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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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Liu Z, Zheng P, Fang Y, Huang J, Huang J, Chen L, Hu Q, Zou C, Tao J, Chen L. Joint association of sedentary time and physical activity with abnormal heart rate recovery in young and middle-aged adults. BMC Public Health 2024; 24:1787. [PMID: 38965484 PMCID: PMC11225313 DOI: 10.1186/s12889-024-19298-9] [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: 07/07/2023] [Accepted: 06/27/2024] [Indexed: 07/06/2024] Open
Abstract
BACKGROUND Abnormal heart rate recovery (HRR), representing cardiac autonomic dysfunction, is an important predictor of cardiovascular disease. Prolonged sedentary time (ST) is associated with a slower HRR. However, it is not clear how much moderate-to-vigorous physical activity (MVPA) is required to mitigate the adverse effects of sedentary behavior on HRR in young and middle-aged adults. This study aimed to examine the joint association of ST and MVPA with abnormal HRR in this population. METHODS A cross-sectional analysis was conducted on 1253 participants (aged 20-50 years, 67.8% male) from an observational study assessing cardiopulmonary fitness in Fujian Province, China. HRR measured via cardiopulmonary exercise tests on a treadmill was calculated as the difference between heart rate at peak exercise and 2 min after exercise. When the HRR was ≤ 42 beats·minute-1 within this time, it was considered abnormal. ST and MVPA were assessed by the IPAQ-LF. Individuals were classified as having a low sedentary time (LST [< 6 h·day-1]) or high sedentary time (HST [≥ 6 h·day-1]) and according to their MVPA level (low MVPA [0-149 min·week-1], medium MVPA [150-299 min·week-1], high MVPA [≥ 300 min·week-1]). Finally, six ST-MVPA groups were derived. Associations between ST-MVPA groups with abnormal HRR incidence were examined using logistic regression models. RESULTS 53.1% of the young and middle-aged adults had less than 300 min of MVPA per week. In model 2, adjusted for possible confounders (e.g. age, sex, current smoking status, current alcohol consumption, sleep status, body mass index), HST was associated with higher odds of an abnormal HRR compared to LST (odds ratio (OR) = 1.473, 95% confidence interval (CI) = 1.172-1.852). Compared with the reference group (HST and low MVPA), the HST and high MVPA groups have a lower chance of abnormal HRR (OR, 95% CI = 0.553, 0.385-0.795). Compared with individuals with HST and low MVPA, regardless of whether MVPA is low, medium, or high, the odds of abnormal HRR in individuals with LST is significantly reduced (OR, 95% CI = 0.515, 0.308-0.857 for LST and low MVPA; OR, 95% CI = 0.558, 0.345-0.902 for LST and medium MVPA; OR, 95% CI = 0.476, 0.326-0.668 for LST and high MVPA). CONCLUSION Higher amounts of MVPA appears to mitigate the increased odds of an abnormal HRR associated with HST for healthy young and middle-aged adults.
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Affiliation(s)
- Zhizhen Liu
- National-Local Joint Engineering Research Center of Rehabilitation Medicine Technology, Fujian University of Traditional Chinese Medicine, Fuzhou, 350122, China
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, 350122, China
| | - Peiyun Zheng
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, 350122, China
| | - Yong Fang
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, 350122, China
| | - Jie Huang
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, 350122, China
| | - Jia Huang
- National-Local Joint Engineering Research Center of Rehabilitation Medicine Technology, Fujian University of Traditional Chinese Medicine, Fuzhou, 350122, China
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, 350122, China
| | - Liming Chen
- Health Management Center, The Second People's Hospital Affiliated to Fujian University of Chinese Medicine, Fuzhou, 350003, China
| | - Qiaoling Hu
- Health Management Center, The Second People's Hospital Affiliated to Fujian University of Chinese Medicine, Fuzhou, 350003, China
| | - Chunyan Zou
- Health Management Center, The Second People's Hospital Affiliated to Fujian University of Chinese Medicine, Fuzhou, 350003, China
| | - Jing Tao
- National-Local Joint Engineering Research Center of Rehabilitation Medicine Technology, Fujian University of Traditional Chinese Medicine, Fuzhou, 350122, China
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, 350122, China
| | - Lidian Chen
- National-Local Joint Engineering Research Center of Rehabilitation Medicine Technology, Fujian University of Traditional Chinese Medicine, Fuzhou, 350122, China.
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, 350122, China.
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Pérez-Ifrán P, Magallanes CA, de S Castro FA, Astorino TA, Benítez-Flores S. Extremely Low-Volume Burpee Interval Training Equivalent to 8 Minutes Per Session Improves Vertical Jump Compared with Sprint Interval Training in Real-World Circumstances. J Strength Cond Res 2024; 38:10-20. [PMID: 37639674 DOI: 10.1519/jsc.0000000000004603] [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: 08/31/2023]
Abstract
ABSTRACT Pérez-Ifrán, P, Magallanes, CA, de S. Castro, FA, Astorino, TA, and Benítez-Flores, S. Extremely low-volume burpee interval training equivalent to 8 minutes per session improves vertical jump compared with sprint interval training in real-world circumstances. J Strength Cond Res 38(1): 10-20, 2024-The aim of this study was to compare the cardiometabolic and physical effects of 2 time-matched high-intensity programs in a real-world environment. Forty-three active and healthy adults (sex = 31 men and 12 women; age = 27 ± 5 years; peak heart rate [HR peak ] = 190.7 ± 10.6 beat·min -1 ) were randomized to 2 very low-volume protocols (∼8 minutes): sprint interval training (SIT) ( n = 15), burpee interval training (BIT) ( n = 15), and control (CON) ( n = 13). Subjects in SIT and BIT performed 5 days of 10 × 4 second "all-out" efforts with 30 seconds of recovery. Body composition, blood pressure, countermovement jump (CMJ), 10-m sprint, shuttle run test (SRT), autonomic modulation , self-efficacy, and intention were evaluated before and after training. Sprint interval training elicited a higher %HR peak , energy expenditure, rating of perceived exertion category ratio 10 scale, and feeling scale than BIT ( p < 0.05). SRT distance was significantly improved in SIT ( p = 0.03, d = 0.62), whereas CMJ height was significantly enhanced in BIT ( p = 0.0014, d = 0.72). Self-efficacy progressively worsened for SIT than for BIT as sessions increased, and significant differences were found in 5× a week frequency between protocols ( p = 0.040, d = 0.79). No differences in intention to engage were detected between the regimens ( p > 0.05). No changes were observed in body composition, blood pressure, 10-m sprint, SRTV̇O 2max , or autonomic variables with training ( p > 0.05). Results exhibit that extremely low-volume SIT improved running performance, whereas BIT increased the vertical jump.
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Affiliation(s)
- Pablo Pérez-Ifrán
- Department of Physical Education and Health, Higher Institute of Physical Education, University of the Republic, Montevideo, Uruguay
| | - Carlos A Magallanes
- Department of Physical Education and Health, Higher Institute of Physical Education, University of the Republic, Montevideo, Uruguay
| | - Flávio A de S Castro
- Aquatic Sports Research Group, School of Physical Education, Physiotherapy and Dance, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil; and
| | - Todd A Astorino
- Department of Kinesiology, California State University San Marcos, San Marcos, California
| | - Stefano Benítez-Flores
- Department of Physical Education and Health, Higher Institute of Physical Education, University of the Republic, Montevideo, Uruguay
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Matsuo T, So R, Murai F. Estimation methods to detect changes in cardiorespiratory fitness due to exercise training and subsequent detraining. Eur J Appl Physiol 2023; 123:877-889. [PMID: 36550384 DOI: 10.1007/s00421-022-05113-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 12/08/2022] [Indexed: 12/24/2022]
Abstract
PURPOSE To determine whether estimated maximal oxygen consumption ([Formula: see text]) can detect cardiorespiratory fitness (CRF) changes by behavioral modifications. This study compared changes in measured [Formula: see text]O2max (m[Formula: see text]O2max) through exercise intervention with e[Formula: see text]O2max using a multiple regression model (MRM) and linear extrapolation method (LEM). METHODS A cross-sectional analysis involving 173 adults was conducted to establish an MRM by including age, sex, body mass index, questionnaire score, heart rate (HR) from step test, and m[Formula: see text]O2max. Subsequently, 15 men participated in an intervention experiment comprising an 8-week, high-intensity interval training, followed by 8-week detraining, and completed anthropometric measurements, questionnaires, step tests, and m[Formula: see text]O2max tests. m[Formula: see text]O2max changes throughout the intervention were compared to e[Formula: see text]O2max changes calculated using the MRM and LEM. The LEM used the HR during the step test with constant values (predetermined [Formula: see text]O2), such as the Chester step test. RESULTS Inclusion of the step test HR in a questionnaire-based MRM improved the estimation power, although the MRM underestimated higher m[Formula: see text]O2max values. In the intervention, m[Formula: see text]O2max increased by 20.0 ± 14.1% (P < 0.01) and subsequently decreased by 9.5 ± 6.6% (P < 0.01) after exercise training and detraining, respectively. Significant method × time interactions were observed between m[Formula: see text]O2max and e[Formula: see text]O2max in the MRM but not in the LEM, i.e., an apparent systematic error (underestimation of high values) of the MRM was absent in the LEM, although the correlation between m[Formula: see text]O2max and e[Formula: see text]O2max using the LEM was moderate. CONCLUSION e[Formula: see text]O2max, particularly using the MRM with HR as an explanatory factor, is not an appropriate method for detecting CRF changes along with behavioral modifications. CLINICAL TRIAL REGISTRATION Registered number, UMIN000041031; Registered date, 2020/07/08; URL, https://center6.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recptno=R000046855.
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Affiliation(s)
- Tomoaki Matsuo
- Ergonomics Research Group, National Institute of Occupational Safety and Health, Japan, Kawasaki, Japan.
- Research Center for Overwork-Related Disorders, National Institute of Occupational Safety and Health, Japan, Kawasaki, Japan.
| | - Rina So
- Ergonomics Research Group, National Institute of Occupational Safety and Health, Japan, Kawasaki, Japan
- Research Center for Overwork-Related Disorders, National Institute of Occupational Safety and Health, Japan, Kawasaki, Japan
| | - Fumiko Murai
- Research Center for Overwork-Related Disorders, National Institute of Occupational Safety and Health, Japan, Kawasaki, Japan
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Jaafar Z, Lim YZ. A comparison of low and high dose of moderate intensity aerobic exercise on heart rate recovery of the sedentary adults: a pragmatic randomized controlled trial. J Sports Med Phys Fitness 2023; 63:310-318. [PMID: 35620954 DOI: 10.23736/s0022-4707.22.13958-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND Heart rate recovery (HRR) has been used as a prognostication marker of health. A slower drop in HRR is linked to a higher risk of cardiovascular diseases and all-cause mortality. Since aerobic exercise has been shown to have favorable effects on HRR, we aimed to compare the effects of two different aerobic exercise doses on HRR among a sedentary adult population. METHODS A pragmatic randomised controlled trial was conducted on 29 healthy sedentary adults (seven males and 22 females) in a 12-week exercise program. They were randomly assigned to group A (75 min/week, N.=15) or group B (150 min/week, N.=14) of moderate intensity aerobic exercise groups. HRR at 1-minute (HRR1), HRR at 2-minute (HRR2), and peak oxygen uptake (VO<inf>2peak</inf>) were measured pre- and post-intervention. RESULTS The improvements of HRR1 and HRR2 were seen in both groups but was only significant (P<0.05) for group A with HRR1, -4.07 bpm (post 24.47±6.42 - pre 20.40±5.51, P=0.018) and HHR2, -3.93 bpm (post 43.40±13.61 - pre 39.47±10.68, P=0.046). Group B showed increment of HRR1, -1.14 bpm (post 21.14±5.35 - pre 20.00±6.30, P=0.286) and HRR2, -2.5 bpm, (post 39.36±8.01 - pre 36.86±9.57, P=0.221). Improvement of the VO<inf>2peak</inf> was only significant in group B with an increment of 1.52±2.61 (P=0.049). CONCLUSIONS In conclusion, our study suggests that improvements in heart rate recovery (HRR1 and HRR2) among sedentary healthy adults can be achieved by engaging in moderate intensity exercise at a dose lower than the current recommended guidelines. The lower dose seems to be more attainable and may encourage exercise compliance. Future studies should further explore the effects of different exercise volumes on HRR in a larger sample size and also by controlling for BMI or gender.
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Affiliation(s)
- Zulkarnain Jaafar
- Sports Medicine Unit, Faculty of Medicine, Malaya University, Kuala Lumpur, Malaysia - .,Sports and Exercise Medicine Research and Education Group, Faculty of Medicine, Malaya University, Kuala Lumpur, Malaysia -
| | - Yi Z Lim
- Sports Medicine Unit, Faculty of Medicine, Malaya University, Kuala Lumpur, Malaysia
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Tsirigkakis S, Koutedakis Y, Mastorakos G, Stavrinou PS, Mougios V, Bogdanis GC. Physiological, perceptual and affective responses to high-intensity interval training using two work-matched programs with different bout duration in obese males. J Exerc Sci Fit 2022; 20:199-205. [PMID: 35510254 PMCID: PMC9035702 DOI: 10.1016/j.jesf.2022.04.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 04/06/2022] [Accepted: 04/07/2022] [Indexed: 02/07/2023] Open
Abstract
Objectives This study compared physiological, perceptual, and affective responses to high-intensity interval training (HIIT) between two work-matched programs with different bout durations in obese males. Methods Sixteen low-to-moderately active obese men completed an eight-week cycling program of supervised HIIT (3 days/week) using either short bouts [48 × 10 s at 100% of peak power output (PPO) with 15 s of recovery (HIIT10)] or long bouts [8 × 60 s at 100% PPO with 90 s of recovery (HIIT60)]. Workload was progressively adjusted, to maintain high intensity (100% PPO), throughout training. Blood lactate (BLa), heart rate (HR), ratings of perceived exertion (RPE), and feeling scale ratings (pleasure/displeasure) were measured in each HIIT session. Results Average HR decreased in the last 2 weeks of training in both groups by 2.2 ± 1.8% of peak HR (p < 0.001). Training resulted in a reduction in BLa during exercise by 28 ± 19% (p < 0.001) from the 10th min onward only in HIIT10. Similarly, during the last weeks of training, RPE decreased (by 1.0 ± 1.1 units, p < 0.05) and feeling scale ratings were improved only in HIIT10, while RPE remained unchanged and feeling scale ratings deteriorated in HIIT60 (from 3.0 ± 1.1 to 2.1 ± 0.9 units, p < 0.001). No differences in post-exercise enjoyment were found. Conclusion Both HIIT formats induced similar HR adaptations, but improvement of BLa, perceptual and affective responses occurred only when bout duration was shorter. Our findings suggest that, in low-to-moderately active obese men, HIIT may be more effective in improving metabolic, perceptual, and affective responses when shorter, rather than longer, bouts of exercise are used.
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Affiliation(s)
- Spyridon Tsirigkakis
- School of Physical Education & Sports Science, University of Thessaly, Trikala, Greece
| | - Yiannis Koutedakis
- School of Physical Education & Sports Science, University of Thessaly, Trikala, Greece
| | - George Mastorakos
- Unit of Metabolism and Endocrinology of Physical Activity and Sport, Aretaieion Hospital, Faculty of Medicine, National and Kapodistrian University of Athens, Athens, Greece.,Unit of Endocrinology, Diabetes Mellitus and Metabolism, Aretaieion Hospital, Faculty of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | | | - Vassilis Mougios
- Laboratory of Evaluation of Human Biological Performance, School of Physical Education and Sport Science, Aristotle University of Thessaloniki, 57001, Thessaloniki, Greece
| | - Gregory C Bogdanis
- School of Physical Education and Sport Science, National and Kapodistrian University of Athens, 17237, Athens, Greece
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Arrieta H, Rezola-Pardo C, Gil J, Kortajarena M, Zarrazquin I, Echeverria I, Mugica I, Limousin M, Rodriguez-Larrad A, Irazusta J. Effects of an individualized and progressive multicomponent exercise program on blood pressure, cardiorespiratory fitness, and body composition in long-term care residents: Randomized controlled trial. Geriatr Nurs 2022; 45:77-84. [PMID: 35339954 DOI: 10.1016/j.gerinurse.2022.03.005] [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: 01/07/2022] [Revised: 03/10/2022] [Accepted: 03/12/2022] [Indexed: 11/04/2022]
Abstract
This study analyzed the effects of an individualized and progressive multicomponent exercise program on blood pressure, cardiorespiratory fitness, and body composition in long-term care residents. This was a single-blind, multicenter, randomized controlled trial performed in 10 long-term care settings and involved 112 participants. Participants were randomly assigned to a control group or an intervention group. The control group participated in routine activities; the intervention group participated in a six-month individualized and progressive multicomponent exercise program focused on strength, balance, and walking recommendations. The intervention group maintained peak VO2, oxygen saturation, and resting heart rate, while the control group showed a significant decrease in peak VO2 and oxygen saturation and an increase in resting heart rate throughout the six-month period. Individualized and progressive multicomponent exercise programs comprising strength, balance, and walking recommendations appear to be effective in preventing cardiorespiratory fitness decline in older adults living in long-term care settings.
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Affiliation(s)
- Haritz Arrieta
- Department of Nursing II, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Begiristain Doktorea Pasealekua 105, E-20014 Donostia-San Sebastián, Gipuzkoa, Spain..
| | - Chloe Rezola-Pardo
- Department of Physiology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, E-48940 Leioa, Bizkaia, Spain
| | - Javier Gil
- Department of Physiology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, E-48940 Leioa, Bizkaia, Spain
| | - Maider Kortajarena
- Department of Nursing II, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Begiristain Doktorea Pasealekua 105, E-20014 Donostia-San Sebastián, Gipuzkoa, Spain
| | - Idoia Zarrazquin
- Department of Nursing II, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Begiristain Doktorea Pasealekua 105, E-20014 Donostia-San Sebastián, Gipuzkoa, Spain
| | - Iñaki Echeverria
- Department of Physiology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, E-48940 Leioa, Bizkaia, Spain.; Department of Physical Education and Sport, Faculty of Education and Sport, University of the Basque Country (UPV/EHU), Portal de Lasarte 71, E-01007 Vitoria-Gasteiz (Araba), Spain
| | - Itxaso Mugica
- Department of Nursing II, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Begiristain Doktorea Pasealekua 105, E-20014 Donostia-San Sebastián, Gipuzkoa, Spain
| | - Marta Limousin
- Uzturre Asistentzia Gunea, San Joan Kalea 4, E-20400 Tolosa (Gipuzkoa), Spain
| | - Ana Rodriguez-Larrad
- Department of Physiology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, E-48940 Leioa, Bizkaia, Spain
| | - Jon Irazusta
- Department of Physiology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, E-48940 Leioa, Bizkaia, Spain
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Effect of Interval Training on the Factors Influencing Maximal Oxygen Consumption: A Systematic Review and Meta-Analysis. Sports Med 2022; 52:1329-1352. [PMID: 35041180 DOI: 10.1007/s40279-021-01624-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/07/2021] [Indexed: 10/19/2022]
Abstract
BACKGROUND The maximal rate of oxygen consumption (VO2max) is an important measure in exercise science as it is an indicator of cardiorespiratory fitness. Individual studies have identified central and peripheral adaptions to interval training that may underlie improvements in VO2max, but there is no compilation of results. OBJECTIVE We aimed to systematically review the adaptive responses to high-intensity interval training (HIIT) and sprint interval training (SIT) on the central and peripheral factors influencing VO2max in healthy individuals. DATA SOURCES SPORTDiscus and MEDLINE (up to and including 13 June, 2020) were explored to conduct the literature search. STUDY SELECTION Reviewed studies met the following criteria: (1) were in the English language; (2) prospective in nature; (3) included at least three interval sessions or were at least 1 week in duration; (4) contained HIIT or SIT; (5) involved participants between the ages of 18 and 65 years; and (6) included at least one of the following central (blood volume, plasma volume, hemoglobin mass, left ventricular mass, maximal stroke volume, maximal cardiac output) or peripheral factors (capillary density, maximal citrate synthase activity, mitochondrial respiration associated with VO2max). RESULTS Thirty-two studies (369 participants, 49 were female) were included in the quantitative analyses, consisting of both HIIT (n = 18) and SIT (n = 17) interventions. There were only statistically significant changes in hematological measures (plasma volume) following HIIT. There was a significant increase in left ventricular mass following HIIT (7.4%, p < 0.001) and SIT (5.3%, p = 0.007) in inactive individuals, though the change following SIT may be misleading. There was only a significant increase in maximal stroke volume (14.1%, p = 0.015) and maximal cardiac output (12.6%, p = 0.002) following HIIT. In addition to central factors, there was a significant increase in capillary density (13.8%, p < 0.001) following SIT in active individuals. With respect to maximal citrate synthase activity, there were improvements following HIIT (20.8%, p < 0.001) and SIT (15.7%, p < 0.001, I2 = 97%) in active individuals. The results for mitochondrial respiration suggested that there was no statistically significant improvement following HIIT (5.0%, p = 0.585). CONCLUSIONS Improvements in the central and peripheral factors influencing VO2max were dependent on the interval type. Only HIIT led to a statistically significant improvement in cardiac function. Both HIIT and SIT increased maximal citrate synthase activity, while changes in other peripheral measures (capillary density, mitochondrial respiration) only occurred with SIT.
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Slow and Steady, or Hard and Fast? A Systematic Review and Meta-Analysis of Studies Comparing Body Composition Changes between Interval Training and Moderate Intensity Continuous Training. Sports (Basel) 2021; 9:sports9110155. [PMID: 34822354 PMCID: PMC8619923 DOI: 10.3390/sports9110155] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 11/08/2021] [Accepted: 11/12/2021] [Indexed: 12/19/2022] Open
Abstract
Purpose: To conduct a systematic review and multilevel meta-analysis of the current literature as to the effects of interval training (IT) vs moderate intensity continuous training (MICT) on measures of body composition, both on a whole-body and regional level. Methods: We searched English-language papers on PubMed/MEDLINE, Scopus, CINAHL, and sportrxiv for the following inclusion criteria: (a) randomized controlled trials that directly compared IT vs MICT body composition using a validated measure in healthy children and adults; (b) training was carried out a minimum of once per week for at least four weeks; (c) published in a peer-reviewed English language journal or on a pre-print server. Results: The main model for fat mass effects revealed a trivial standardized point estimate with high precision for the interval estimate, with moderate heterogeneity (−0.016 (95%CI −0.07 to 0.04); I2 = 36%). The main model for fat-free mass (FFM) effects revealed a trivial standardized point estimate with high precision for the interval estimate, with negligible heterogeneity (−0.0004 (95%CI −0.05 to 0.05); I2 = 16%). The GRADE summary of findings suggested high certainty for both main model effects. Conclusions: Our findings provide compelling evidence that the pattern of intensity of effort and volume during endurance exercise (i.e., IT vs MICT) has minimal influence on longitudinal changes in fat mass and FFM, which are likely to minimal anyway. Trial registration number: This study was preregistered on the Open Science Framework.
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Post-exercise heart rate recovery and parasympathetic reactivation are comparable between prepubertal boys and well-trained adult male endurance athletes. Eur J Appl Physiol 2021; 122:345-355. [PMID: 34705108 PMCID: PMC8548865 DOI: 10.1007/s00421-021-04823-0] [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: 06/04/2021] [Accepted: 09/25/2021] [Indexed: 11/25/2022]
Abstract
Purpose This study tested the hypothesis that prepubertal boys, but not untrained men, would exhibit a similar post-exercise parasympathetic reactivation as well-trained adult male endurance athletes.
Methods Twelve prepubertal boys (12.3 ± 1.6 years), 14 untrained men (21.8 ± 2.2 years) and 16 well-trained adult male endurance athletes (24.5 ± 4.8 years) completed an incremental maximal run field test on a track. Immediately after exercise completion, heart rate recovery (HRR) was assessed in the supine position for 5 min. Heart rate variability was analyzed in the time domain, and log-transformed values of the root mean square of successive differences in heart beats (Ln RMSSD30) were calculated over consecutive 30 s windows. Results Prepubertal children and well-trained adult endurance athletes showed significantly faster HRR than untrained adults from 30 s post-exercise until the end of recovery (p < 0.05). Ln RMSSD30 was significantly higher in prepubertal children and athletes than untrained adults over the post-exercise time interval 60–150 s (p < 0.05). No significant differences were observed for HRR and Ln RMSSD30 between prepubertal children and athletes. Conclusion Prepubertal children and well-trained adult endurance athletes exhibited comparable and faster HRR and parasympathetic reactivation than untrained adults following maximal exercise. This indirectly suggests that oxidative profile may be preserved by exercise training during growth and maturation to offset the decline in post-exercise HRR, parasympathetic reactivation and aspects of metabolic health.
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11
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Astorino TA, Emma D. Differences in Physiological and Perceptual Responses to High Intensity Interval Exercise Between Arm and Leg Cycling. Front Physiol 2021; 12:700294. [PMID: 34483956 PMCID: PMC8416450 DOI: 10.3389/fphys.2021.700294] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Accepted: 08/02/2021] [Indexed: 12/23/2022] Open
Abstract
This study compared changes in oxygen uptake (VO2), heart rate (HR), blood lactate concentration (BLa), affective valence, and rating of perceived exertion (RPE) between sessions of high intensity interval exercise (HIIE) performed on the arm (ACE) and leg cycle ergometer (LCE). Twenty three active and non-obese men and women (age and BMI=24.7±5.8year and 24.8±3.4kg/m2) initially underwent graded exercise testing to determine VO2max and peak power output (PPO) on both ergometers. Subsequently on two separate days, they performed 10 1min intervals of ACE or LCE at 75 %PPO separated by 1min of active recovery at 10 %PPO. Gas exchange data, HR, and perceptual responses were obtained continuously and blood samples were acquired pre- and post-exercise to assess the change in BLa. VO2max and PPO on the LCE were significantly higher (p<0.001) than ACE (37.2±6.3 vs. 26.3±6.6ml/kg/min and 259.0±48.0 vs. 120.0±48.1W). Mean VO2 (1.7±0.3 vs. 1.1±0.3L/min, d=2.3) and HR (149±14 vs. 131±17 b/min, d=2.1) were higher (p<0.001) in response to LCE vs. ACE as was BLa (7.6±2.6 vs. 5.3±2.5mM, d=2.3), yet there was no difference (p=0.12) in peak VO2 or HR. Leg cycling elicited higher relative HR compared to ACE (81±5 vs. 75±7 %HRmax, p=0.01), although, there was no difference in relative VO2 (63±6 vs. 60±8 %VO2max, p=0.09) between modes. Affective valence was lower during LCE vs. ACE (p=0.003), although no differences in enjoyment (p=0.68) or RPE (p=0.59) were demonstrated. Overall, HIIE performed on the cycle ergometer elicits higher relative heart rate and blood lactate concentration and a more aversive affective valence, making these modes not interchangeable in terms of the acute physiological and perceptual response to interval based exercise.
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Affiliation(s)
- Todd A Astorino
- Department of Kinesiology, California State University-San Marcos, San Marcos, CA, United States
| | - Danielle Emma
- Department of Kinesiology, California State University-San Marcos, San Marcos, CA, United States
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Resende AS, Leite GSF, Lancha Junior AH. Changes in the Gut Bacteria Composition of Healthy Men with the Same Nutritional Profile Undergoing 10-Week Aerobic Exercise Training: A Randomized Controlled Trial. Nutrients 2021; 13:nu13082839. [PMID: 34444999 PMCID: PMC8398245 DOI: 10.3390/nu13082839] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 07/24/2021] [Accepted: 07/27/2021] [Indexed: 12/24/2022] Open
Abstract
Nutrient consumption and body mass index (BMI) are closely related to the gut microbiota, and exercise effects on gut bacteria composition may be related to those variables. Thus, we aimed to investigate the effect of 10-week moderate aerobic exercise on the cardiorespiratory fitness and gut bacteria composition of non-obese men with the same nutritional profile. Twenty-four previously sedentary men (age 25.18 [SD 4.66] years, BMI 24.5 [SD 3.72] kg/m2) were randomly assigned into Control (CG; n = 12) or Exercise Groups (EG; n = 12). Body composition, cardiorespiratory parameters, blood markers, dietary habits and gut bacteria composition were evaluated. EG performed 150 min per week of supervised moderate (60–65% of VO2peak) aerobic exercise, while CG maintained their daily routine. The V4 16S rRNA gene was sequenced and treated using QIIME software. Only EG demonstrated marked improvements in cardiorespiratory fitness (VO2peak, p < 0.05; Effect Size = 0.971) without changes in other gut bacteria-affecting variables. Exercise did not promote clustering based on diversity indices (p > 0.05), although significant variations in an unclassified genus from Clostridiales order and in Streptococcus genus were observed (p < 0.05). Moreover, α-diversity was correlated with VO2peak (Pearson’s R: 0.47; R2 0.23: 95%CI: 0.09 to 0.74, p = 0.02) and BMI (Pearson’s R: −0.50; R2 0.25: 95%CI: −0.75 to −0.12, p = 0.01). Roseburia, Sutterella and Odoribacter genera were associated with VO2peak, while Desulfovibrio and Faecalibacterium genera were associated with body composition (p < 0.05). Our study indicates that aerobic exercise at moderate intensity improved VO2peak and affected gut bacteria composition of non-obese men who maintained a balanced consumption of nutrients.
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Affiliation(s)
- Ayane S. Resende
- Health Sciences Graduate Program, Federal University of Sergipe, São Cristovão 49100-000, SE, Brazil
- Correspondence: ; Tel.: +55-11-3061-7474
| | - Geovana S. F. Leite
- Laboratory of Nutrition and Metabolism Applied to Motor Activity, School of Physical Education and Sports, University of Sao Paulo, São Paulo 05508-030, SP, Brazil;
| | - Antonio H. Lancha Junior
- Laboratory of Clinical Investigation: Experimental Surgery (LIM/26), Clinics’ Hospital of Medical School, University of Sao Paulo, São Paulo 01246-903, SP, Brazil;
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Callahan MJ, Parr EB, Hawley JA, Camera DM. Can High-Intensity Interval Training Promote Skeletal Muscle Anabolism? Sports Med 2021; 51:405-421. [PMID: 33512698 DOI: 10.1007/s40279-020-01397-3] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Exercise training in combination with optimal nutritional support is an effective strategy to maintain or increase skeletal muscle mass. A single bout of resistance exercise undertaken with adequate protein availability increases rates of muscle protein synthesis and, when repeated over weeks and months, leads to increased muscle fiber size. While resistance-based training is considered the 'gold standard' for promoting muscle hypertrophy, other modes of exercise may be able to promote gains in muscle mass. High-intensity interval training (HIIT) comprises short bouts of exercise at or above the power output/speed that elicits individual maximal aerobic capacity, placing high tensile stress on skeletal muscle, and somewhat resembling the demands of resistance exercise. While HIIT induces rapid increases in skeletal muscle oxidative capacity, the anabolic potential of HIIT for promoting concurrent gains in muscle mass and cardiorespiratory fitness has received less scientific inquiry. In this review, we discuss studies that have determined muscle growth responses after HIIT, with a focus on molecular responses, that provide a rationale for HIIT to be implemented among populations who are susceptible to muscle loss (e.g. middle-aged or older adults) and/or in clinical settings (e.g. pre- or post-surgery).
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Affiliation(s)
- Marcus J Callahan
- Exercise and Nutrition Research Program, Mary MacKillop Institute for Health Research, Australian Catholic University, 215 Spring street, Melbourne, VIC, 3000, Australia
| | - Evelyn B Parr
- Exercise and Nutrition Research Program, Mary MacKillop Institute for Health Research, Australian Catholic University, 215 Spring street, Melbourne, VIC, 3000, Australia
| | - John A Hawley
- Exercise and Nutrition Research Program, Mary MacKillop Institute for Health Research, Australian Catholic University, 215 Spring street, Melbourne, VIC, 3000, Australia.
| | - Donny M Camera
- Department of Health and Medical Sciences, Swinburne University of Technology, Melbourne, VIC, Australia
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14
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Mattioni Maturana F, Martus P, Zipfel S, NIEß AM. Effectiveness of HIIE versus MICT in Improving Cardiometabolic Risk Factors in Health and Disease: A Meta-analysis. Med Sci Sports Exerc 2021; 53:559-573. [PMID: 32890201 DOI: 10.1249/mss.0000000000002506] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
PURPOSE We aimed to investigate differences between high-intensity interval exercise (HIIE, including high-intensity interval training and sprint interval training) and moderate-intensity continuous training (MICT) on physical fitness, body composition, blood pressure, blood lipids, insulin and glucose metabolism, inflammation, and endothelial function. METHODS Differences between HIIE and MICT were summarized using a random-effects meta-analysis on the effect size (Cohen's d). A meta-regression was conducted using the following subgroups: population, age, training duration, men ratio, exercise type, baseline values (clinical relevant ranges), and type of HIIE. Studies were included if at least one of the following outcomes were reported: maximal oxygen uptake (V˙O2max), flow-mediated dilation (FMD), body mass index (BMI), body mass, percent body fat, systolic and diastolic blood pressure, high-density lipoprotein (HDL), low-density lipoprotein (LDL), triglycerides, total cholesterol, C-reactive protein (CRP), fasting glucose and insulin, glycated hemoglobin (HbA1c), and insulin resistance (HOMA-IR). A total of 55 studies were included. RESULTS Overall, HIIE was superior to MICT in improving V˙O2max (d = 0.40, P < 0.001) and FMD (d = 0.54, P < 0.05). Oppositely, MICT was superior to HIIE in improving HbA1c (d = -0.27, P < 0.05). No differences were observed in BMI (d = -0.02), body mass (d = -0.05), percent body fat (d = 0.04), systolic blood pressure (d = -0.04), diastolic blood pressure (d = 0.03), HDL (d = -0.05), LDL (d = 0.08), triglycerides (d = 0.03), total cholesterol (d = 0.14), CRP (d = -0.11), fasting insulin (d = 0.02), fasting glucose (d = 0.02), and HOMA-IR (d = -0.04). Moderator analyses indicated that the difference between HIIE and MICT was affected by different subgroups. CONCLUSION Overall, HIIE showed to be more effective in improving cardiovascular health and cardiorespiratory fitness, whereas MICT was superior in improving long-term glucose metabolism. In the process of personalized training counseling, health-enhancing effects of exercise training may be improved by considering the individual risk profiles.
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Affiliation(s)
| | - Peter Martus
- Clinical Epidemiology and Applied Biometrics Department, University Hospital of Tübingen, Tübingen, GERMANY
| | - Stephan Zipfel
- Psychosomatic Medicine and Psychotherapy Department, University Hospital of Tübingen, Tübingen, GERMANY
| | - Andreas M NIEß
- Sports Medicine Department, University Hospital of Tübingen, Tübingen, GERMANY
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15
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De Revere JL, Clausen RD, Astorino TA. Changes in VO2max and cardiac output in response to short-term high-intensity interval training in Caucasian and Hispanic young women: A pilot study. PLoS One 2021; 16:e0244850. [PMID: 33481836 PMCID: PMC7822506 DOI: 10.1371/journal.pone.0244850] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 12/16/2020] [Indexed: 12/21/2022] Open
Abstract
Data obtained in primarily Caucasian (C) and African American adults show that ethnicity does not mediate responsiveness to exercise training. It is unknown if Hispanics (H), who face elevated health risks and are less active than C, exhibit a similar response to exercise training. This study compared cardiorespiratory and hemodynamic responses to high intensity interval training (HIIT) between C and H women. Twelve C and ten H women ages 19–35 yr who were non-obese and inactive completed nine sessions of HIIT over a 3 wk period. Maximal oxygen uptake (VO2max) was assessed twice at baseline during which thoracic impedance was used to evaluate heart rate (HR), stroke volume (SV) and cardiac output (CO). Habitual physical activity was assessed using accelerometry. Results showed a significant main effect of training for VO2max in C and H (F = 13.97, p = 0.001) and no group by training interaction (p = 0.65). There was a main effect of training for CO and SV in C and H (F = 7.57, p = 0.01; F = 7.16, p = 0.02), yet post hoc analyses revealed significant increases were only exhibited in C. There was a tendency for a group by training interaction for a-VO2diff (F = 1.32, p = 0.054), and a large effect size was seen in H (d = 1.02). Overall, data show no effect of ethnicity on changes in VO2max with low-volume HIIT, yet C and H may achieve this outcome differently. Longer studies in similar populations are needed to verify this result.
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Affiliation(s)
- Jamie L. De Revere
- Department of Kinesiology, California State University—San Marcos, San Marcos, California, United States of America
| | - Rasmus D. Clausen
- Department of Kinesiology, California State University—San Marcos, San Marcos, California, United States of America
| | - Todd A. Astorino
- Department of Kinesiology, California State University—San Marcos, San Marcos, California, United States of America
- * E-mail:
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16
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Estimating cardiorespiratory fitness from heart rates both during and after stepping exercise: a validated simple and safe procedure for step tests at worksites. Eur J Appl Physiol 2020; 120:2445-2454. [PMID: 32812102 DOI: 10.1007/s00421-020-04457-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Accepted: 07/31/2020] [Indexed: 10/23/2022]
Abstract
PURPOSE Step test protocols are typically based on the heart rate (HR) measured either during exercise or during recovery. This study developed a new step test protocol to estimate maximal oxygen consumption ([Formula: see text]) based on HRs measured during and after exercise, assessed the criterion validity of the model, and evaluated the protocol's test-retest reliability. METHODS The protocol estimates [Formula: see text] from HR measurements made once a minute during 3 min of step exercise and 2 min of recovery. The model was derived using a group of 118 working adults and cross-validated using a second group of 74 working adults. Furthermore, [Formula: see text] was measured using a conventional treadmill test. While multiple regression analyses were used to develop prediction equations for [Formula: see text], intraclass correlation coefficients (ICCs) were used to examine test-retest reliability. RESULTS HRs during and after exercise significantly correlated with the measured [Formula: see text]. The highest correlation (r = - 0.61) was for an HR index that combined values of HRs during and after exercise. A model including age, sex, body mass index, and the HR index accounted for 60% of the variance in measured [Formula: see text] (standard error of the estimate, 4.05 mL kg-1 min-1 or 10.5%). Cross-validation analyses demonstrated good stability of the [Formula: see text] prediction models. The ICC for the HR index was 0.65 (0.53-0.74), indicating fair to good reliability. CONCLUSION The HR index, based on a combination of HR measurements during and after stepping exercise, offers a validated [Formula: see text] estimation procedure suitable for use in the workplace.
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The Effect of Low-Volume High-Intensity Interval Training on Body Composition and Cardiorespiratory Fitness: A Systematic Review and Meta-Analysis. Sports Med 2020; 49:1687-1721. [PMID: 31401727 DOI: 10.1007/s40279-019-01167-w] [Citation(s) in RCA: 125] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Evidence for the efficacy of low-volume high-intensity interval training (HIIT) for the modulation of body composition is unclear. OBJECTIVES We examined the effect of low-volume HIIT versus a non-exercising control and moderate-intensity continuous training (MICT) on body composition and cardiorespiratory fitness in normal weight, overweight and obese adults. We evaluated the impact of low-volume HIIT (HIIT interventions where the total amount of exercise performed during training was ≤ 500 metabolic equivalent minutes per week [MET-min/week]) compared to a non-exercising control and MICT. METHODS A database search was conducted in PubMed (MEDLINE), EMBASE, CINAHL, Web of Science, SPORTDiscus and Scopus from the earliest record to June 2019 for studies (randomised controlled trials and non-randomised controlled trials) with exercise training interventions with a minimum 4-week duration. Meta-analyses were conducted for between-group (low-volume HIIT vs. non-exercising control and low-volume HIIT vs. MICT) comparisons for change in total body fat mass (kg), body fat percentage (%), lean body mass (kg) and cardiorespiratory fitness. RESULTS From 11,485 relevant records, 47 studies were included. No difference was found between low-volume HIIT and a non-exercising control on total body fat mass (kg) (effect size [ES]: - 0.129, 95% confidence interval [CI] - 0.468 to 0.210; p = 0.455), body fat (%) (ES: - 0.063, 95% CI - 0.383 to 0.257; p = 0.700) and lean body mass (kg) (ES: 0.050, 95% CI - 0.250 to 0.351; p = 0.744), or between low-volume HIIT and MICT on total body fat mass (kg) (ES: - 0.021, 95% CI - 0.272 to 0.231; p = 0.872), body fat (%) (ES: 0.005, 95% CI - 0.294 to 0.304; p = 0.974) and lean body mass (kg) (ES: 0.030, 95% CI - 0.167 to 0.266; p = 0.768). However, low-volume HIIT significantly improved cardiorespiratory fitness compared with a non-exercising control (p < 0.001) and MICT (p = 0.017). CONCLUSION These data suggest that low-volume HIIT is inefficient for the modulation of total body fat mass or total body fat percentage in comparison with a non-exercise control and MICT. A novel finding of our meta-analysis was that there appears to be no significant effect of low-volume HIIT on lean body mass when compared with a non-exercising control, and while most studies tended to favour improvement in lean body mass with low-volume HIIT versus MICT, this was not significant. However, despite its lower training volume, low-volume HIIT induces greater improvements in cardiorespiratory fitness than a non-exercising control and MICT in normal weight, overweight and obese adults. Low-volume HIIT, therefore, appears to be a time-efficient treatment for increasing fitness, but not for the improvement of body composition.
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18
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Matsuo T, So R, Takahashi M. Workers' physical activity data contribute to estimating maximal oxygen consumption: a questionnaire study to concurrently assess workers' sedentary behavior and cardiorespiratory fitness. BMC Public Health 2020; 20:22. [PMID: 31914965 PMCID: PMC6950791 DOI: 10.1186/s12889-019-8067-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Accepted: 12/11/2019] [Indexed: 11/29/2022] Open
Abstract
Background Sedentary behavior (SB) and cardiorespiratory fitness (CRF) are important issues in occupational health. Developing a questionnaire to concurrently assess workers’ SB and CRF could fundamentally improve epidemiological research. The Worker’s Living Activity-time Questionnaire (WLAQ) was developed previously to assess workers’ sitting time. WLAQ can be modified to evaluate workers’ CRF if additional physical activity (PA) data such as PA frequency, duration, and intensity are collected. Methods A total of 198 working adults (93 women and 105 men; age, 30–60 years) completed anthropometric measurements, a treadmill exercise test for measuring maximal oxygen consumption (VO2max), and modified WLAQ (m-WLAQ, which included questions about PA data additional to the original questions). Multiple regression analyses were performed to develop prediction equations for VO2max. The generated models were cross-validated using the predicted residual error sum of squares method. Among the participants, the data of 97 participants who completed m-WLAQ twice after a 1-week interval were used to calculate intraclass correlation coefficient (ICC) for the test–retest reliability analyses. Results Age (r = − 0.29), sex (r = 0.48), body mass index (BMI, r = − 0.20), total sitting time (r = − 0.15), and PA score (total points for PA data, r = 0.47) were significantly correlated with VO2max. The models that included age, sex, and BMI accounted for 43% of the variance in measured VO2max [standard error of the estimate (SEE) = 5.04 ml·kg− 1·min− 1]. These percentages increased to 59% when the PA score was included in the models (SEE = 4.29 ml·kg− 1·min− 1). Cross-validation analyses demonstrated good stability of the VO2max prediction models, while systematic underestimation and overestimation of VO2max were observed in individuals with high and low fitness, respectively. The ICC of the PA score was 0.87 (0.82–0.91), indicating excellent reliability. Conclusions The PA score obtained using m-WLAQ, rather than sitting time, correlated well with measured VO2max. The equation model that included the PA score as well as age, sex, and BMI had a favorable validity for estimating VO2max. Thus, m-WLAQ can be a useful questionnaire to concurrently assess workers’ SB and CRF, which makes it a reasonable resource for future epidemiological surveys on occupational health.
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Affiliation(s)
- Tomoaki Matsuo
- Occupational Epidemiology Research Group, National Institute of Occupational Safety and Health, Japan, 6-21-1, Nagao, Tama-ku, Kawasaki, 214-8585, Japan. .,Research Center for Overwork-Related Disorders, National Institute of Occupational Safety and Health, Japan, 6-21-1, Nagao, Tama-ku, Kawasaki, 214-8585, Japan.
| | - Rina So
- Occupational Epidemiology Research Group, National Institute of Occupational Safety and Health, Japan, 6-21-1, Nagao, Tama-ku, Kawasaki, 214-8585, Japan.,Research Center for Overwork-Related Disorders, National Institute of Occupational Safety and Health, Japan, 6-21-1, Nagao, Tama-ku, Kawasaki, 214-8585, Japan
| | - Masaya Takahashi
- Research Center for Overwork-Related Disorders, National Institute of Occupational Safety and Health, Japan, 6-21-1, Nagao, Tama-ku, Kawasaki, 214-8585, Japan
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Effect of different doses of supervised aerobic exercise on heart rate recovery in inactive adults who are overweight or obese: results from E-MECHANIC. Eur J Appl Physiol 2019; 119:2095-2103. [PMID: 31367909 DOI: 10.1007/s00421-019-04198-3] [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: 04/15/2019] [Accepted: 07/23/2019] [Indexed: 10/26/2022]
Abstract
PURPOSE Heart rate recovery (HRR) after exercise is an independent risk factor for cardiovascular disease and mortality. Regular aerobic exercise can improve HRR, yet little is known regarding the dose necessary to promote increases. The aim was to assess the impact of different doses of vigorous-intensity aerobic exercise on HRR in individuals with overweight/obesity. METHODS Data from 137 sedentary adults with overweight/obesity from E-MECHANIC were analyzed. Participants were randomized to either a moderate-dose exercise group (8 kcal/kg body weight/week; KKW), a high-dose exercise group (20 KKW), or a non-exercise control group. HRR was defined as the difference between peak heart rate (HR) during a graded exercise test and the HR after exactly 1 min of active recovery at 1.5 mph and level grade. RESULTS Change in HRR did not differ significantly by exercise group; therefore, the data from both exercise groups were combined. The combined exercise group showed an improvement in HRR of 2.7 bpm (95% CI 0.1, 5.4; p = 0.04) compared to the control group. Those participants who lost more weight during the intervention (non-compensators) increased HRR by 6.2 bpm (95% CI 2.8, 9.5; p < 0.01) compared to those who lost less weight (compensators). Multiple linear regression models indicated that improvements in HRR are independently associated with increases in VO2peak (β = 0.4; 95% CI 0.1, 0.7; p = 0.04) but also influenced by concomitant weight loss (β = 0.6; 95% CI 0.2, 1.1; p = 0.01). CONCLUSION Exercise-induced improvements in 1-min HRR are likely due to increases in cardiorespiratory fitness as well as concomitant weight loss.
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Birkett ST, Nichols S, Sawrey R, Gleadall-Siddall D, McGregor G, Ingle L. The effects of low-volume high-intensity interval training and circuit training on maximal oxygen uptake. SPORT SCIENCES FOR HEALTH 2019. [DOI: 10.1007/s11332-019-00552-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ito S. High-intensity interval training for health benefits and care of cardiac diseases - The key to an efficient exercise protocol. World J Cardiol 2019; 11:171-188. [PMID: 31565193 PMCID: PMC6763680 DOI: 10.4330/wjc.v11.i7.171] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Revised: 06/28/2019] [Accepted: 07/16/2019] [Indexed: 02/06/2023] Open
Abstract
Aerobic capacity, which is expressed as peak oxygen consumption (VO2peak), is well-known to be an independent predictor of all-cause mortality and cardiovascular prognosis. This is true even for people with various coronary risk factors and cardiovascular diseases. Although exercise training is the best method to improve VO2peak, the guidelines of most academic societies recommend 150 or 75 min of moderate- or vigorous- intensity physical activities, respectively, every week to gain health benefits. For general health and primary and secondary cardiovascular prevention, high-intensity interval training (HIIT) has been recognized as an efficient exercise protocol with short exercise sessions. Given the availability of the numerous HIIT protocols, which can be classified into aerobic HIIT and anaerobic HIIT [usually called sprint interval training (SIT)], professionals in health-related fields, including primary physicians and cardiologists, may find it confusing when trying to select an appropriate protocol for their patients. This review describes the classifications of aerobic HIIT and SIT, and their differences in terms of effects, target subjects, adaptability, working mechanisms, and safety. Understanding the HIIT protocols and adopting the correct type for each subject would lead to better improvements in VO2peak with higher adherence and less risk.
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Affiliation(s)
- Shigenori Ito
- Division of Cardiology, Sankuro Hospital, Aichi-ken, Toyota 4710035, Japan
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Mahjoub H, Le Blanc O, Paquette M, Imhoff S, Labrecque L, Drapeau A, Poirier P, Bédard É, Pibarot P, Brassard P. Cardiac remodeling after six weeks of high-intensity interval training to exhaustion in endurance-trained men. Am J Physiol Heart Circ Physiol 2019; 317:H685-H694. [PMID: 31347913 DOI: 10.1152/ajpheart.00196.2019] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
High-intensity interval training (HIIT) improves physical performance of endurance athletes, although studies examining its cardiovascular effects are sparse. We evaluated the impact of HIIT on blood pressure, heart rate, and cardiac cavities' size and function in endurance-trained adults. Seventeen endurance-trained men underwent 24-h ambulatory blood pressure monitoring and Doppler echocardiography at baseline and after 6 wk of HIIT. Participants were divided into 2 groups [85% maximal aerobic power (HIIT85), n = 8 and 115% maximal aerobic power (HIIT115), n = 9] to compare the impact of different HIIT intensities. Ambulatory blood pressure monitoring and cardiac chambers' size and function were similar between groups at baseline. HIIT reduced heart rate (55 ± 8 vs. 51 ± 7 beats/min; P = 0.003), systolic blood pressure (121 ± 11 vs. 118 ± 9 mmHg; P = 0.01), mean arterial pressure (90 ± 8 vs. 89 ± 6 mmHg; P = 0.03), and pulse pressure (52 ± 6 vs. 49 ± 5 mmHg; P = 0.01) irrespective of training intensity. Left atrium volumes increased after HIIT (maximal: 50 ± 14 vs. 54 ± 14 mL; P = 0.02; minimal: 15 ± 5 vs. 20 ± 8 mL; P = 0.01) in both groups. Right ventricle global longitudinal strain lowered after training in the HIIT85 group only (20 ± 4 vs. 17 ± 3%, P = 0.04). In endurance-trained men, 6 wk of HIIT reduced systolic blood pressure and mean arterial pressure and increased left atrium volumes irrespective of training intensity, whereas submaximal HIIT deteriorated right ventricle systolic function.NEW & NOTEWORTHY The novel findings of this study are that 6 wk of high-intensity interval training increases left atrial volumes irrespective of training intensity (85 or 115% maximal aerobic power), whereas the submaximal training decreases right ventricular systolic function in endurance-trained men. These results may help identify the exercise threshold for potential toxicity of intense exercise training for at-risk individuals and ideal exercise training regimens conferring optimal cardiovascular protection and adapted endurance training for athletes.
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Affiliation(s)
- Haïfa Mahjoub
- Department of Medicine, Université Laval, Québec, Canada
| | - Olivier Le Blanc
- Department of Kinesiology, Faculty of Medicine, Université Laval, Québec, Canada.,Research Center of the Institut Universitaire de Cardiologie et de Pneumologie de Québec, Québec, Canada
| | - Myriam Paquette
- Department of Kinesiology, Faculty of Medicine, Université Laval, Québec, Canada.,Research Center of the Institut Universitaire de Cardiologie et de Pneumologie de Québec, Québec, Canada
| | - Sarah Imhoff
- Department of Kinesiology, Faculty of Medicine, Université Laval, Québec, Canada.,Research Center of the Institut Universitaire de Cardiologie et de Pneumologie de Québec, Québec, Canada
| | - Lawrence Labrecque
- Department of Kinesiology, Faculty of Medicine, Université Laval, Québec, Canada.,Research Center of the Institut Universitaire de Cardiologie et de Pneumologie de Québec, Québec, Canada
| | - Audrey Drapeau
- Department of Kinesiology, Faculty of Medicine, Université Laval, Québec, Canada.,Research Center of the Institut Universitaire de Cardiologie et de Pneumologie de Québec, Québec, Canada
| | - Paul Poirier
- Research Center of the Institut Universitaire de Cardiologie et de Pneumologie de Québec, Québec, Canada.,Faculty of Pharmacy, Université Laval, Québec, Canada
| | - Élisabeth Bédard
- Research Center of the Institut Universitaire de Cardiologie et de Pneumologie de Québec, Québec, Canada
| | - Philippe Pibarot
- Department of Medicine, Université Laval, Québec, Canada.,Research Center of the Institut Universitaire de Cardiologie et de Pneumologie de Québec, Québec, Canada
| | - Patrice Brassard
- Department of Kinesiology, Faculty of Medicine, Université Laval, Québec, Canada.,Research Center of the Institut Universitaire de Cardiologie et de Pneumologie de Québec, Québec, Canada
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Effects of interval training on risk markers for arrhythmic death: a randomized controlled trial. Clin Rehabil 2019; 33:1320-1330. [DOI: 10.1177/0269215519840388] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Objective: To compare the effects of high-intensity interval training versus moderate-intensity continuous training on risk markers of arrhythmic death in patients who recently suffered from an acute coronary syndrome. Design: Double-blind (patient and evaluator) randomized controlled trial. Setting: Cardiovascular Prevention and Rehabilitation Centre (EPIC Centre) of the Montreal Heart Institute, Montreal, Canada. Subjects: A total of 43 patients were randomized following an acute coronary syndrome. Interventions: Patients were assigned to either high-intensity interval training (n = 18) or isocaloric moderate-intensity continuous training (n = 19), three times a week for a total of 36 sessions. Main measures: Heart rate recovery for 5 minutes, heart rate variability for 24 hours, occurrence of ventricular arrhythmias, and QT dispersion were measured before and after the 36 sessions of training. Results: Among the 43 patients randomized, 6 participants in the high-intensity interval training group stopped training for reasons unrelated to exercise training and were excluded from the analyses. Heart rate recovery improved solely in the high-intensity interval training group, particularly at the end of recovery period ( p < 0.05). There were no differences in heart rate variability, occurrence of ventricular arrhythmias, or QT dispersion parameters between the groups at study end. Conclusion: Despite the lack of power to detect any large difference between the two interventions with respect to risk markers of arrhythmic death, high-intensity interval training appears safe and may be more effective at improving heart rate recovery relative to moderate-intensity continuous training in our patients following acute coronary syndrome.
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Abstract
The interest about circulating cell-free DNA (cfDNA) concentration increased from several years because of its correlation with various conditions like osteoarthritis, cancers, stroke, and sepsis; recently it has become an important marker for overtraining syndrome or performance diagnostics.Several studies have demonstrated that cfDNA increases in vigorous and exhausting exercise but also endurance exercise. Acute effect of exercise on cfDNA concentration seems to be correlated to stress factor, while chronic effect is associated with necrosis and apoptosis.The intensity and duration seem to have effects on the variation of cfDNA concentration that is strongly correlated with other metabolic markers like acid lactate and creatine kinase, recognized as markers of muscle damage. Variation of cfDNA value could be used to predict overtraining syndrome.
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Affiliation(s)
- Leydi Natalia Vittori
- Department for Life Quality Studies, Alma Mater Studiorum-University of Bologna, Bologna, Italy.
| | - Andrea Tarozzi
- Department for Life Quality Studies, Alma Mater Studiorum-University of Bologna, Bologna, Italy
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Orlando P, Silvestri S, Galeazzi R, Antonicelli R, Marcheggiani F, Cirilli I, Bacchetti T, Tiano L. Effect of ubiquinol supplementation on biochemical and oxidative stress indexes after intense exercise in young athletes. Redox Rep 2018; 23:136-145. [PMID: 29734881 PMCID: PMC6748686 DOI: 10.1080/13510002.2018.1472924] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Objectives: Physical exercise significantly impacts the biochemistry
of the organism. Ubiquinone is a key component of the mitochondrial respiratory
chain and ubiquinol, its reduced and active form, is an emerging molecule in
sport nutrition. The aim of this study was to evaluate the effect of ubiquinol
supplementation on biochemical and oxidative stress indexes after an intense
bout of exercise. Methods: 21 male young athletes (26 + 5 years of
age) were randomized in two groups according to a double blind cross-over study,
either supplemented with ubiquinol (200 mg/day) or placebo for 1 month.
Blood was withdrawn before and after a single bout of intense exercise (40 min
run at 85% maxHR). Physical performance, hematochemical parameters,
ubiquinone/ubiquinol plasma content, intracellular reactive oxygen species (ROS)
level, mitochondrial membrane depolarization, paraoxonase activity and oxidative
DNA damage were analyzed. Results: A single bout of intense exercise produced a significant
increase in most hematochemical indexes, in particular CK and Mb while, on the
contrary, normalized coenzyme Q10 plasma content decreased
significantly in all subjects. Ubiquinol supplementation prevented
exercise-induced CoQ deprivation and decrease in paraoxonase activity. Moreover
at a cellular level, in peripheral blood mononuclear cells, ubiquinol
supplementation was associated with a significant decrease in cytosolic ROS
while mitochondrial membrane potential and oxidative DNA damage remained
unchanged. Discussion: Data highlights a very rapid dynamic of CoQ depletion
following intense exercise underlying an increased demand by the organism.
Ubiquinol supplementation minimized exercise-induced depletion and enhanced
plasma and cellular antioxidant levels but it was not able to improve physical
performance indexes or markers of muscular damage.
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Affiliation(s)
- Patrick Orlando
- a Department of Life and Environmental Sciences , Polytechnic University of Marche , Ancona , Italy
| | - Sonia Silvestri
- a Department of Life and Environmental Sciences , Polytechnic University of Marche , Ancona , Italy
| | - Roberta Galeazzi
- b Clinical and Molecular Diagnostic Laboratory , INRCA-IRCCS National Institute , Ancona , Italy
| | - Roberto Antonicelli
- c Department of Cardiology , INRCA-IRCCS National Institute , Ancona , Italy
| | - Fabio Marcheggiani
- d Department of Clinical and Dental Sciences , Polytechnic University of Marche , Ancona , Italy
| | - Ilenia Cirilli
- d Department of Clinical and Dental Sciences , Polytechnic University of Marche , Ancona , Italy
| | - Tiziana Bacchetti
- a Department of Life and Environmental Sciences , Polytechnic University of Marche , Ancona , Italy
| | - Luca Tiano
- a Department of Life and Environmental Sciences , Polytechnic University of Marche , Ancona , Italy
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Abreu RMD, Rehder-Santos P, Simões RP, Catai AM. Can high-intensity interval training change cardiac autonomic control? A systematic review. Braz J Phys Ther 2018; 23:279-289. [PMID: 30293954 DOI: 10.1016/j.bjpt.2018.09.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 09/13/2018] [Accepted: 09/21/2018] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND High intensity interval training (HIIT) has been used as a cardiovascular exercise strategy to promote greater adherence in cardiovascular rehabilitation. However, little is known about the effect of this training modality on cardiac autonomic control. OBJECTIVE To perform a systematic review to evaluate the effects of HIIT on cardiac autonomic responses in humans. METHODS PEDro, SCOPUS and PubMed were searched from the inception to March 29th, 2018. Moreover, the methodological quality and statistical reporting from all eligible clinical trials were assessed by the PEDro scale. The articles were eligible if: The primary objective was related to the effects of HIIT on the cardiac autonomic nervous system. Outcomes evaluated were indirect measures of cardiac autonomic control, represented by HRV indexes. RESULTS The search strategies resulted in 339 citations and 2 additional citations were identified through other sources. After deleting the duplicate articles and revising the full text, 6 articles were included. Overall, the results showed an improvement in parasympathetic and/or sympathetic modulation after HIIT, when evaluated by linear and non-linear indexes of HRV. CONCLUSIONS HIIT is a promising tool to improve the cardiac autonomic control, with more recommendation in healthy individuals and patients with metabolic syndrome.
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Affiliation(s)
- Raphael Martins de Abreu
- Cardiovascular Physical Therapy Laboratory, Department of Physical Therapy, Universidade Federal de Sao Carlos (UFSCar), São Carlos, SP, Brazil
| | - Patrícia Rehder-Santos
- Cardiovascular Physical Therapy Laboratory, Department of Physical Therapy, Universidade Federal de Sao Carlos (UFSCar), São Carlos, SP, Brazil
| | - Rodrigo Polaquini Simões
- Cardiovascular Physical Therapy Laboratory, Department of Physical Therapy, Universidade Federal de Sao Carlos (UFSCar), São Carlos, SP, Brazil
| | - Aparecida Maria Catai
- Cardiovascular Physical Therapy Laboratory, Department of Physical Therapy, Universidade Federal de Sao Carlos (UFSCar), São Carlos, SP, Brazil.
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Differences in Physiological Influences on Heart Rate Recovery between Trained and Untrained Adults. CENTRAL EUROPEAN JOURNAL OF SPORT SCIENCES AND MEDICINE 2018. [DOI: 10.18276/cej.2018.2-02] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Osuka Y, Matsubara M, Hamasaki A, Hiramatsu Y, Ohshima H, Tanaka K. Development of low-volume, high-intensity, aerobic-type interval training for elderly Japanese men: a feasibility study. Eur Rev Aging Phys Act 2017; 14:14. [PMID: 28855969 PMCID: PMC5571578 DOI: 10.1186/s11556-017-0184-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Accepted: 08/09/2017] [Indexed: 12/11/2022] Open
Abstract
Background The purposes of this study were to identify 1) the feasibility of a novel exercise protocol (elderly Japanese male version of high-intensity interval aerobic training: EJ-HIAT) and 2) its preliminary data (%V̇O2peak, rating of perceived exertion) in comparison with traditional moderate-intensity continuous aerobic training (MICT). Results Twenty-one sedentary elderly men, aged 60–69 years, performed two exercise protocols: EJ-HIAT, consisting of 3 sets of 2−3-min cycling at 75−85%V̇O2peak with 1−2-min active rests at 50%V̇O2peak between sets, and MICT, consisting of 40-min cycling at 65%V̇O2peak. The completion rate, defined as the rate of participants who 1) did not demand withdrawal, 2) were not interrupted by the tester, and 3) did not change the workload during either exercise protocol, of EJ-HIAT was similar to that of MICT (EJ-HIAT: 100%, MICT: 95.2%). Maximal perceived exertion ratings assessed by Borg scale were also similar between EJ-HIAT and MICT. However, objectively measured maximal intensity assessed by %V̇O2peak was higher for EJ-HIAT than for MICT (EJ-HIAT: 86.0 ± 5.6%, MICT: 67.1 ± 6.4%). Conclusion These results suggested that EJ-HIAT has good feasibility and perceived exertion similar to MICT despite having higher objectively measured intensity than MICT. An intervention aimed as identifying the effects of EJ-HIAT on exercise tolerance should be performed in the future. Trial registration UMIN000021185 (February 26, 2016).
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Affiliation(s)
- Yosuke Osuka
- Research Team for Promoting Independence of the Elderly, Tokyo Metropolitan Institute of Gerontology, Itabashi, Tokyo Japan.,Space Biomedical Research Group, Astronaut and Operation Control Unit, Japan Aerospace Exploration Agency, Tsukuba, Ibaraki Japan
| | - Muneaki Matsubara
- Faculty of Medicine, Department of Cardiovascular Surgery, University of Tsukuba, Tsukuba, Ibaraki Japan
| | - Ai Hamasaki
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki Japan
| | - Yuji Hiramatsu
- Faculty of Medicine, Department of Cardiovascular Surgery, University of Tsukuba, Tsukuba, Ibaraki Japan
| | - Hiroshi Ohshima
- Space Biomedical Research Group, Astronaut and Operation Control Unit, Japan Aerospace Exploration Agency, Tsukuba, Ibaraki Japan
| | - Kiyoji Tanaka
- Faculty of Health and Sport Sciences, University of Tsukuba, Tsukuba, Ibaraki Japan
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29
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Bhati P, Bansal V, Moiz JA. Comparison of different volumes of high intensity interval training on cardiac autonomic function in sedentary young women. Int J Adolesc Med Health 2017; 31:/j/ijamh.ahead-of-print/ijamh-2017-0073/ijamh-2017-0073.xml. [PMID: 28837421 DOI: 10.1515/ijamh-2017-0073] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Accepted: 07/13/2017] [Indexed: 06/07/2023]
Abstract
Purpose The present study was conducted to compare the effects of low volume of high intensity interval training (LVHIIT) and high volume of high intensity interval training (HVHIIT) on heart rate variability (HRV) as a primary outcome measure, and on maximum oxygen consumption (VO2max), body composition, and lower limb muscle strength as secondary outcome measures, in sedentary young women. Methods Thirty-six participants were recruited in this study. The LVHIIT group (n = 17) performed one 4-min bout of treadmill running at 85%-95% maximum heart rate (HRmax), followed by 3 min of recovery by running at 70% HRmax, three times per week for 6 weeks. The HVHIIT group (n = 15) performed four times 4-min bouts of treadmill running at 85%-95% HRmax, interspersed with 3-min of recovery by running at 70% HRmax, 3 times per week for 6 weeks. All criterion measures were measured before and after training in both the groups. Results Due to attrition of four cases, data of 32 participants was used for analysis. A significant increase in high frequency (HF) power (p < 0.001) and decrease in the ratio of low frequency to high frequency power (LF/HF) ratio (p < 0.001) in HRV parameters, was observed post-HVHIIT, whereas, these variables did not change significantly (HF: p = 0.92, LF/HF ratio: p = 0.52) in LVHIIT group. Nevertheless, both the interventions proved equally effective in improving aerobic capacity (VO2max), body composition, and muscle strength. Conclusion The study results suggest that both LVHIIT and HVHIIT are equally effective in improving VO2max, body composition, and muscle strength, in sedentary young women. However, HVHIIT induces parasympathetic dominance as well, as measured by HRV.
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Affiliation(s)
- Pooja Bhati
- Centre for Physiotherapy and Rehabilitation Sciences, Jamia Millia Islamia (A Central University), New Delhi, India
| | - Vishal Bansal
- Department of Physiology, Vallabhbhai Patel Chest Institute, University of Delhi, Delhi-110007,India, Phone: +91-11-27402406
| | - Jamal Ali Moiz
- Centre for Physiotherapy and Rehabilitation Sciences, Jamia Millia Islamia (A Central University), New Delhi, India
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30
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Haraldsdottir K, Brickson S, Sanfilippo J, Dunn W, Watson A. In-season changes in heart rate recovery are inversely related to time to exhaustion but not aerobic capacity in rowers. Scand J Med Sci Sports 2017. [PMID: 28649720 DOI: 10.1111/sms.12934] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
To determine if in-season changes in heart rate recovery (HRR) are related to aerobic fitness and performance in collegiate rowers. Twenty-two female collegiate rowers completed testing before and after their competitive season. Body fat percentage (BF%) was determined by dual-energy X-ray absorptiometry. Maximal aerobic capacity (VO2max ) and time to exhaustion (Tmax ) were determined during maximal rowing ergometer testing followed by 1 minute of recovery. HRR was expressed absolutely and as a percentage of maximal HR (HRR%1 min ). Variables were compared using paired Wilcoxon tests. Multivariable regression models were used to predict in-season changes in HRR using changes in VO2max and Tmax , while accounting for changes in BF%. From preseason to post-season, VO2max and BF% decreased (3.98±0.42 vs 3.78±0.35 L/min, P=.002 and 23.8±3.4 vs 21.3±3.9%, P<.001, respectively), while Tmax increased (11.7±1.3 vs 12.6±1.3 min, P=.002), and HRR%1 min increased (11.1±2.7 vs 13.8±3.8, P=.001). In-season changes in VO2max were not associated with HRR%1 min (P>.05). In-season changes in Tmax were related to changes in HRR%1 min (β=-1.67, P=.006). In-season changes in BF% were not related to changes in HRR (P>.05 for all). HRR1 min and HRR%1 min were faster preseason to post-season, although the changes were unrelated to VO2max . Faster HRR%1 min post-season was inversely related to changes in Tmax . This suggests that HRR should not be used as a measure of aerobic capacity in collegiate rowers, but is a promising measure of training status in this population.
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Affiliation(s)
- K Haraldsdottir
- Department of Pediatrics, University of Wisconsin, Madison, WI, USA.,Department of Kinesiology, University of Wisconsin, Madison, WI, USA
| | - S Brickson
- Department of Orthopedics, University of Wisconsin, Madison, WI, USA
| | - J Sanfilippo
- Department of Orthopedics, University of Wisconsin, Madison, WI, USA
| | - W Dunn
- Department of Orthopedics, University of Wisconsin, Madison, WI, USA
| | - A Watson
- Department of Orthopedics, University of Wisconsin, Madison, WI, USA
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31
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Potential Universal Application of High-intensity Interval Training from Athletes and Sports Lovers to Patients. Keio J Med 2016; 66:19-24. [PMID: 27498746 DOI: 10.2302/kjm.2016-0006-ir] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recently, high-intensity interval training (HIIT) has received much attention as a promising exercise option not only to improve aerobic fitness, but also to prevent and improve lifestyle-related diseases. Epidemiological studies have shown that the exercise volume, as determined by the product of exercise intensity, duration, and frequency, has been shown to be important for improvements in muscle mitochondrial activity and subsequent improvements in aerobic fitness, insulin sensitivity, and metabolic variables. Therefore, continuous moderate-intensity training has been widely recommended. On the other hand, the main contributor of HIIT to improvements in aerobic fitness and metabolic variables is its high-intensity nature, and many recent studies have shown results favoring HIIT when compared with conventional continuous training, despite its shorter exercise duration and smaller exercise volume. In this review, we aim to show the possible universal application of HIIT in a hospital setting, where athletes, sports lovers, and patients have sought medical advice and have the opportunity to undergo detailed evaluations, including an exercise stress test. For athletes, HIIT is mandatory to achieve further improvements in aerobic fitness. For patients, though higher levels of motivation and careful evaluation are required, the time constraints of HIIT are smaller and both aerobic and resistance training can be expected to yield favorable results because of the high-intensity nature of HIIT.
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32
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Fit für die Rettung? Notf Rett Med 2016. [DOI: 10.1007/s10049-016-0143-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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33
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Williams BM, Kraemer RR. Comparison of Cardiorespiratory and Metabolic Responses in Kettlebell High-Intensity Interval Training Versus Sprint Interval Cycling. J Strength Cond Res 2016; 29:3317-25. [PMID: 26360962 DOI: 10.1519/jsc.0000000000001193] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The purpose of this study was to determine the effectiveness of a novel exercise protocol we developed for kettlebell high-intensity interval training (KB-HIIT) by comparing the cardiorespiratory and metabolic responses to a standard sprint interval cycling (SIC) exercise protocol. Eight men volunteered for the study and completed 2 preliminary sessions, followed by two 12-minute sessions of KB-HIIT and SIC in a counterbalanced fashion. In the KB-HITT session, 3 circuits of 4 exercises were performed using a Tabata regimen. In the SIC session, three 30-second sprints were performed, with 4 minutes of recovery in between the first 2 sprints and 2.5 minutes of recovery after the last sprint. A within-subjects' design over multiple time points was used to compare oxygen consumption (V[Combining Dot Above]O2), respiratory exchange ratio (RER), tidal volume (TV), breathing frequency (f), minute ventilation (VE), caloric expenditure rate (kcal·min), and heart rate (HR) between the exercise protocols. Additionally, total caloric expenditure was compared. A significant group effect, time effect, and group × time interaction were found for V[Combining Dot Above]O2, RER, and TV, with V[Combining Dot Above]O2 being higher and TV and RER being lower in the KB-HIIT compared with the SIC. Only a significant time effect and group × time interaction were found for f, VE, kcal·min, and HR. Additionally, total caloric expenditure was found to be significantly higher during the KB-HIIT. The results of this study suggest that KB-HIIT may be more attractive and sustainable than SIC and can be effective in stimulating cardiorespiratory and metabolic responses that could improve health and aerobic performance.
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Affiliation(s)
- Brian M Williams
- Department of Kinesiology and Health Studies, Southeastern Louisiana University, Hammond, Louisiana
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Matsuo T, So R, Shimojo N, Tanaka K. Effect of aerobic exercise training followed by a low-calorie diet on metabolic syndrome risk factors in men. Nutr Metab Cardiovasc Dis 2015; 25:832-838. [PMID: 26141942 DOI: 10.1016/j.numecd.2015.05.009] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 05/16/2015] [Accepted: 05/18/2015] [Indexed: 12/18/2022]
Abstract
BACKGROUND AND AIMS Whether low-volume, high-intensity, interval training (HIIT) is an adequate exercise method for improving metabolic risk factors is controversial. Moreover, it is not known if performing a short-term, low-calorie diet intervention (LCDi) after a HIIT program affects risk factors. This study investigated how an 8-week, 3 times/week exercise intervention (EXi) incorporating either HIIT or moderate-intensity continuous training (MICT) followed by a 4-week LCDi affects risk factors. METHODS AND RESULTS Twenty-six male workers with metabolic risk factors (47.4 ± 7.1 years; cardiorespiratory capacity (VO2peak) of 28.5 ± 3.9 ml/kg/min) were randomly assigned to either the HIIT (3 sets of 3-min cycling with a 2-min active rest between sets, 180 kcal) or MICT (45 min, 360 kcal) group. After the EXi, all subjects participated in a 4-week LCDi (4 counseling sessions). During the EXi, VO2peak improved more (P < 0.05) through HIIT (25.4 ± 14.6%) than through MICT (14.9 ± 12.8%), whereas improvements in body fat and HDL cholesterol were similar. During the LCDi, some risk factors improved further (P < 0.05) without any group differences, while VO2peak in the HIIT group decreased (P < 0.05) to the same level as in the MICT group. CONCLUSION VO2peak increased more with HIIT than with MICT during the EXi despite HIIT having a lower exercise volume than MICT, but this advantage of HIIT promptly disappeared through detraining. An intervention strategy consisting of 8 weeks of either HIIT or MICT followed by a 4-week LCDi has a positive effect on metabolic risk factors. CLINICAL TRIAL REGISTRATION UMIN11352.
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Affiliation(s)
- T Matsuo
- Hazard Evaluation and Epidemiology Research Group, National Institute of Occupational Safety and Health, Japan.
| | - R So
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Japan
| | - N Shimojo
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Japan
| | - K Tanaka
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Japan
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Brito-Gomes JLD, Perrier-Melo RJ, Wikstrom EA, Costa MDC. Improving aerobic capacity through active videogames: A randomized controlled trial. MOTRIZ: REVISTA DE EDUCACAO FISICA 2015. [DOI: 10.1590/s1980-65742015000300012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
AbstractThe rate of peak workload improvement between different types of Active Video Games (AVG) in young sedentary adults was investigated. Aerobic capacity improvement after a 6-week intervention between AVG types was also compared. Twenty participants, after baseline assessments, were randomized into one of three parallel groups: structured AVG (n= 6), unstructured AVG (n= 7) and a control group (n= 7). Participants played their respective AVG 3 times a week for 6-weeks (30 minutes-session). The control group maintained normal activities. Both structured and unstructured AVG improved peak workload after four weeks but only the structured group maintained this improvement through week five and six. Aerobic capacity improved in the unstructured (Pre: 36.0 ± 5.2ml.kg.min-¹,Post: 39.7 ± 4.9ml.kg.min-¹, p = .038) and structured AVG (Pre: 39.0 ± 5.9ml.kg.min-¹,Post: 47.8 ± 4.3ml.kg.min-¹, p = .006) groups. Structured AVG provide greater health benefits to aerobic capacity and peak workload in young sedentary but otherwise healthy males relative to unstructured AVG.
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Holloway TM, Bloemberg D, da Silva ML, Quadrilatero J, Spriet LL. High-intensity interval and endurance training are associated with divergent skeletal muscle adaptations in a rodent model of hypertension. Am J Physiol Regul Integr Comp Physiol 2015; 308:R927-34. [DOI: 10.1152/ajpregu.00048.2015] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 04/08/2015] [Indexed: 12/11/2022]
Abstract
Skeletal muscle is extremely adaptable to a variety of metabolic challenges, as both traditional moderate-intensity endurance (ET) and high-intensity interval training (HIIT) increases oxidative potential in a coordinated manner. Although these responses have been clearly demonstrated in healthy individuals, it remains to be determined whether both produce similar responses in the context of hypertension, one of the most prevalent and costly diseases worldwide. Therefore, in the current study, we used the Dahl sodium-sensitive rat, a model of hypertension, to determine the molecular responses to 4 wk of either ET or HIIT in the red (RG) and white gastrocnemius (WG) muscles. In the RG, both ET and HIIT increased the content of electron transport chain proteins and increased succinate dehydrogenase (SDH) content in type I fibers. Although both intensities of exercise shifted fiber type in RG (increased IIA, decreased IIX), only HIIT was associated with a reduction in endothelial nitric oxide synthase and an increase in HIF-1α proteins. In the WG, both ET and HIIT increased markers of the electron transport chain; however, HIIT decreased SDH content in a fiber-specific manner. ET increased type IIA, decreased IIB fibers, and increased capillarization, while, in contrast, HIIT increased the percentage of IIB fibers, decreased capillary-to-fiber ratios, decreased endothelial nitric oxide synthase, and increased hypoxia inducible factor-1α (HIF-1α) protein. Altogether, these data show that unlike in healthy animals, ET and HIIT have divergent effects in the skeletal muscle of hypertensive rats. This suggests ET may be optimal at improving the oxidative capacity of skeletal muscle in animals with hypertension.
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Affiliation(s)
- Tanya M. Holloway
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada; and
| | - Darin Bloemberg
- Department of Kinesiology, University of Waterloo, Waterloo, Ontario, Canada
| | - Mayne L. da Silva
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada; and
| | - Joe Quadrilatero
- Department of Kinesiology, University of Waterloo, Waterloo, Ontario, Canada
| | - Lawrence L. Spriet
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada; and
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How can age and lifestyle variables affect DNA damage, repair capacity and endogenous biomarkers of oxidative stress? Exp Gerontol 2015; 62:45-52. [DOI: 10.1016/j.exger.2015.01.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Revised: 01/05/2015] [Accepted: 01/06/2015] [Indexed: 12/31/2022]
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Grace FM, Herbert P, Ratcliffe JW, New KJ, Baker JS, Sculthorpe NF. Age related vascular endothelial function following lifelong sedentariness: positive impact of cardiovascular conditioning without further improvement following low frequency high intensity interval training. Physiol Rep 2015; 3:3/1/e12234. [PMID: 25626864 PMCID: PMC4387763 DOI: 10.14814/phy2.12234] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Aging is associated with diffuse impairments in vascular endothelial function and traditional
aerobic exercise is known to ameliorate these changes. High intensity interval training (HIIT) is
effective at improving vascular function in aging men with existing disease, but its effectiveness
remains to be demonstrated in otherwise healthy sedentary aging. However, the frequency of commonly
used HIIT protocols may be poorly tolerated in older cohorts. Therefore, the present study
investigated the effectiveness of lower frequency HIIT (LfHIIT) on
vascular function in a cohort of lifelong sedentary (SED; n
=22, age 62.7 ± 5.2 years) men compared with a positive
control group of lifelong exercisers (LEX; n = 17, age 61.1 ± 5.4
years). The study consisted of three assessment phases; enrolment to the study (Phase A), following
6 weeks of conditioning exercise in SED (Phase B) and following 6 weeks of low frequency HIIT in
both SED and LEX (LfHIIT; Phase C). Conditioning exercise improved FMD
in SED (3.4 ± 1.5% to 4.9 ± 1.1%; P
<0.01) such that the difference between groups on enrolment (3.4
± 1.5% vs. 5.3 ± 1.4%; P <0.01) was abrogated. This was maintained but not further improved following
LfHIIT in SED whilst FMD remained unaffected by
LfHIIT in LEX. In conclusion, LfHIIT is
effective at maintaining improvements in vascular function achieved during conditioning exercise in
SED. LfHIIT is a well‐tolerated and effective exercise mode for
reducing cardiovascular risk and maintaining but does not improve vascular function beyond that
achieved by conditioning exercise in aging men, irrespective of fitness level. The effects of low frequency high intensity interval training (HIIT) on vascular endothelial
function in lifelong sedentary men remains currently unknown. The present study examined the impact
of low frequency HIIT following conditioning exercise on low determinants of vascular endothelial
function and angiogenic biomarkers in aging men compared with a positive control group of similarly
aged. The major findings of this study indicate that low frequency HIIT is a well‐tolerated
and effective exercise mode for reducing cardiovascular risk and maintaining but not improving
endothelial function beyond that achieved by conditioning exercise in aging men, irrespective of
fitness level.
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Affiliation(s)
- Fergal M Grace
- Institute of Clinical Exercise & Health Sciences, School of Science and Sport, University of the West of Scotland, Hamilton, UK
| | - Peter Herbert
- Institute of Clinical Exercise & Health Sciences, School of Science and Sport, University of the West of Scotland, Hamilton, UK University of Wales Trinity Saint David, CamarthenWales, UK
| | - John W Ratcliffe
- Institute of Clinical Exercise & Health Sciences, School of Science and Sport, University of the West of Scotland, Hamilton, UK
| | - Karl J New
- School of Health Sport and Professional Practice, University of South Wales, Wales, UK
| | - Julien S Baker
- Institute of Clinical Exercise & Health Sciences, School of Science and Sport, University of the West of Scotland, Hamilton, UK
| | - Nicholas F Sculthorpe
- Institute of Clinical Exercise & Health Sciences, School of Science and Sport, University of the West of Scotland, Hamilton, UK
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Alfieri A, Martone D, Randers MB, Labruna G, Mancini A, Nielsen JJ, Bangsbo J, Krustrup P, Buono P. Effects of long-term football training on the expression profile of genes involved in muscle oxidative metabolism. Mol Cell Probes 2014; 29:43-7. [PMID: 25444938 DOI: 10.1016/j.mcp.2014.11.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Revised: 10/28/2014] [Accepted: 11/12/2014] [Indexed: 11/17/2022]
Abstract
We investigated whether long-term recreational football training affects the expression of health-related biochemical and molecular markers in healthy untrained subjects. Five untrained healthy men trained for 1 h 2.4 times/week for 12 weeks and 1.3 times/week for another 52 weeks. Blood samples and a muscle biopsy from the vastus lateralis were collected at T0 (pre intervention) and at T1 (post intervention). Gene expression was measured by RTqPCR on RNA extracted from muscle biopsies. The expression levels of the genes principally involved in energy metabolism (PPARγ, adiponectin, AMPKα1/α2, TFAM, NAMPT, PGC1α and SIRT1) were measured at T0 and T1. Up-regulation of PPARγ (p < 0.0005), AMPKα1 (p < 0.01), AMPKα2 (p < 0.0005) and adiponectin was observed at T1 vs T0. Increases were also found in the expression of TFAM (p < 0.001), NAMPT (p < 0.01), PGC1α (p < 0.01) and SIRT1 (p < 0.01), which are directly or indirectly involved in the glucose and lipid oxidative metabolism. Multiple linear regression analysis revealed that fat percentage was independently associated with NAMPT, PPARγ and adiponectin expression. In conclusion, long-term recreational football training could be a useful tool to improve the expression of muscle molecular biomarkers that are correlated to oxidative metabolism in healthy males.
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Affiliation(s)
- A Alfieri
- Department of Movement Sciences and Wellness (DiSMEB), University Parthenope, Naples, Italy; CEINGE - Biotecnologie Avanzate, Naples, Italy
| | - D Martone
- CEINGE - Biotecnologie Avanzate, Naples, Italy
| | - M B Randers
- Copenhagen Centre for Team Sport and Health, Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark
| | | | - A Mancini
- Department of Movement Sciences and Wellness (DiSMEB), University Parthenope, Naples, Italy; CEINGE - Biotecnologie Avanzate, Naples, Italy
| | - J J Nielsen
- Copenhagen Centre for Team Sport and Health, Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark
| | - J Bangsbo
- Copenhagen Centre for Team Sport and Health, Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark
| | - P Krustrup
- Copenhagen Centre for Team Sport and Health, Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark; Sport and Health Sciences, College of Life and Environmental Sciences, University of Exeter, United Kingdom
| | - P Buono
- Department of Movement Sciences and Wellness (DiSMEB), University Parthenope, Naples, Italy; IRCCS SDN, Naples, Italy.
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