarcopenia.
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Affiliation(s)
- Qian-Qi Liu
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People’s Republic of China
- Xiangya School of Medicine, Central South University, Changsha, Hunan, 410083, People’s Republic of China
| | - Wen-Qing Xie
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People’s Republic of China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People’s Republic of China
| | - Yu-Xuan Luo
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People’s Republic of China
- Xiangya School of Medicine, Central South University, Changsha, Hunan, 410083, People’s Republic of China
| | - Yi-Dan Li
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People’s Republic of China
- Xiangya School of Medicine, Central South University, Changsha, Hunan, 410083, People’s Republic of China
| | - Wei-Hong Huang
- Mobile Health Ministry of Education - China Mobile Joint Laboratory, Xiangya Hospital Central South University, Changsha, Hunan, 410008, People’s Republic of China
| | - Yu-Xiang Wu
- Department of Health and Kinesiology, School of Physical Education, Jianghan University, Wuhan, Hubei, 430056, People’s Republic of China
- Yu-Xiang Wu, Department of Health and Kinesiology, School of Physical Education, Jianghan University, No. 8, Sanjiaohu Road, Wuhan, Hubei, 430056, People’s Republic of China, Tel +86 27 8422 6921, Email
| | - Yu-Sheng Li
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People’s Republic of China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People’s Republic of China
- Correspondence: Yu-Sheng Li, Department of Orthopedics, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan, 410008, People’s Republic of China, Tel +86-13975889696, Email
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Influence of Baseline CT Body Composition Parameters on Survival in Patients with Pancreatic Adenocarcinoma. J Clin Med 2022; 11:jcm11092356. [PMID: 35566483 PMCID: PMC9105849 DOI: 10.3390/jcm11092356] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 04/20/2022] [Accepted: 04/21/2022] [Indexed: 01/06/2023] Open
Abstract
Pancreatic cancer is the seventh leading cause of cancer death in both sexes. The aim of this study is to analyze baseline CT body composition using artificial intelligence to identify possible imaging predictors of survival. We retrospectively included 103 patients. First, the presence of surgical treatment and cut-off values for sarcopenia and obesity served as independent variates. Second, the presence of surgery, subcutaneous adipose tissue (SAT), visceral adipose tissue (VAT), and skeletal muscle index (SMI) served as independent variates. Cox regression analysis was performed for 1-year, 2-year, and 3-year survival. Possible differences between patients undergoing surgical versus nonsurgical treatment were analyzed. Presence of surgery significantly predicted 1-year, 2-year, and 3-year survival (p = 0.01, <0.001, and <0.001, respectively). Across the follow-up periods of 1-year, 2-year, and 3-year survival, the presence of sarcopenia became an equally important predictor of survival (p = 0.25, 0.07, and <0.001, respectively). Additionally, increased VAT predicted 2-year and 3-year survival (p = 0.02 and 0.04, respectively). The impact of sarcopenia on 3-year survival was higher in the surgical treatment group (p = 0.02 and odds ratio = 2.57) compared with the nonsurgical treatment group (p = 0.04 and odds ratio = 1.92). Fittingly, a lower SMI significantly affected 3-year survival only in patients who underwent surgery (p = 0.02). Especially if surgery is performed, AI-derived sarcopenia and reduced muscle mass are unfavorable imaging predictors.
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Johansson MS, Holtermann A, Marott JL, Prescott E, Schnohr P, Korshøj M, Søgaard K. The physical activity health paradox and risk factors for cardiovascular disease: A cross-sectional compositional data analysis in the Copenhagen City Heart Study. PLoS One 2022; 17:e0267427. [PMID: 35446893 PMCID: PMC9022831 DOI: 10.1371/journal.pone.0267427] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 04/09/2022] [Indexed: 12/03/2022] Open
Abstract
Background Studies indicate that physical activity during leisure and work have opposite associations with cardiovascular disease (CVD) risk factors, referred to as the physical activity health paradox. We investigated how sedentary behaviour and physical activity types during leisure and work are associated with systolic blood pressure (SBP), waist circumference (WC), and low-density lipoprotein cholesterol (LDL-C) in an adult general population sample using compositional data analysis. Methods Participants wore accelerometers for 7 days (right thigh and iliac crest; 24 h/day) and had their SBP, WC, and LDL-C measured. Accelerometer data was analysed using the software Acti4 to derive daily time spent in sedentary behaviour and physical activity types. The measure of association was quantified by reallocating time between sedentary behaviour and 1) walking, and 2) high-intensity physical activity (HIPA; sum of climbing stairs, running, cycling, and rowing), during both domains. Results In total, 652 participants were included in the analyses (median wear time: 6 days, 23.8 h/day). During leisure, the results indicated that less sedentary behaviour and more walking or more HIPA was associated with lower SBP, while during work, the findings indicated an association with higher SBP. During both domains, the findings indicated that less sedentary behaviour and more HIPA was associated with a smaller WC and lower LDL-C. However, the findings indicated less sedentary behaviour and more walking to be associated with a larger WC and higher LDL-C, regardless of domain. Conclusions During leisure, less sedentary behaviour and more walking or HIPA seems to be associated with a lower SBP, but, during work, it seems to be associated with a higher SBP. No consistent differences between domains were observed for WC and LDL-C. These findings highlight the importance of considering the physical activity health paradox, at least for some risk factors for CVD.
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Affiliation(s)
- Melker S. Johansson
- Musculoskeletal Disorders and Physical Workload, National Research Centre for the Working Environment, Copenhagen, Denmark
- Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
- * E-mail:
| | - Andreas Holtermann
- Musculoskeletal Disorders and Physical Workload, National Research Centre for the Working Environment, Copenhagen, Denmark
- Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
| | - Jacob L. Marott
- The Copenhagen City Heart Study, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark
| | - Eva Prescott
- The Copenhagen City Heart Study, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark
- Department of Cardiology, Bispebjerg University Hospital, Copenhagen, Denmark
| | - Peter Schnohr
- The Copenhagen City Heart Study, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark
| | - Mette Korshøj
- Musculoskeletal Disorders and Physical Workload, National Research Centre for the Working Environment, Copenhagen, Denmark
- Department of Occupational and Social Medicine, Holbæk Hospital, Holbæk, Denmark
| | - Karen Søgaard
- Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
- Department of Clinical Research, University of Southern Denmark, Odense, Denmark
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Effect of High-Intensity Interval Training Combined with Fasting in the Treatment of Overweight and Obese Adults: A Systematic Review and Meta-Analysis. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19084638. [PMID: 35457507 PMCID: PMC9030367 DOI: 10.3390/ijerph19084638] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 04/05/2022] [Accepted: 04/06/2022] [Indexed: 02/06/2023]
Abstract
Objectives: A systematic review and meta-analysis is conducted to compare the effects of high-intensity interval training (HIIT) combined with fasting (HIIT + fasting) and other interventions (HIIT alone, fasting alone, or normal intervention) in adults with overweight and obesity on body composition (body mass, body mass index (BMI), waist circumference (WC), percent fat mass (PFM), fat mass (FM), fat-free mass (FFM)), maximal oxygen uptake (VO2peak), and glucose metabolism (fasting plasma glucose (FPG)), fasting plasma insulin (FPI)). Methods: The databases of PubMed, the Cochrane Library, Embace, Web of Science, CNKI, Wangfang Data, and CBM were searched from their inception to February 2022. Randomized controlled trials comparing the effects of HIIT + fasting and other interventions on adults with overweight and obesity were included in this meta-analysis. The risk of bias was assessed by the Cochrane risk of bias tool. The effect size was completed by using mean difference (MD) and standard deviation. If there were varying units or large differences among the included studies, the standardized mean difference (SMD) would be used. The certainty of evidence was evaluated using the Grading of Recommendations Assessment, Development, and Evaluation (GRADE). Results: Nine randomized controlled trials with 230 overweight and obese adults were conducted in accordance with our inclusion criteria. The results of the meta-analysis revealed that compared to the control group HIIT + fasting had better effects on the body mass, WC, FM, and VO2peak, while there were no significant differences in PFM, FFM, FPG, and FPI. Conclusions: Despite the number of included trials being small and the GRADE of all outcomes being very low, HIIT + fasting has a positive effect on the body composition of overweight and obese adults, and significantly improves VO2peak. For adults with overweight and obesity who have long-term comorbidity, HIIT + fasting was a better way to improve FPG than HIIT alone or fasting alone. More studies are required to investigate different combinations of HIIT + fasting; and the safety of HIIT + fasting intervention on overweight and obese adults.
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Effects of one-year once-weekly high-intensity interval training on body adiposity and liver fat in adults with central obesity: Study protocol for a randomized controlled trial. J Exerc Sci Fit 2022; 20:161-171. [PMID: 35401766 PMCID: PMC8943247 DOI: 10.1016/j.jesf.2022.03.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 03/10/2022] [Accepted: 03/11/2022] [Indexed: 12/19/2022] Open
Abstract
Objective This study aims to examine the effects of one-year, once-weekly high-intensity interval training (HIIT) on body adiposity and liver fat in adults with central obesity. Methods One-hundred and twenty adults aged 18–60 years with central obesity (body mass index ≥25, waist circumference ≥90 cm for men and ≥80 cm for women). This is an assessor-blinded randomized controlled trial. Participants will be randomly assigned to the HIIT group or the usual care control group. Each HIIT session will consist of 4 × 4-min bouts at 85%–95% maximal heart rate, interspersed with 3-min bouts at 50%–70% maximal heart rate. The HIIT group will complete one session per week for 12 months, whereas the usual care control group will receive health education. The primary outcomes of this study are total body adiposity and intrahepatic triglyceride content. The secondary outcomes include abdominal visceral adipose tissue, subcutaneous adipose tissue, body mass index, waist circumference, hip circumference, cardiorespiratory fitness, lean body mass, bone mineral density, blood pressure, fasting blood glucose, insulin, triglycerides, glycated hemoglobin, cholesterol profile, liver function enzymes, medications, adherence to exercise, adverse events, quality of life, and mental health. Outcome measure will be conducted at baseline, 12 months (post-intervention), and 24 months (one-year follow-up). Impact of the project This study will explore the benefits of long-term once-weekly HIIT with a follow-up period to assess its effectiveness, adherence, and sustainability. We expect this intervention will enhance the practical suitability of HIIT in inactive adults with central obesity, and provide insights on low-frequency HIIT as a novel exercise option for the management of patients with central obesity and liver fat. Trial registration ClinicalTrials.gov (NCT03912272) registered on 11 April 2019.
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