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Van Every DW, D'Souza AC, Phillips SM. Hormones, Hypertrophy, and Hype: An Evidence-Guided Primer on Endogenous Endocrine Influences on Exercise-Induced Muscle Hypertrophy. Exerc Sport Sci Rev 2024; 52:117-125. [PMID: 39190607 DOI: 10.1249/jes.0000000000000346] [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: 08/29/2024]
Abstract
We review the evidence indicating that endogenous changes in these hormones, including testosterone, growth hormone, insulin growth factor-1, and estrogen, and their proposed anabolic effects contribute to and augment resistance exercise training (RET)-induced hypertrophy. Additionally, we provide recommendations for gold-standard methodological rigor to establish best practices for verifying menstrual phases as part of their research, ultimately enhancing our understanding of the impact of ovarian hormones on RET-induced adaptations.
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Ivanic B, Cronström A, Johansson K, Ageberg E. Efficacy of exercise interventions on prevention of sport-related concussion and related outcomes: a systematic review and meta-analysis. Br J Sports Med 2024:bjsports-2024-108260. [PMID: 39242177 DOI: 10.1136/bjsports-2024-108260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/17/2024] [Indexed: 09/09/2024]
Abstract
OBJECTIVE To review the efficacy of exercise interventions on sport-related concussion (SRC) incidence, as well as on linear and rotational head accelerations, and isometric neck strength and to assess reporting completeness of exercise interventions using the Consensus on Exercise Reporting Template (CERT). DESIGN Systematic review and meta-analysis, according to the Prisma in Exercise, Rehabilitation, Sport medicine and SporTs science guidelines. DATA SOURCES Six databases (MEDLINE, Embase, CINAHL, Scopus, Web of Science CC and SPORTDiscus) were searched up to 26 June 2023. ELIGIBILITY CRITERIA FOR SELECTING STUDIES Randomised controlled trials (RCTs), cluster RCTs or quasi-experimental studies, evaluating exercise interventions on SRC incidence, linear and rotational head accelerations, and/or isometric neck strength in male and/or female athletes of any age, and/or in a healthy general population. RESULTS A total of 26 articles were included. A large effect size was observed for resistance training (RT) on isometric neck strength (standardised mean difference (SMD) 0.85; 95% CI 0.57 to 1.13; high-quality evidence). Non-significant effect sizes were observed for neuromuscular warm-up programmes on SRC incidence (risk ratio 0.69; 95% CI 0.39 to 1.23; low-quality evidence), or for RT on linear head acceleration (SMD -0.43; 95% CI -1.26 to 0.40; very low-quality evidence) or rotational head acceleration (SMD 0.08; 95% CI -0.61 to 0.77; low-quality evidence). No studies assessed the impact of RT on SRC incidence. CERT scores ranged from 4 to 16 (out of 19) with median score of 11.5 (IQR 9-13). CONCLUSION RT increases isometric neck strength, but the effect on SRC incidence is unknown. More adequately powered and rigorous trials are needed to evaluate the effect of exercise interventions on SRC incidence, and on linear and rotational head accelerations. Future studies should follow CERT guidelines, as the included interventions were generally not reported in sufficient detail for accurate replication. PROSPERO REGISTRATION NUMBER CRD42023435033.
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Affiliation(s)
- Branimir Ivanic
- Department of Health Sciences, Faculty of Medicine, Lund University, Lund, Sweden
| | - Anna Cronström
- Department of Health Sciences, Faculty of Medicine, Lund University, Lund, Sweden
| | - Kajsa Johansson
- Department of Health, Medicine and Caring Sciences, Unit of Physiotherapy, Linköping University, Linköping, Sweden
| | - Eva Ageberg
- Department of Health Sciences, Faculty of Medicine, Lund University, Lund, Sweden
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Ioannidou P, Dóró Z, Schalla J, Wätjen W, Diel P, Isenmann E. Analysis of combinatory effects of free weight resistance training and a high-protein diet on body composition and strength capacity in postmenopausal women - A 12-week randomized controlled trial. J Nutr Health Aging 2024; 28:100349. [PMID: 39232439 DOI: 10.1016/j.jnha.2024.100349] [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: 05/29/2024] [Revised: 08/22/2024] [Accepted: 08/23/2024] [Indexed: 09/06/2024]
Abstract
BACKGROUND Menopause has a significant impact on the endocrine system of middle-aged women, resulting in a loss of skeletal muscle mass (SMM), changes in fat mass (FM) and a reduction in strength capacity. Resistance training (RT) and a high-protein diet (HPD) are effective methods for maintaining or increasing SMM. This study aims to determine the effects of HPD and RT on body composition, muscle thickness and strength capacity in postmenopausal women. METHODS In total 55 healthy postmenopausal women (age: 58.2 ± 5.6 years, weight 69.1 ± 9.6 kg, height 166.5 ± 6.5 cm) successfully participated in the study. The women were randomly assigned to either group: training + protein (2.5 g/kg fat-free mass (FFM)) (n = 15; TP); only training (n = 12; T); only protein (2.5 g/kg FFM) (n = 14; CP) or control (n = 14; C). TP and T performed RT for 12 weeks with three training sessions and five exercises each. CP and C were prohibited from training during the period. The main parameters analysed for body composition were FFM, SMM, FM, muscle thickness of the M. rectus femoris, M. biceps femoris, M. triceps brachii and M. biceps brachii muscles. Strength was tested using a dynamometer for grip strength and 1-RM in the squat (BBS) and deadlift (DL). RESULTS The SMM significantly increased by RT (TP: (Δ+1.4 ± 0.9 kg; p < 0.05; d = 0.4; T: Δ+1.2 ± 1.3kg; p < 0.05; d = 0.3) and FM could be reduced only in T: (Δ-2.4 ± 2.9 kg; p < 0.05; d = 0.3). In muscle thickness a significant increase in the M. biceps brachii in both training groups (TP: (Δ+0.4 ± 0.3 cm; p < 0.05; d = 1.6; T: (Δ+0.3 ± 0.3 cm; p < 0.05; d = 0.9) and in M. biceps femoris only in TP (Δ+0.3 ± 0.4 cm; p < 0.05; d = 0.9) were observed. HPD without training does not affect body composition, A significant increase in grip strength (TP: Δ+4.7 ± 2.4 kg; (p < 0.05; d = 1.5; T: (Δ+3.6 ± 3.0 kg; p < 0.05; d = 0.8), in BBS (TP: (Δ+30.0 ± 14.2 kg; p < 0.05; d = 1.5; T: (Δ+34.0 ± 12.0 kg; p < 0.05; d = 2.4) and in DL (TP: (Δ+20.8 ± 10.3 kg; p < 0.05; d = 1.6; T: (Δ+22.1 ± 7.6 kg; p < 0.05; d = 2.0) was observed in both training groups. The CP also recorded a significant increase in the BBS (Δ+7.5 ± 5.4 kg; p < 0.05; d = 0.4) and in DL (Δ+5.5 ± 7.7 kg; p < 0.05; d = 0.5). No significant differences were detected for TP and T for any of the parameters. CONCLUSION The results indicate that RT enhances body composition and strength capacity in postmenopausal women and is a preventive strategy against muscle atrophy. Besides HPD without training has a trivial significant effect on BBS and DL. HPD with RT has no clear additive effect on body composition and strength capacity. Further studies are needed to confirm these observations.
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Affiliation(s)
- Paulina Ioannidou
- Institute for Cardiovascular Research and Sports Medicine, Department of Molecular and Cellular Sports Medicine, German Sports University Cologne, Cologne, Germany.
| | - Zsuzsanna Dóró
- Biofunctionality of Secondary Plant Compounds, Institute of Agricultural and Nutritional Martin-Luther-Universität Halle-Wittenberg, Halle, Germany
| | - Jan Schalla
- Department of Fitness and Health, IST University of Applied Sciences, Dusseldorf, Germany
| | - Wim Wätjen
- Biofunctionality of Secondary Plant Compounds, Institute of Agricultural and Nutritional Martin-Luther-Universität Halle-Wittenberg, Halle, Germany
| | - Patrick Diel
- Institute for Cardiovascular Research and Sports Medicine, Department of Molecular and Cellular Sports Medicine, German Sports University Cologne, Cologne, Germany
| | - Eduard Isenmann
- Institute for Cardiovascular Research and Sports Medicine, Department of Molecular and Cellular Sports Medicine, German Sports University Cologne, Cologne, Germany; Department of Fitness and Health, IST University of Applied Sciences, Dusseldorf, Germany
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Kassiano W, Costa BDDV, Kunevaliki G, Lisboa F, Tricoli I, Francsuel J, Lima L, Stavinski N, Cyrino ES. Bigger Calves from Doing Higher Resistance Training Volume? Int J Sports Med 2024; 45:739-747. [PMID: 38684187 DOI: 10.1055/a-2316-7885] [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: 05/02/2024]
Abstract
We compared the effects of different weekly calf training sets on muscle size changes. Sixty-one untrained young women performed a calf training program for 6 weeks, 3 d·wk-1, with differences in resistance training volume. The participants were randomly assigned to one of the three groups: 6-SET, 9-SET, and 12-SET weekly calf training sets. The calf raise exercise was performed in sets of 15-20 repetitions maximum. The muscle thickness measurements of medial gastrocnemius (MG), lateral gastrocnemius (LG), and soleus (SOL) were taken via B-mode ultrasound. We used the sum of the three-muscle thickness as a proxy for the triceps surae (TSSUM). The 12-SET group elicited greater increases than the 6-SET in LG (6-SET=+ 8.1% vs. 12-SET=+ 14.3%; P=0.017), SOL (6-SET=+ 6.7% vs. 12-SET=+ 12.7%; P=0.024), and TSSUM (6-SET=+ 6.9% vs. 12-SET=+ 12.0%; P=0.005), but there was no significant difference in MG changes (6-SET=+ 6.6% vs. 12-SET=+ 9.9%; P=0.067). There were no significant differences when comparing 9-SET vs. 6-SET and 12-SET (P≥0.099). Although all groups experienced calf muscle hypertrophy, our results suggest that the higher dose range may optimize triceps surae muscle size gains.
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Affiliation(s)
- Witalo Kassiano
- Metabolism, Nutrition and Exercise Laboratory, Centre of Physical Education and Sport, State University of Londrina, Brazil
| | | | - Gabriel Kunevaliki
- Metabolism, Nutrition and Exercise Laboratory, Centre of Physical Education and Sport, State University of Londrina, Brazil
| | - Felipe Lisboa
- Metabolism, Nutrition and Exercise Laboratory, Centre of Physical Education and Sport, State University of Londrina, Brazil
| | - Ian Tricoli
- Metabolism, Nutrition and Exercise Laboratory, Centre of Physical Education and Sport, State University of Londrina, Brazil
| | - Jarlisson Francsuel
- Metabolism, Nutrition and Exercise Laboratory, Centre of Physical Education and Sport, State University of Londrina, Brazil
| | - Luis Lima
- Metabolism, Nutrition and Exercise Laboratory, Centre of Physical Education and Sport, State University of Londrina, Brazil
| | - Natã Stavinski
- Metabolism, Nutrition and Exercise Laboratory, Centre of Physical Education and Sport, State University of Londrina, Brazil
| | - Edilson S Cyrino
- Metabolism, Nutrition and Exercise Laboratory, Centre of Physical Education and Sport, State University of Londrina, Brazil
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Desai I, Wewege MA, Jones MD, Clifford BK, Pandit A, Kaakoush NO, Simar D, Hagstrom AD. The Effect of Creatine Supplementation on Resistance Training-Based Changes to Body Composition: A Systematic Review and Meta-analysis. J Strength Cond Res 2024:00124278-990000000-00483. [PMID: 39074168 DOI: 10.1519/jsc.0000000000004862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/31/2024]
Abstract
ABSTRACT Desai, I, Wewege, MA, Jones, MD, Clifford, BK, Pandit, A, Kaakoush, NO, Simar, D, and Hagstrom, AD. The effect of creatine supplementation on resistance training-based changes to body composition: A systematic review and meta-analysis. J Strength Cond Res XX(X): 000-000, 2024-The purpose of this review was to determine the added effect of creatine supplementation on changes in body composition with resistance training in adults younger than 50 years. The review protocol was preregistered on the Open Science Framework (osf.io/x48a6/). Our primary outcome was lean body mass (LBM); secondary outcomes were body fat percentage (%) and body fat mass (kg). We performed a random-effects meta-analysis in R using the metafor package. Subgroup analyses were conducted to examine the effects of training status and use of a carbohydrate drink with creatine. We conducted a meta-regression to examine the moderating effect of total training volume. Statistical significance was set at p < 0.05. One thousand six hundred ninety-four records were screened, and 67 full-text articles were assessed for eligibility. Twelve studies were included in the meta-analysis. Fifty-two percentages of the studies had low risk, 41% some concerns, and 7% high risk of bias. Compared with resistance training (RT) alone, creatine supplementation increased LBM by 1.14 kg (95% CI 0.69 to 1.59), and reduced body fat percentage by -0.88% (95% CI -1.66 to -0.11) and body fat mass by -0.73 kg (95% CI -1.34 to -0.11). There were no differences between training status or carbohydrate subgroups. Training volume was not associated with effect size in all outcomes; 7 g or 0.3 g/kg of body mass of creatine per day is likely to increase LBM by 1 kg and reduce fat mass by 0.7 kg more than RT alone. Concurrent carbohydrate ingestion did not enhance the hypertrophy benefits of creatine.
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Affiliation(s)
- Imtiaz Desai
- School of Health Sciences, University of New South Wales, Sydney, Australia
| | - Michael A Wewege
- School of Health Sciences, University of New South Wales, Sydney, Australia
- Center for Pain IMPACT, Neuroscience Research Australia, Sydney, Australia; and
| | - Matthew D Jones
- School of Health Sciences, University of New South Wales, Sydney, Australia
- Center for Pain IMPACT, Neuroscience Research Australia, Sydney, Australia; and
| | - Briana K Clifford
- School of Health Sciences, University of New South Wales, Sydney, Australia
| | - Anurag Pandit
- School of Health Sciences, University of New South Wales, Sydney, Australia
| | - Nadeem O Kaakoush
- School of Biomedical Sciences, University of New South Wales, Sydney, Australia
| | - David Simar
- School of Health Sciences, University of New South Wales, Sydney, Australia
| | - Amanda D Hagstrom
- School of Health Sciences, University of New South Wales, Sydney, Australia
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Nolan D, Horgan P, MacNamara A, Egan B. "Male athletes play well to feel good, and female athletes feel good to play well": Attitudes, beliefs, and practices pertaining to perceived sex-related differences in communication and interpersonal approach of strength and conditioning coaches in international women's rugby union. J Sports Sci 2024; 42:1289-1298. [PMID: 39118398 DOI: 10.1080/02640414.2024.2388992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 07/30/2024] [Indexed: 08/10/2024]
Abstract
Effective communication and rapport building with athletes are key tenets of coaching. As the majority of empirical evidence to date has adopted an androcentric view of strength and conditioning, a potential knowledge gap exists regarding sex-related differences in physical preparation and coaching approaches. Therefore, this study explored the attitudes, beliefs and practices of strength and conditioning coaches (n = 8; M/F, 6/2) in elite level (international) women's rugby union using semi-structured interviews (mean ±standard deviation duration 59 ± 15 min). The interviews explored differences in coaching practices for elite female rugby players compared to males, with a specific focus on the interpersonal aspects of the athlete-coach relationship. Reflexive thematic analysis was used to generate a rich qualitative dataset. The analysis resulted in the identification of higher order themes: athlete engagement, and interpersonal approach. The coaches in this study consistently perceived important differences between male and female players in factors related to engagement and interpersonal approach. Coaches adopted differing coaching practices for male and female athletes. This study provides important contextual evidence for the understanding of differences in the interpersonal relationships of female rugby players compared to male athletes from the perspective of elite-level strength coaches.
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Affiliation(s)
- David Nolan
- School of Health and Human Performance, Dublin City University, Dublin, Ireland
| | | | - Aine MacNamara
- School of Health and Human Performance, Dublin City University, Dublin, Ireland
| | - Brendan Egan
- School of Health and Human Performance, Dublin City University, Dublin, Ireland
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Soares ALC, Carvalho RF, Mogami R, Meirelles CDM, Gomes PSC. Effect of resistance training on quadriceps femoris muscle thickness obtained by ultrasound: A systematic review with meta-analysis. J Bodyw Mov Ther 2024; 39:270-278. [PMID: 38876638 DOI: 10.1016/j.jbmt.2024.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 11/26/2023] [Accepted: 02/25/2024] [Indexed: 06/16/2024]
Abstract
OBJECTIVE The present study aimed to determine the magnitude and intervention time of resistance training required to generate adaptations in the muscle thickness of the quadriceps muscle obtained by ultrasound in healthy adults. METHOD A systematic review with meta-analysis was conducted on studies recovered from Pubmed, Web of Science, and Scopus databases up to March 2022. The study selection process was carried out by two independent researchers, with the presence of a third researcher in case of disagreements. The methodological quality of the studies was determined with the TESTEX scale, and the risk of bias analysis was determined using Cochrane's RoB 2.0 tool. The meta-analysis used the inverse of the variance with a fixed model, and the effect size was reported by the standardized mean difference (SMD) with a confidence interval of 95%. RESULTS Ten studies were included in a meta-analysis. The overall analysis of the studies demonstrated an SMD = 0.35 [95% CI: 0.13-0.56] (P = 0.002), with a low heterogeneity of I2 = 0% (P = 0.52). No publication bias was detected using a funnel plot followed by Egger's test (P = 0.06). The degree of certainty of the meta-analysis was high using the GRADE tool. CONCLUSION We found that resistance training can generate significant average increases of 16.6% in muscle thickness obtained by ultrasound in the quadriceps femoris muscles of healthy adults. However, the subgroup analysis showed that significant effect sizes were only observed after eight weeks of training.
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Affiliation(s)
- André Luiz Conveniente Soares
- Laboratory Crossbridges, Institute of Physical Education and Sports, Rio de Janeiro State University, Rio de Janeiro - RJ, Brazil.
| | - Ramon Franco Carvalho
- Laboratory Crossbridges, Institute of Physical Education and Sports, Rio de Janeiro State University, Rio de Janeiro - RJ, Brazil.
| | - Roberto Mogami
- Faculty of Medical Sciences, Rio de Janeiro State University, Rio de Janeiro - RJ, Brazil.
| | | | - Paulo Sergio Chagas Gomes
- Laboratory Crossbridges, Institute of Physical Education and Sports, Rio de Janeiro State University, Rio de Janeiro - RJ, Brazil.
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Ramos-Campo DJ, Benito-Peinado PJ, Andreu-Caravaca L, Rojo-Tirado MA, Rubio-Arias JÁ. Efficacy of Split Versus Full-Body Resistance Training on Strength and Muscle Growth: A Systematic Review With Meta-Analysis. J Strength Cond Res 2024; 38:1330-1340. [PMID: 38595233 DOI: 10.1519/jsc.0000000000004774] [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: 04/11/2024]
Abstract
ABSTRACT Ramos-Campo, DJ, Benito-Peinado, PJ, Caravaca, LA, Rojo-Tirado, MA, and Rubio-Arias, JÁ. Efficacy of split versus full-body resistance training on strength and muscle growth: a systematic review with meta-analysis. J Strength Cond Res 38(7): 1330-1340, 2024-No previous study has systematically compared the effect of 2 resistance training routines commonly used to increase muscle mass and strength (i.e., split [Sp] and full-body [FB] routines). Our objective was to conduct a systematic review and meta-analysis following PRISMA guidelines to compare the effects on strength gains and muscle growth in healthy adults. 14 studies (392 subjects) that compared Sp and FB routines in terms of strength adaptations and muscle growth were included. Regarding the effects of the Sp or FB routine on both bench press and lower limbs strength, the magnitude of the change produced by both routines was similar (bench press: mean difference [MD] = 1.19; [-1.28, 3.65]; p = 0.34; k = 14; lower limb: MD = 2.47; [-2.11, 7.05]; p = 0.29; k = 14). Concerning the effect of the Sp vs. FB routine on muscle growth, similar effects were observed after both routines in the cross-sectional area of the elbow extensors (MD = 0.30; [-2.65, 3.24]; p = 0.84; k = 4), elbow flexors (MD = 0.17; [-2.54, 2.88]; p = 0.91; k = 5), vastus lateralis (MD = -0.08; [-1.82, 1.66]; p = 0.93; k = 5), or lean body mass (MD = -0.07; [-1.59, 1.44]; p = 0.92; k = 6). In conclusion, the present systematic review and meta-analysis provides solid evidence that the use of Sp or FB routines within a resistance training program does not significantly impact either strength gains or muscle hypertrophy when volume is equated. Consequently, individuals are free to confidently select a resistance training routine based on their personal preferences.
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Affiliation(s)
- Domingo J Ramos-Campo
- LFE Research Group, Department of Health and Human Performance, Faculty of Physical Activity and Sport Science (INEF), Universidad Politécnica de Madrid, Madrid, Spain
| | - Pedro J Benito-Peinado
- LFE Research Group, Department of Health and Human Performance, Faculty of Physical Activity and Sport Science (INEF), Universidad Politécnica de Madrid, Madrid, Spain
| | - Luis Andreu-Caravaca
- Sports Physiology Department, Faculty of Health Sciences, UCAM Universidad Católica San Antonio de Murcia, Murcia, Spain
- Facultad de Deporte. UCAM Universidad Católica de Murcia, Murcia, Spain; and
| | - Miguel A Rojo-Tirado
- LFE Research Group, Department of Health and Human Performance, Faculty of Physical Activity and Sport Science (INEF), Universidad Politécnica de Madrid, Madrid, Spain
| | - Jacobo Á Rubio-Arias
- Health Research Center, Department of Education, Faculty of Educational Sciences, University of Almería, Almería, Spain
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Swinton PA, Schoenfeld BJ, Murphy A. Dose-Response Modelling of Resistance Exercise Across Outcome Domains in Strength and Conditioning: A Meta-analysis. Sports Med 2024; 54:1579-1594. [PMID: 38652410 PMCID: PMC11239729 DOI: 10.1007/s40279-024-02006-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/14/2024] [Indexed: 04/25/2024]
Abstract
BACKGROUND Resistance exercise is the most common training modality included within strength and conditioning (S&C) practice. Understanding dose-response relationships between resistance training and a range of outcomes relevant to physical and sporting performance is of primary importance for quality S&C prescription. OBJECTIVES The aim of this meta-analysis was to use contemporary modelling techniques to investigate resistance-only and resistance-dominant training interventions, and explore relationships between training variables (frequency, volume, intensity), participant characteristics (training status, sex), and improvements across a range of outcome domains including maximum strength, power, vertical jump, change of direction, and sprinting performance. METHODS Data were obtained from a database of training studies conducted between 1962 and 2018, which comprised healthy trained or untrained adults engaged in resistance-only or resistance-dominant interventions. Studies were not required to include a control group. Standardized mean difference effect sizes were calculated and interventions categorized according to a range of training variables describing frequency (number of sessions per week), volume (number of sets and repetitions performed), overall intensity (intensity of effort and load, categorised as low, medium or high), and intensity of load (represented as % of one-repetition maximum [1RM] prescribed). Contemporary modelling techniques including Bayesian mixed-effects meta-analytic models were fitted to investigate linear and non-linear dose-responses with models compared based on predictive accuracy. RESULTS Data from a total of 295 studies comprising 535 groups and 6,710 participants were included with analyses conducted on time points ≤ 26 weeks. The best performing model included: duration from baseline, average number of sets, and the main and interaction effects between outcome domain and intensity of load (% 1RM) expressed non-linearly. Model performance was not improved by the inclusion of participant training status or sex. CONCLUSIONS The current meta-analysis represents the most comprehensive investigation of dose-response relationships across a range of outcome domains commonly targeted within strength and conditioning to date. Results demonstrate the magnitude of improvements is predominantly influenced by training intensity of load and the outcome measured. When considering the effects of intensity as a % 1RM, profiles differ across outcome domains with maximum strength likely to be maximised with the heaviest loads, vertical jump performance likely to be maximised with relatively light loads (~ 30% 1RM), and power likely to be maximised with low to moderate loads (40-70% 1RM).
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Affiliation(s)
- Paul Alan Swinton
- School of Health Sciences, Robert Gordon University, Garthdee Road, Aberdeen, AB10 7QG, UK.
| | - Brad J Schoenfeld
- Department of Exercise Science and Recreation, CUNY Lehman College, Bronx, NY, USA
| | - Andrew Murphy
- School of Health Sciences, Robert Gordon University, Garthdee Road, Aberdeen, AB10 7QG, UK
- Greater Western Sydney Giants, Sydney, NSW, Australia
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Hagerupsen K, Pedersen S, Giller NB, Thomassen NK, Heitmann KA, Sagelv EH, Osborne JO, Johansen KR. Comparison of resistance training using barbell half squats and trap bar deadlifts on maximal strength, power performance, and lean mass in recreationally active females: an eight-week randomised trial. BMC Sports Sci Med Rehabil 2024; 16:124. [PMID: 38816857 PMCID: PMC11140948 DOI: 10.1186/s13102-024-00911-8] [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: 02/22/2024] [Accepted: 05/21/2024] [Indexed: 06/01/2024]
Abstract
BACKGROUND The aim of this study was to investigate the effect of high load resistance training using barbell half squats compared with trap bar deadlifts on maximal strength, power performance, and lean mass in recreationally active females. METHODS Twenty-two recreationally active female participants (age: 26.9 ± 7.7 yrs.; height: 166.0 ± 5.1 cm; weight: 68.6 ± 9.9 kg) were randomly assigned to either a barbell half squat group (SG: n = 10) or trap bar deadlift group (DG: n = 12). Training consisted of twice-weekly sessions for eight weeks. Both groups completed one-repetition maximum (1RM) testing for both barbell half squat and trap bar deadlift groups. Countermovement jump (CMJ) and sprint performance were also assessed. Total body (TBLM) and leg lean mass (LLM) were measured with dual-energy x-ray absorptiometry. Between-group differences were analysed using analysis of covariance. RESULTS SG tended to improve 1RM half squat (21.0 ± 11.5 kg vs. 13.1 ± 7.5 kg) more than DG (mean difference (MD): 8.0 kg, 95% CI: -0.36 - 16.3 kg). A similar pattern in favour of DG (18.4 ± 11.2 vs. 11.7 ± 8.1 kg) compared to SG was observed (MD: 6.5 kg, 95% CI: -2.5 - 15.6 kg). No between-group differences for sprint, jump or lean body mass changes was observed. For groups combined, the following changes in CMJ (2.0 ± 2.4 cm), 5-m sprint (-0.020 ± 0.039 s), 15-m sprint (-0.055 ± 0.230 s), TBLM (0.84 ± 1.12 kg), and LLM (0.27 ± 0.59 kg) was observed. CONCLUSIONS An exercise intervention consisting of half squats or trap bar deadlift were associated with improved muscle strength, power, and lean mass. Our findings suggests that in recreationally active females, exercise selection is less of a concern provided that heavy loads are applied, and relevant muscle groups are targeted.
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Affiliation(s)
- Karianne Hagerupsen
- School of Sport Sciences, Faculty of Health Sciences, UiT the Arctic University of Norway, Postboks 6050 Langnes, Tromsø, 9037, Norway.
| | - Sigurd Pedersen
- School of Sport Sciences, Faculty of Health Sciences, UiT the Arctic University of Norway, Postboks 6050 Langnes, Tromsø, 9037, Norway
| | - Nicoline B Giller
- School of Sport Sciences, Faculty of Health Sciences, UiT the Arctic University of Norway, Postboks 6050 Langnes, Tromsø, 9037, Norway
| | - Nora K Thomassen
- School of Sport Sciences, Faculty of Health Sciences, UiT the Arctic University of Norway, Postboks 6050 Langnes, Tromsø, 9037, Norway
| | - Kim Arne Heitmann
- School of Sport Sciences, Faculty of Health Sciences, UiT the Arctic University of Norway, Postboks 6050 Langnes, Tromsø, 9037, Norway
| | - Edvard H Sagelv
- School of Sport Sciences, Faculty of Health Sciences, UiT the Arctic University of Norway, Postboks 6050 Langnes, Tromsø, 9037, Norway
| | - John O Osborne
- School of Sport Sciences, Faculty of Health Sciences, UiT the Arctic University of Norway, Postboks 6050 Langnes, Tromsø, 9037, Norway
| | - Kristoffer R Johansen
- School of Sport Sciences, Faculty of Health Sciences, UiT the Arctic University of Norway, Postboks 6050 Langnes, Tromsø, 9037, Norway
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Petre IM, Nobari H, Boscoianu M, Pelin B, Ionescu A, Prieto González P, Oliveira R, Oancea B. Differences in knee flexor and extensor force and kinematic variables in rural versus urban area female students in Romania. Front Physiol 2024; 15:1152119. [PMID: 38764860 PMCID: PMC11099611 DOI: 10.3389/fphys.2024.1152119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 04/10/2024] [Indexed: 05/21/2024] Open
Abstract
The study aimed to identify and explain the typical differences in low-intensity high-volume resistance training (LIHV-RT) performances for major muscle groups between rural versus urban young female students to establish the relevant set of quantitative and qualitative resistance training parameters. The study sample included 46 recreational active female students at the Transilvania University of Brașov, (mean ± SD age, 20 ± 1 year; body mass, 60 ± 3 kg; height, 160 ± 4 cm) grouped urban vs. rural. The study used modified resistance exercise machines for the hamstring- and quadricep-group muscles, equipped with a dynamometer and sensors for identifying developed forces and accelerations. A number of 368 tests were performed, representing two attempts for each subject, for knee flexion and knee extension exercises, with two different loads. For the performance analysis some variables were considered: the maximum number of repetition until failure, maximum force developed, maximum acceleration, the duration of the set and the mean time per repetition. The maximum number of repetition to failure shows a significant higher value for rural than urban in case of knee flexion (d = 0.98 [0.32, 1.54] for load 1(L1) and d = 0.65 [0.03, 1.21] for load 2(L2)) and in case of knee extension (d = 1.89 [1.11, 2.48] for L1 and d = 1.67 [0.92, 2.25] for L2). The total duration of the sets shows a significant higher value for rural than urban in case of knee flexion (d = 0.84 [0.19, 1.39] for L2) and in case of knee extension (d = 1.46 [0.74, 2.03] for L1 and d = 1.56 [0.98, 2.14] for L2). Additionally we found differences in the quality of the relevant repetitions execution and in the impulse developed during the LIHV- MNRF sets. The study's main finding was that there are differences in LIHV-RT performances knee flexion and knee extension antagonistic exercises, between rural and urban female students. We concluded that the obtained results allow teachers to understand the optimal design of RT programs for the different groups of participants, in order to adapt their teaching techniques so that their final objectives are achieved, insisting on particular aspects of the theoretical or practical contents.
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Affiliation(s)
- Ioana Mădălina Petre
- Department of Industrial Engineering and Management, Transilvania University of Brasov, Brasov, Romania
| | - Hadi Nobari
- Department of Motric Performance, Transilvania University of Brasov, Brasov, Romania
- Faculty of Sport Sciences, University of Extremadura, Cáceres, Spain
| | - Mircea Boscoianu
- Department of Industrial Engineering and Management, Transilvania University of Brasov, Brasov, Romania
| | - Bogdan Pelin
- Department of Motric Performance, Transilvania University of Brasov, Brasov, Romania
| | - Anca Ionescu
- Department of Motric Performance, Transilvania University of Brasov, Brasov, Romania
| | - Pablo Prieto González
- Health and Physical Education Department, Prince Sultan University, Riyadh, Saudi Arabia
| | - Rafael Oliveira
- Sports Science School of Rio Maior–Polytechnic Institute of Santarém, Rio Maior, Portugal
- Research Center in Sport Sciences, Health Sciences and Human Development, Vila Real, Portugal
- Life Quality Research Centre, Rio Maior, Portugal
| | - Bogdan Oancea
- Department of Motric Performance, Transilvania University of Brasov, Brasov, Romania
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12
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Molinari T, Radaelli R, Rech A, Brusco CM, Markarian AM, Lopez P. Moderators of Resistance Training Effects in Healthy Young Women: A Systematic Review and Meta-analysis. J Strength Cond Res 2024; 38:804-814. [PMID: 38090747 DOI: 10.1519/jsc.0000000000004666] [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: 03/23/2024]
Abstract
ABSTRACT Molinari, T, Radaelli, R, Rech, A, Brusco, CM, Markarian, AM, and Lopez, P. Moderators of resistance training effects in healthy young women: A systematic review and meta-analysis. J Strength Cond Res 38(4): 804-814, 2024-To systematically review and analyze the effects of resistance-based exercise programs and potential moderators of change in body fat percentage, whole-body fat and lean mass, muscle hypertrophy, muscle strength, and muscle power/rapid force in healthy young women (between 18 and 35 years). A systematic search was undertaken in 7 databases from inception to May 2022. Eligible randomized controlled trials examined the effects of resistance-based exercise programs on outcomes of interest in healthy young women. Meta-analysis was undertaken with a 3-level mixed-effects model. Associations between standardized mean difference (SMD) and potential moderators (number of sessions, weekly volume, and intensity) were tested by meta-regression models. Statistical significance was set at an α level of 0.05, whereas an α level of 0.05-0.10 was also considered for potential moderators of resistance training effects. Forty articles ( n = 1,312) were included. Resistance-based exercise programs resulted in a significant improvement of 0.4 SMD (95% confidence intervals [95% CI]: 0.2 to 0.5, p < 0.001) in lean mass/muscle hypertrophy and 1.2 SMD (95% CI: 0.9 to 1.5, p < 0.001) in muscle strength. A higher number of sessions was associated with changes in lean mass/muscle hypertrophy ( β = 0.01 ± 0.00, p = 0.009), whereas a higher weekly volume approached statistical significance to moderate changes in muscle strength ( β = 0.01 ± 0.01, p = 0.053). Body fat percentage (-0.4 SMD, 95% CI: -0.6 to -0.1, p = 0.006) and muscle power/rapid force (0.6 SMD, 95% CI: 0.2 to 1.1, p = 0.011) were significantly improved. In conclusion, a higher resistance training volume was associated with greater improvements in lean mass/muscle hypertrophy, muscle strength, and body fat percentage, whereas muscle power/rapid force improvements were observed irrespective of prescription characteristics. These findings may help in designing resistance training programs for muscle hypertrophy, strength and power, and body fat percentage in healthy women.
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Affiliation(s)
- Talita Molinari
- Sport and Exercise Neuromechanics Group, Universidade Federal do Rio Grande, Rio Grande, Brazil
| | - Régis Radaelli
- Egas Moniz Center for Interdisciplinary Research (CiiEM), Egas Moniz School of Health & Science, Caparica, Almada, Portugal
| | - Anderson Rech
- Department of Physical Education, Universidade de Caxias do Sul, Caxias do Sul, Brazil
- Research Group on Exercise for Clinical Populations (GPCLIN), Universidade de Caxias do Sul, Caxias do Sul, Brazil
| | - Clarissa M Brusco
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Anna Maria Markarian
- Exercise Medicine Research Institute, Edith Cowan University, Joondalup, Australia
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, Australia
| | - Pedro Lopez
- Research Group on Exercise for Clinical Populations (GPCLIN), Universidade de Caxias do Sul, Caxias do Sul, Brazil
- Pleural Medicine Unit, Institute for Respiratory Health, Perth, Australia; and
- Medical School, Faculty of Health & Medical Sciences, University of Western Australia, Perth, Australia
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13
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Brandt T, Schwandner CTL, Schmidt A. Resistance exercise snacks improve muscle mass in female university employees: a prospective, controlled, intervention pilot-study. Front Public Health 2024; 12:1347825. [PMID: 38379679 PMCID: PMC10877054 DOI: 10.3389/fpubh.2024.1347825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 01/23/2024] [Indexed: 02/22/2024] Open
Abstract
Background Although resistance training (RT) is essential to preserve musculoskeletal fitness and maintain a healthy, independent life into old age, few women perform RT. We investigated whether resistance exercise snacking (RES) could be an efficient training approach for the workplace health promotion (WHP) to minimize barriers for participation and facilitate RT in women in order to improve musculoskeletal fitness. Methods This pilot-study followed a prospective, controlled intervention design. Female employees with sedentary occupations doing RT on less than 2 days/week before study participation were included. Participants self-selected for either intervention (IG) or control group (CG). While the IG [N = 15, mean age 42.1 (SD = 11.1) years] did 10 min of RES on working days for 12 weeks, the CG [N = 15, mean age 49.9 (SD = 9.7) years] was instructed to maintain their habitual physical activity. Primary endpoint was change in muscle mass. Secondary endpoint was change in maximum isometric strength. Balance, cardiovascular fitness, perceived health, and general life satisfaction was assessed for exploratory purpose. Measurements were taken before and after the intervention. Results 12 participants of IG and 14 of CG completed the study. Muscle mass improved significantly more in the IG [+0.42 (SD = 0.54) kg] compared to the CG [-0.16 (SD = 0.51) kg] (p = 0.01, ƞ2p = 0.24). Strength did not change significantly between groups. Nevertheless, there was a trend for greater improvements in the IG compared to the CG for trunk extension, trunk flexion, and upper body push but not upper body pull. Regarding exploratory endpoints, no significant between-group changes were found. Despite their poor fitness, both groups perceived their health as good and had high life satisfaction before and after the intervention. Conclusion RES could be an effective approach for the WHP to promote RT in inactive women with sedentary occupations and improve their muscle mass.
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Hackett DA, Li J, Wang B, Way KL, Cross T, Tran DL. Acute Effects of Resistance Exercise on Intraocular Pressure in Healthy Adults: A Systematic Review. J Strength Cond Res 2024; 38:394-404. [PMID: 38090981 DOI: 10.1519/jsc.0000000000004668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
ABSTRACT Hackett, DA, Li, J, Wang, B, Way, KL, Cross, T, and Tran, DL. Acute effects of resistance exercise on intraocular pressure in healthy adults: A systematic review. J Strength Cond Res 38(2): 394-404, 2024-Intraocular pressure (IOP) tends to fluctuate during a resistance exercise (RE). This systematic review examines the acute effects of RE on IOP in healthy adults and factors that influence changes in IOP. Five electronic databases were searched using terms related to RE and IOP. A strict inclusion criterion was applied, which included being 55 years or younger with no medical conditions and RE intensity needing to be quantifiable (e.g., based on a maximal effort). Thirty-four studies met the inclusion criteria for this review. Isometric and isotonic contractions produced similar changes in IOP during RE up to 28.7 mm Hg. Exercises that involved larger muscle mass, such as squats and leg press, were found to produce changes in IOP during exercise ranging from 3.1 to 28.7 mm Hg. Smaller changes in IOP during RE were found for exercises engaging less muscle mass (e.g., handgrip and bicep curls). Intraocular pressure was found to increase during RE when lifting heavier loads and with longer exercise durations (e.g., greater repetitions). The Valsalva maneuver (VM) and breath-hold during RE accentuated the change in IOP, with more extreme changes observed with the VM. However, most studies showed that postexercise IOP returned to baseline after approximately 1 minute of recovery. An acute increase in IOP is observed during RE in healthy adults with fluctuations of varying magnitude. Factors that independently increase IOP during RE include exercises involving larger muscle mass, heavy loads, greater set duration, and when the VM or breath-hold is performed.
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Affiliation(s)
- Daniel A Hackett
- Discipline of Exercise and Sports Science, Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown, Australia
| | - Jiuzhang Li
- Discipline of Exercise and Sports Science, Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown, Australia
| | - Boliang Wang
- Discipline of Exercise and Sports Science, Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown, Australia
| | - Kimberley L Way
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Sciences, Deakin University, Geelong, Australia
- Division of Cardiac Prevention and Rehabilitation, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Troy Cross
- Discipline of Exercise and Sports Science, Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown, Australia
| | - Derek L Tran
- Discipline of Exercise and Sports Science, Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown, Australia
- The University of Sydney School of Medicine, Central Clinical School, Camperdown, Australia; and
- Department of Cardiology, Royal Prince Alfred Hospital, Camperdown, Australia
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15
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Mcleod JC, Currier BS, Lowisz CV, Phillips SM. The influence of resistance exercise training prescription variables on skeletal muscle mass, strength, and physical function in healthy adults: An umbrella review. JOURNAL OF SPORT AND HEALTH SCIENCE 2024; 13:47-60. [PMID: 37385345 PMCID: PMC10818109 DOI: 10.1016/j.jshs.2023.06.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 04/18/2023] [Accepted: 05/15/2023] [Indexed: 07/01/2023]
Abstract
PURPOSE The aim of this umbrella review was to determine the impact of resistance training (RT) and individual RT prescription variables on muscle mass, strength, and physical function in healthy adults. METHODS Following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, we systematically searched and screened eligible systematic reviews reporting the effects of differing RT prescription variables on muscle mass (or its proxies), strength, and/or physical function in healthy adults aged >18 years. RESULTS We identified 44 systematic reviews that met our inclusion criteria. The methodological quality of these reviews was assessed using A Measurement Tool to Assess Systematic Reviews; standardized effectiveness statements were generated. We found that RT was consistently a potent stimulus for increasing skeletal muscle mass (4/4 reviews provide some or sufficient evidence), strength (4/6 reviews provided some or sufficient evidence), and physical function (1/1 review provided some evidence). RT load (6/8 reviews provided some or sufficient evidence), weekly frequency (2/4 reviews provided some or sufficient evidence), volume (3/7 reviews provided some or sufficient evidence), and exercise order (1/1 review provided some evidence) impacted RT-induced increases in muscular strength. We discovered that 2/3 reviews provided some or sufficient evidence that RT volume and contraction velocity influenced skeletal muscle mass, while 4/7 reviews provided insufficient evidence in favor of RT load impacting skeletal muscle mass. There was insufficient evidence to conclude that time of day, periodization, inter-set rest, set configuration, set end point, contraction velocity/time under tension, or exercise order (only pertaining to hypertrophy) influenced skeletal muscle adaptations. A paucity of data limited insights into the impact of RT prescription variables on physical function. CONCLUSION Overall, RT increased muscle mass, strength, and physical function compared to no exercise. RT intensity (load) and weekly frequency impacted RT-induced increases in muscular strength but not muscle hypertrophy. RT volume (number of sets) influenced muscular strength and hypertrophy.
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Affiliation(s)
- Jonathan C Mcleod
- Department of Kinesiology, Faculty of Science, McMaster University, Hamilton L8S4L8, Canada
| | - Brad S Currier
- Department of Kinesiology, Faculty of Science, McMaster University, Hamilton L8S4L8, Canada
| | - Caroline V Lowisz
- Department of Kinesiology, Faculty of Science, McMaster University, Hamilton L8S4L8, Canada
| | - Stuart M Phillips
- Department of Kinesiology, Faculty of Science, McMaster University, Hamilton L8S4L8, Canada.
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Nolan D, McNulty KL, Manninen M, Egan B. The Effect of Hormonal Contraceptive Use on Skeletal Muscle Hypertrophy, Power and Strength Adaptations to Resistance Exercise Training: A Systematic Review and Multilevel Meta-analysis. Sports Med 2024; 54:105-125. [PMID: 37755666 PMCID: PMC10798924 DOI: 10.1007/s40279-023-01911-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/10/2023] [Indexed: 09/28/2023]
Abstract
BACKGROUND Resistance exercise training is widely used by general and athletic populations to increase skeletal muscle hypertrophy, power and strength. Endogenous sex hormones influence various bodily functions, including possibly exercise performance, and may influence adaptive changes in response to exercise training. Hormonal contraceptive (HC) use modulates the profile of endogenous sex hormones, and therefore, there is increasing interest in the impact, if any, of HC use on adaptive responses to resistance exercise training. OBJECTIVE Our aim is to provide a quantitative synthesis of the effect of HC use on skeletal muscle hypertrophy, power and strength adaptations in response to resistance exercise training. METHODS A systematic review with meta-analysis was conducted on experimental studies which directly compared skeletal muscle hypertrophy, power and strength adaptations following resistance exercise training in hormonal contraceptive users and non-users conducted before July 2023. The search using the online databases PUBMED, SPORTDiscus, Web of Science, Embase and other supplementary search strategies yielded 4669 articles, with 8 articles (54 effects and 325 participants) meeting the inclusion criteria. The methodological quality of the included studies was assessed using the "Tool for the assessment of study quality and reporting in exercise". RESULTS All included studies investigated the influence of oral contraceptive pills (OCP), with no study including participants using other forms of HC. The articles were analysed using a meta-analytic multilevel maximum likelihood estimator model. The results indicate that OCP use does not have a significant effect on hypertrophy [0.01, 95% confidence interval (CI) [- 0.11, 0.13], t = 0.14, p = 0.90), power (- 0.04, 95% CI [- 0.93, 0.84], t = - 0.29, p = 0.80) or strength (0.10, 95% CI [- 0.08, 0.28], t = 1.48, p = 0.20). DISCUSSION Based on the present analysis, there is no evidence-based rationale to advocate for or against the use of OCPs in females partaking in resistance exercise training to increase hypertrophy, power and/or strength. Rather, an individualised approach considering an individual's response to OCPs, their reasons for use and menstrual cycle history may be more appropriate. REGISTRATION The review protocol was registered on PROSPERO (ID number and hyperlink: CRD42022365677).
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Affiliation(s)
- David Nolan
- School of Health and Human Performance, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Kelly L McNulty
- Sport, Health & Exercise (SHE) Research Group, Department of Sport and Health Sciences, Technological University of the Shannon, Athlone, Co. Westmeath, Ireland
- UPMC Sports Medicine and UPMC Institute for Health, UPMC, Pittsburgh, Ireland
| | - Mika Manninen
- School of Health and Human Performance, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Brendan Egan
- School of Health and Human Performance, Dublin City University, Glasnevin, Dublin 9, Ireland.
- Florida Institute of Human and Machine Cognition, Pensacola, FL, USA.
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17
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Cirone D, Berbrier DE, Gibbs JC, Usselman CW. Health-related physical fitness in women with polycystic ovary syndrome versus controls: a systematic review and meta-analysis. Arch Gynecol Obstet 2024; 309:17-36. [PMID: 36920532 DOI: 10.1007/s00404-023-07004-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 03/06/2023] [Indexed: 03/16/2023]
Abstract
INTRODUCTION Polycystic ovary syndrome (PCOS) is a common endocrinopathy associated with cardiometabolic dysfunction. PURPOSE (1) To compare HRPF indices, including cardiorespiratory fitness (CRF), muscle strength, and muscle endurance, between women with and without PCOS (i.e., controls). (2) To explore the impact of moderating factors, i.e., insulin sensitivity, androgen levels, physical activity levels, and body mass index, on these indices. METHODS Articles comparing HRPF between PCOS and control groups were identified until February 27th, 2022. Random-effects meta-analyses were conducted and moderating factors were explored with subgroup and meta-regression analyses. RESULTS Twenty studies were included. Compared to controls, CRF was lower in women with PCOS (n = 15, - 0.70 [- 1.35, - 0.05], P = 0.03, I2 = 95%). Meta-regression analyses demonstrated that fasting insulin (P = 0.004) and homeostatic model assessment of insulin resistance (P = 0.006) were negatively associated with CRF, while sex-hormone binding globulin levels (P = 0.003) were positively associated. Absolute muscle strength was not different between PCOS and controls (n = 7, 0.17 [- 0.10, 0.45], P = 0.22, I2 = 37%). One study evaluated muscle endurance and reported lower core endurance in PCOS subjects compared to controls. CONCLUSION These data suggest that PCOS may be associated with impaired CRF. It remains unclear whether muscle strength and endurance differ between women with PCOS and controls. As this data set was limited by a small sample size, potential for bias, and inconsistent findings, additional studies accounting for the heterogeneous presentation of PCOS as well as improved matching between PCOS and controls for characteristics known to affect HRPF would help elucidate the impact of PCOS on indices of HRPF. PROSPERO REGISTRATION NUMBER CRD42020196380.
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Affiliation(s)
- Domenica Cirone
- Cardiovascular Health and Autonomic Regulation Laboratory, Department of Kinesiology and Physical Education, McGill University, Montreal, Canada
| | - Danielle E Berbrier
- Cardiovascular Health and Autonomic Regulation Laboratory, Department of Kinesiology and Physical Education, McGill University, Montreal, Canada
| | - Jenna C Gibbs
- Department of Kinesiology and Physical Education, McGill University, Montreal, QC, Canada
| | - Charlotte W Usselman
- Cardiovascular Health and Autonomic Regulation Laboratory, Department of Kinesiology and Physical Education, McGill University, Montreal, Canada.
- McGill Research Centre for Physical Activity and Health, McGill University, Montreal, Canada.
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Hunter SK, S Angadi S, Bhargava A, Harper J, Hirschberg AL, D Levine B, L Moreau K, J Nokoff N, Stachenfeld NS, Bermon S. The Biological Basis of Sex Differences in Athletic Performance: Consensus Statement for the American College of Sports Medicine. Med Sci Sports Exerc 2023; 55:2328-2360. [PMID: 37772882 DOI: 10.1249/mss.0000000000003300] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/30/2023]
Abstract
ABSTRACT Biological sex is a primary determinant of athletic performance because of fundamental sex differences in anatomy and physiology dictated by sex chromosomes and sex hormones. Adult men are typically stronger, more powerful, and faster than women of similar age and training status. Thus, for athletic events and sports relying on endurance, muscle strength, speed, and power, males typically outperform females by 10%-30% depending on the requirements of the event. These sex differences in performance emerge with the onset of puberty and coincide with the increase in endogenous sex steroid hormones, in particular testosterone in males, which increases 30-fold by adulthood, but remains low in females. The primary goal of this consensus statement is to provide the latest scientific knowledge and mechanisms for the sex differences in athletic performance. This review highlights the differences in anatomy and physiology between males and females that are primary determinants of the sex differences in athletic performance and in response to exercise training, and the role of sex steroid hormones (particularly testosterone and estradiol). We also identify historical and nonphysiological factors that influence the sex differences in performance. Finally, we identify gaps in the knowledge of sex differences in athletic performance and the underlying mechanisms, providing substantial opportunities for high-impact studies. A major step toward closing the knowledge gap is to include more and equitable numbers of women to that of men in mechanistic studies that determine any of the sex differences in response to an acute bout of exercise, exercise training, and athletic performance.
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Affiliation(s)
- Sandra K Hunter
- Exercise Science Program, Department of Physical Therapy, and Athletic and Human Performance Center, Marquette University, Milwaukee, WI
| | | | - Aditi Bhargava
- Department of Obstetrics and Gynecology, Center for Reproductive Sciences, University of California, San Francisco, CA
| | - Joanna Harper
- Loughborough University, Loughborough, UNITED KINGDOM
| | - Angelica Lindén Hirschberg
- Department of Women's and Children's Health, Karolinska Institutet, and Department of Gynecology and Reproductive Medicine, Karolinska University Hospital, Stockholm, SWEDEN
| | - Benjamin D Levine
- Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas, and the Department of Internal Medicine, Division of Cardiology, University of Texas Southwestern Medical Center, Dallas, TX
| | - Kerrie L Moreau
- Department of Medicine, Division of Geriatric Medicine, University of Colorado Anschutz Medical Campus, and Eastern Colorado Health Care System, Geriatric Research Education and Clinical Center, Aurora, CO
| | - Natalie J Nokoff
- Department of Pediatrics, Section of Endocrinology, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Nina S Stachenfeld
- The John B. Pierce Laboratory and Department of Obstetrics, Gynecology and Reproductive Sciences, Yale School of Medicine, New Haven, CT
| | - Stéphane Bermon
- Health and Science Department, World Athletics, Monaco and the LAMHESS, University Côte d'Azur, Nice, FRANCE
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Pandit A, Tran TB, Letton M, Cowley E, Gibbs M, Wewege MA, Hagstrom AD. Data Informing Governing Body Resistance-Training Guidelines Exhibit Sex Bias: An Audit-Based Review. Sports Med 2023; 53:1681-1691. [PMID: 37382828 PMCID: PMC10432356 DOI: 10.1007/s40279-023-01878-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/12/2023] [Indexed: 06/30/2023]
Abstract
The objective of this review was to examine the ratio of female and male participants utilised in data informing consensus statements and position stands in the field of resistance training (RT). In order to achieve this objective, we conducted an 'audit' style review. We accessed three databases: SPORTDiscus, MEDLINE and Google Scholar utilising the following search terms: resistance or strength training AND consensus statements or position statements/stands. Eligibility criteria included consensus statements and position stands for RT in youth, adults and older adults. In this paper we have used the term 'female' to describe biological sex. Gender is a social construct and often describes roles and behaviours that society assigns to men or women. In this paper we have used the term 'women' to describe gender. Reference lists from each guideline were screened with the number of male and female participants extracted from each study. We also extracted data on the gender of the authors of the statements. We located 11 guidelines encompassing a total of 104,251,363 participants. Youth guidelines were comprised of 69% male participants. There were 287 studies that included both sexes, 205 male-only and 92 female-only studies. Adult guidelines were comprised of 70% male participants. There were 104 studies that included both sexes, 240 male-only and 44 female-only studies. Older adult guidelines were comprised of 54% female participants. There were 395 studies that included both sexes, 112 male-only and 83 female-only studies. Women authors comprised 13% of all authors of position stands and consensus statements. These results demonstrate an under-representation of females and women as both participants and as authors. It is imperative to ensure that data informing governing body guidelines and consensus statements are representative of the population they aim to inform. If this is not possible, guidelines should clearly state when their data and recommendations are based primarily upon one sex.
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Affiliation(s)
- Anurag Pandit
- Faculty of Medicine and Health, School of Health Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Thai Binh Tran
- Faculty of Medicine and Health, School of Health Sciences, University of New South Wales, Sydney, NSW, Australia
- Faculty of Medicine and Health, School of Medical, Indigenous and Health Sciences, University of Wollongong, Wollongong, NSW, Australia
| | - Meg Letton
- Faculty of Medicine and Health, School of Health Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Emma Cowley
- Department of Exercise and Sport Science, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Mitchell Gibbs
- Faculty of Medicine and Health, School of Health Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Michael A Wewege
- Faculty of Medicine and Health, School of Health Sciences, University of New South Wales, Sydney, NSW, Australia
- Centre for Pain IMPACT, Neuroscience Research Australia, Sydney, NSW, Australia
| | - Amanda D Hagstrom
- Faculty of Medicine and Health, School of Health Sciences, University of New South Wales, Sydney, NSW, Australia.
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Zouita A, Darragi M, Bousselmi M, Sghaeir Z, Clark CCT, Hackney AC, Granacher U, Zouhal H. The Effects of Resistance Training on Muscular Fitness, Muscle Morphology, and Body Composition in Elite Female Athletes: A Systematic Review. Sports Med 2023; 53:1709-1735. [PMID: 37289331 PMCID: PMC10432341 DOI: 10.1007/s40279-023-01859-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/27/2023] [Indexed: 06/09/2023]
Abstract
BACKGROUND Well programmed strength and conditioning training is an indispensable part of the long-term training process for athletes in individual and team sports to improve performance and prevent injuries. Yet, there is a limited number of studies available that examine the effects of resistance training (RT) on muscular fitness and physiological adaptations in elite female athletes. OBJECTIVES This systematic review aimed to summarize recent evidence on the long-term effects of RT or combinations of RT with other strength-dominated exercise types on muscular fitness, muscle morphology, and body composition in female elite athletes. MATERIALS AND METHODS A systematic literature search was conducted in nine electronic databases (Academic Search Elite, CINAHL, ERIC, Open Access Theses and Dissertations, Open Dissertations, PsycINFO, PubMed/MEDLINE, Scopus, and SPORTDiscus) from inception until March 2022. Key search terms from the MeSH database such as RT and strength training were included and combined using the operators "AND," "OR," and "NOT". The search syntax initially identified 181 records. After screening for titles, abstracts, and full texts, 33 studies remained that examined the long-term effects of RT or combinations of RT with other strength-dominated exercise types on muscular fitness, muscle morphology, and body composition in female elite athletes. RESULTS Twenty-four studies used single-mode RT or plyometric training and nine studies investigated the effects of combined training programs such as resistance with plyometric or agility training, resistance and speed training, and resistance and power training. The training duration lasted at least 4 weeks, but most studies used ~ 12 weeks. Studies were generally classified as 'high-quality' with a mean PEDro score of 6.8 (median 7). Irrespective of the type or combination of RT with other strength-dominated exercise regimens (type of exercise, exercise duration, or intensity), 24 out of 33 studies reported increases in muscle power (e.g., maximal and mean power; effect size [ES]: 0.23 < Cohen's d < 1.83, small to large), strength (e.g., one-repetition-maximum [1RM]; ES: 0.15 < d < 6.80, small to very large), speed (e.g., sprint times; ES: 0.01 < d < 1.26, small to large), and jump performance (e.g., countermovement/squat jump; ES: 0.02 < d < 1.04, small to large). The nine studies that examined the effects of combined training showed significant increases on maximal strength (ES: 0.08 < d < 2.41, small to very large), muscle power (ES: 0.08 < d < 2.41, small to very large), jump and sprint performance (ES: 0.08 < d < 2.41, small to very large). Four out of six studies observed no changes in body mass or percentage of body fat after resistance or plyometric training or combined training (ES: 0.026 < d < 0.492, small to medium). Five out of six studies observed significant changes in muscle morphology (e.g., muscle thickness, muscle fiber cross-sectional area; ES: 0.23 < d < 3.21, small to very large). However, one study did not find any changes in muscle morphology (i.e., muscle thickness, pennation angle; ES: 0.1 < d < 0.19, small). CONCLUSION Findings from this systematic review suggest that RT or combined RT with other strength-dominated exercise types leads to significant increases in measures of muscle power, strength, speed, and jump performance in elite female athletes. However, the optimal dosage of programming parameters such as training intensity and duration necessary to induce large effects in measures of muscular fitness and their physiological adaptations remain to be resolved in female elite athletes.
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Affiliation(s)
- Amira Zouita
- Higher Institute of Sport and Physical Education of Ksar-Said, Research Unit "Sports Performance, Health & Society" (UR17JS01), University of Manouba, Manouba, Tunisia
| | - Manel Darragi
- Higher Institute of Sport and Physical Education of Ksar-Said, Research Unit "Sports Performance, Health & Society" (UR17JS01), University of Manouba, Manouba, Tunisia
| | - Mariem Bousselmi
- Higher Institute of Sport and Physical Education of Ksar-Said, Research Unit "Sports Performance, Health & Society" (UR17JS01), University of Manouba, Manouba, Tunisia
| | - Zouita Sghaeir
- Higher Institute of Sport and Physical Education of Ksar-Said, University of Manouba, Manouba, Tunisia
| | - Cain C T Clark
- Centre for Intelligent Healthcare, Coventry University, Coventry, UK
| | - Anthony C Hackney
- Department of Exercise & Sport Science, University of North Carolina, Chapel Hill, NC, USA
| | - Urs Granacher
- Department of Sport and Sport Science, Exercise and Human Movement Science, University of Freiburg, Freiburg, Germany.
| | - Hassane Zouhal
- Univ Rennes, M2S (Laboratoire Mouvement, Sport, Santé), EA 1274, 35000, Rennes, France.
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Jung R, Gehlert S, Geisler S, Isenmann E, Eyre J, Zinner C. Muscle strength gains per week are higher in the lower-body than the upper-body in resistance training experienced healthy young women-A systematic review with meta-analysis. PLoS One 2023; 18:e0284216. [PMID: 37053143 PMCID: PMC10101404 DOI: 10.1371/journal.pone.0284216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Accepted: 03/27/2023] [Indexed: 04/14/2023] Open
Abstract
BACKGROUND Women are underrepresented in resistance exercise-related studies. To date only one meta-analysis provides concrete training recommendations for muscle strength gains through resistance training in eumenorrhoeic women. OBJECTIVE This review aims to identify research gaps to advance future study in this area to expand the knowledge concerning resistance exercise-induced strength gains in women and to provide guidelines on the number of repetitions per set and the training frequency per week to enhance maximal muscle strength. METHODS The electronic databases PubMed and Web of Science were searched using a comprehensive list of relevant terms. After checking for exclusion criteria, 31 studies could be included in the final analysis using data from 621 subjects. From these data sets, the ideal number of repetitions per set and also the training frequency per week were analyzed. RESULTS In the lower body, the largest gains were achieved with 1 to 6 repetitions (17.4% 1RM increase). For lower-body exercises, the highest gains were achieved with 13 to 20 repetitions (8.7% 1RM increase). The lower body should be trained two times a week (8.5% 1RM increase). The upper body should be trained two (5.2% 1RM increase) to three times (4.5% 1RM increase) a week. CONCLUSION Women can increase their 1RM by 7.2% per week in the upper body and by 5.2% per week in the lower-body exercises. The upper body can be trained more than two times per week whereas the lower body should be trained two times. Women with intermediate experiences in RT and advanced performance level show more rapid increases in strength in the lower-body compared to the upper-body while no differences were found between upper and lower limb adaptations in RT-beginner subjects.
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Affiliation(s)
- Roger Jung
- Department of Biosciences of Sport Science, Institute of Sport Science, University of Hildesheim, Hildesheim, Germany
| | - Sebastian Gehlert
- Department of Biosciences of Sport Science, Institute of Sport Science, University of Hildesheim, Hildesheim, Germany
| | - Stephan Geisler
- Fitness and Health, IST University of Applied Sciences, Duesseldorf, Germany
| | - Eduard Isenmann
- Fitness and Health, IST University of Applied Sciences, Duesseldorf, Germany
- Department for Molecular and Cellular Sports Medicine, Institute for Cardiovascular Research and Sports Medicine, German Sport University Cologne, Cologne, Germany
| | - Julia Eyre
- Fitness and Health, IST University of Applied Sciences, Duesseldorf, Germany
| | - Christoph Zinner
- Department of Sport, University of Applied Sciences for Police and Administration of Hesse, Wiesbaden, Germany
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22
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Roth C, Schwiete C, Happ K, Rettenmaier L, Schoenfeld BJ, Behringer M. Resistance training volume does not influence lean mass preservation during energy restriction in trained males. Scand J Med Sci Sports 2023; 33:20-35. [PMID: 36114738 DOI: 10.1111/sms.14237] [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: 05/17/2022] [Revised: 08/04/2022] [Accepted: 09/12/2022] [Indexed: 12/24/2022]
Abstract
This study investigated the effects of a relatively high- versus moderate-volume resistance training program on changes in lean mass during caloric restriction. Thirty-eight resistance-trained males were randomized to perform either a high-volume (HVG; 5 sets/exercise) or a moderate-volume (MVG; 3 sets/exercise) resistance training program. Both groups were supervised during lower body training. Participants consumed 30 kcal/kg for 6 weeks after 1 week of weight maintenance (45 kcal/kg), with protein intake fixed at 2.8 g/kg fat-free mass. Muscle thickness of the m. rectus femoris, body composition, contractile properties, stiffness, mood, and sleep status were assessed at pre-, mid-, and post-study. No significant group × time interaction was observed for muscle thickness of the m. rectus femoris at 50% (∆ [post-pre] 0.36 ± 0.93 mm vs. ∆ -0.01 ± 1.59 mm; p = 0.226) and 75% length (∆ -0.32 ± 1.12 mm vs. ∆ 0.08 ± 1.14 mm; p = 0.151), contractility, sleep, and mood in the HVG and MVG, respectively. Body mass (HVG: ∆ -1.69 ± 1.12 kg vs. MVG: ∆ -1.76 ± 1.76 kg) and lean mass (∆ -0.51 ± 2.30 kg vs. ∆ -0.92 ± 1.59 kg) decreased significantly in both groups (p = 0.022), with no between-group difference detected (p = 0.966). High-volume resistance training appears to have neither an advantage nor disadvantage over moderate-volume resistance training in terms of maintaining lean mass or muscle thickness. Given that both groups increased volume load and maintained muscle contractility, sleep quality, and mood, either moderate or higher training volumes conceivably can be employed by resistance-trained individuals to preserve muscle during periods of moderate caloric restriction.
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Affiliation(s)
- Christian Roth
- Department of Sports Medicine and Exercise Physiology, Institute of Sport Sciences, Goethe University Frankfurt, Frankfurt, Germany
| | - Carsten Schwiete
- Department of Sports Medicine and Exercise Physiology, Institute of Sport Sciences, Goethe University Frankfurt, Frankfurt, Germany
| | - Kevin Happ
- Department of Sports Medicine and Exercise Physiology, Institute of Sport Sciences, Goethe University Frankfurt, Frankfurt, Germany
| | - Lukas Rettenmaier
- Department of Sports Medicine and Exercise Physiology, Institute of Sport Sciences, Goethe University Frankfurt, Frankfurt, Germany
| | - Brad J Schoenfeld
- Department of Health Sciences, CUNY Lehman College, Bronx, New York, USA
| | - Michael Behringer
- Department of Sports Medicine and Exercise Physiology, Institute of Sport Sciences, Goethe University Frankfurt, Frankfurt, Germany
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Ding W, Li J, Zhu C. CORE TRAINING IMPACTS RUNNING ATHLETES’ PHYSICAL CAPACITY. REV BRAS MED ESPORTE 2023. [DOI: 10.1590/1517-8692202329012022_0295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
ABSTRACT Introduction: Core strength training focuses mainly on the muscle group and neuromuscular system of the central area of the human body to gain strength and stability for complex movements. Studies have reported the effect of core training on high-capacity athletes, but there is still a gap regarding the impacts on physical capacity in running athletes. Objective: To study the effects of strength training on athletes’ core and the direct impacts on running quality. Methods: Athletes of the men’s running team at the athletic training center of the Institute of Physical Education were core strength trained for 10 to 12 weeks. After the period, physical tests, according to predetermined protocols. The data were compared before, after the intervention, and after statistical treatment, and the findings were discussed according to the scientific literature. Results: After 12 weeks of training, among the five sports skills, there was only a significant difference before and after training of body lateral flexion (right side) (P<0.05), and there was no significant difference before and after training of the other four sport skills (P > 0.05). Conclusions: Through the static and dynamic exercises of core strength training, we can effectively improve the proprioception intervention in body movement so that runners can more accurately control their joints and muscles, ensuring movement and postural accuracy. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.
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Affiliation(s)
- Wei Ding
- Liaoning Normal University, China
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24
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Cai L, Wang X. AQUATIC RESISTANCE TRAINING REPERCUSSIONS ON THE DYNAMIC STABILITY IN VOLLEYBALL ATHLETES. REV BRAS MED ESPORTE 2022. [DOI: 10.1590/1517-8692202228062022_0077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT Introduction Resistance training is considered a practical pathway for increasing strength and speed. Objective Explore the aquatic resistance training on the dynamic stability in volleyball athletes. Methods Using aquatic resistance training reinforcement, 20 first-level national male volleyball athletes were randomly divided into control and experimental groups. The time of the experiment was ten weeks. In the end, lower limb muscle strength, jumping ability, dynamic stability, and muscle pain were compared. Residual effects were also checked six weeks after the end of the experiment. Results The aquatic resistance training group stopped training for six weeks, peak torque at 60°/s, 180°s of relative knee extension, jump height, full arm swing, and all three phases of the high jump were significantly better than the preliminary test; water entry speed in the vertical direction was also significantly better one week after training. Conclusion Aquatic resistance training can significantly improve the dynamic stability of the lower limbs, and its effect can be maintained up to 6 weeks after completion. It is recommended to apply resistance enhancement training to maintain fitness, especially for long periods. Evidence Level II; Therapeutic Studies - Investigating the result.
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Hou J, Li T. EFFECT OF AIR ENDURANCE TRAINING ON ATHLETE’S LOWER LIMB EXPLOSIVE STRENGTH. REV BRAS MED ESPORTE 2022. [DOI: 10.1590/1517-8692202228052022_0068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT Introduction: The explosion force is the neuromuscular system's capacity to overcome resistance with the highest possible contraction speed. It is the result of a kinetic combination between power and speed. The effect of outdoor resistance training is used in several athletics areas to improve the explosive power of the lower limbs. However, there are still few studies focused on basketball athletes. Objective: Verify the effect of outdoor resistance training on the explosive power of the lower limbs of basketball players. Methods: The article uses mathematical statistics and randomized controlled trials by analytical comparison to explore the influence of compound training methods on basketball players’ lower explosive limb power. Results: There was no performance gain in the control group at 30 days. Was an improved ability in the experimental group jumping after high-intensity composite training. Conclusion: Compound training plays a crucial role in improving lower limb explosive power in college basketball players. Evidence Level II; Therapeutic Studies - Investigating the result.
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Affiliation(s)
| | - Tielu Li
- Beijing Sports University, China
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26
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Hackett D, Ghayomzadeh M, Farrell S, Davies T, Sabag A. Influence of total repetitions per set on local muscular endurance: A systematic review with meta-analysis and meta-regression. Sci Sports 2022. [DOI: 10.1016/j.scispo.2021.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Sung JH, Son SR, Baek SH, Kim BJ. The association of aerobic, resistance, and combined exercises with the handgrip strength of middle-aged and elderly Korean adults: a nationwide cross-sectional study. BMC Geriatr 2022; 22:676. [PMID: 35974299 PMCID: PMC9380318 DOI: 10.1186/s12877-022-03293-z] [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: 04/21/2022] [Accepted: 07/05/2022] [Indexed: 11/10/2022] Open
Abstract
Background Handgrip strength (HGS), an indicator of overall muscle strength, is a key component in sarcopenia diagnosis. Although exercise is an effective strategy to prevent sarcopenia, the most appropriate exercise type targeting sarcopenia needs to be established. This study aimed to investigate the relationship between the physical activity (PA) patterns and HGS. Methods This was a cross-sectional study using the data from the 7th Korea National Health and Nutrition Examination Survey (2016–2018). The study population included 12,814 adults aged ≥ 40 years. According to the World Health Organization PA guidelines for public health, both aerobic (moderate to vigorous PA ≥ 150 min/week) and resistance exercises (≥ 2 sessions/week) are recommended. Study participants were categorized into one of the four groups depending on their adherence to each of two exercise guidelines (“neither,” “aerobic only,” “resistance only,” and “combined”). By defining normal HGS cutoff values as the lowest quartile of HGS from the population aged 20 years and above, we classified participants as “preserved” HGS group if their HGS was equal to or above the cutoff values. A Poisson regression model was used to calculate adjusted prevalence ratios (APRs) for preserved HGS across the four PA guideline adherences stratified by age and sex groups. Results In middle-aged adults, the “combined” exercise group was independently associated with the preserved HGS (male, age 50–59 years, APR = 1.072; male, age 60–69 years, APR = 1.180; female, age 50–59 years, APR = 1.112; female, age 60–69 years, APR = 1.188). For adults aged ≥ 70 years, meeting only aerobic or resistance exercise guidelines showed a positive association with HGS before adjusting for other health-related variables. In males of ≥ 70 years, the APR of preserved HGS was highest in the “combined” exercise group (“resistance only,” APR = 1.459, “combined,” APR = 1.664), while in women aged ≥ 70 years, the significance was lost after adjusting for covariates. Conclusions Adults meeting both aerobic and resistance exercise guidelines were associated with the highest prevalence of preserved HGS. Performing both types of exercise might be the most effective way to prevent sarcopenia that should be investigated in future clinical trials. Supplementary Information The online version contains supplementary material available at 10.1186/s12877-022-03293-z.
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Affiliation(s)
- Joo Hye Sung
- Department of Neurology, Korea University Anam Hospital, Korea University College of Medicine, 73, Goryeodae-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Se Rhim Son
- Department of Biostatistics, Korea University College of Medicine, Seoul, Republic of Korea
| | - Seol-Hee Baek
- Department of Neurology, Korea University Anam Hospital, Korea University College of Medicine, 73, Goryeodae-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Byung-Jo Kim
- Department of Neurology, Korea University Anam Hospital, Korea University College of Medicine, 73, Goryeodae-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea. .,BK21FOUR R&E Center for Learning Health Systems, Korea University, Seoul, Republic of Korea.
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O'Bryan SM, Connor KR, Drummer DJ, Lavin KM, Bamman MM. Considerations for Sex-Cognizant Research in Exercise Biology and Medicine. Front Sports Act Living 2022; 4:903992. [PMID: 35721874 PMCID: PMC9204149 DOI: 10.3389/fspor.2022.903992] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 05/17/2022] [Indexed: 12/15/2022] Open
Abstract
As the fields of kinesiology, exercise science, and human movement developed, the majority of the research focused on male physiology and extrapolated findings to females. In the medical sphere, basing practice on data developed in only males resulted in the removal of drugs from the market in the late 1990s due to severe side effects (some life-threatening) in females that were not observed in males. In response to substantial evidence demonstrating exercise-induced health benefits, exercise is often promoted as a key modality in disease prevention, management, and rehabilitation. However, much like the early days of drug development, a historical literature knowledge base of predominantly male studies may leave the exercise field vulnerable to overlooking potentially key biological differences in males and females that may be important to consider in prescribing exercise (e.g., how exercise responses may differ between sexes and whether there are optimal approaches to consider for females that differ from conventional approaches that are based on male physiology). Thus, this review will discuss anatomical, physiological, and skeletal muscle molecular differences that may contribute to sex differences in exercise responses, as well as clinical considerations based on this knowledge in athletic and general populations over the continuum of age. Finally, this review summarizes the current gaps in knowledge, highlights the areas ripe for future research, and considerations for sex-cognizant research in exercise fields.
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Affiliation(s)
- Samia M. O'Bryan
- Department of Cell, Developmental and Integrative Biology, The University of Alabama at Birmingham, Birmingham, AL, United States
- UAB Center for Exercise Medicine, The University of Alabama at Birmingham, Birmingham, AL, United States
| | - Kathleen R. Connor
- UAB Center for Exercise Medicine, The University of Alabama at Birmingham, Birmingham, AL, United States
| | - Devin J. Drummer
- Department of Cell, Developmental and Integrative Biology, The University of Alabama at Birmingham, Birmingham, AL, United States
- UAB Center for Exercise Medicine, The University of Alabama at Birmingham, Birmingham, AL, United States
| | - Kaleen M. Lavin
- The Florida Institute for Human and Machine Cognition, Pensacola, FL, United States
| | - Marcas M. Bamman
- Department of Cell, Developmental and Integrative Biology, The University of Alabama at Birmingham, Birmingham, AL, United States
- UAB Center for Exercise Medicine, The University of Alabama at Birmingham, Birmingham, AL, United States
- The Florida Institute for Human and Machine Cognition, Pensacola, FL, United States
- *Correspondence: Marcas M. Bamman
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Häkkinen K, Newton RU, Walker S, Häkkinen A, Krapi S, Rekola R, Koponen P, Kraemer WJ, Haff GG, Blazevich AJ, Nosaka K, Ahtiainen J. Effects of Upper Body Eccentric versus Concentric Strength Training and Detraining on Maximal Force, Muscle Activation, Hypertrophy and Serum Hormones in Women. J Sports Sci Med 2022; 21:200-213. [PMID: 35719226 PMCID: PMC9157521 DOI: 10.52082/jssm.2022.200] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 03/25/2022] [Indexed: 05/15/2023]
Abstract
Effects of eccentric (ECC) versus concentric (CON) strength training of the upper body performed twice a week for 10 weeks followed by detraining for five weeks on maximal force, muscle activation, muscle mass and serum hormone concentrations were investigated in young women (n = 11 and n = 12). One-repetition bench press (1RM), maximal isometric force and surface electromyography (EMG) of triceps brachii (TB), anterior deltoid (AD) and pectoralis major (PM), cross-sectional area (CSA) of TB (Long (LoH) and Lateral Head (LaH)) and thickness of PM, as well as serum concentrations of free testosterone, cortisol, follicle-stimulating hormone, estradiol and sex hormone-binding globulin were measured. ECC and CON training led to increases of 17.2 ± 11.3% (p < 0.001) and 13.1 ± 5.7% (p < 0.001) in 1RM followed by decreases of -6.6 ± 3.6% (p < 0.01) and -8.0 ± 4.5% (p < 0.001) during detraining, respectively. Isometric force increased in ECC by 11.4 ± 9.6 % (p < 0.05) from week 5 to 10, while the change in CON by 3.9±6.8% was not significant and a between group difference was noted (p < 0.05). Maximal total integrated EMG of trained muscles increased only in the whole subject group (p < 0.05). CSA of TB (LoH) increased in ECC by 8.7 ± 8.0% (p < 0.001) and in CON by 3.4 ± 1.6% (p < 0.01) and differed between groups (p < 0.05), and CSA of TB (LaH) in ECC by 15.7 ± 8.0% (p < 0.001) and CON by 9.7 ± 6.6% (p < 0.001). PM thickness increased in ECC by 17.7 ± 10.9% (p < 0.001) and CON by 14.0 ± 5.9% (p < 0.001). Total muscle sum value (LoH + LaH + PM) increased in ECC by 12.4 ± 6.9% (p < 0.001) and in CON by 7.1 ± 2.9% (p < 0.001) differing between groups (p < 0.05) and decreased during detraining in ECC by -6.5 ± 4.3% (p < 0.001) and CON by -6.1 ± 2.8% (p < 0.001). The post detraining combined sum value of CSA and thickness was in ECC higher (p < 0.05) than at pre training. No changes were detected in serum hormone concentrations, but baseline free testosterone levels in the ECC and CON group combined correlated with changes in 1RM (r = 0.520, p < 0.016) during training. Large neuromuscular adaptations of the upper body occurred in women during ECC, and CON training in 10 weeks. Isometric force increased only in response to ECC, and total muscle sum value increased more during ECC than CON training. However, no changes occurred in serum hormones, but individual serum-free testosterone baseline concentrations correlated with changes in 1RM during strength training in the entire group. Both groups showed significant decreases in neuromuscular performance and muscle mass during detraining, while post detraining muscle sum value was only in ECC significantly higher than at pre training.
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Affiliation(s)
- Keijo Häkkinen
- Neuromuscular Research Center, Faculty of Sport and Health Sciences, University of Jyväskylä, Finland
| | - Robert U Newton
- Exercise Medicine Research Institute, School of Medical and Health Sciences, Edith Cowan University, Australia
| | - Simon Walker
- Neuromuscular Research Center, Faculty of Sport and Health Sciences, University of Jyväskylä, Finland
| | - Arja Häkkinen
- Faculty of Sport and Health Sciences, University of Jyväskylä, Finland
| | - Sonja Krapi
- Neuromuscular Research Center, Faculty of Sport and Health Sciences, University of Jyväskylä, Finland
| | - Rebekka Rekola
- Neuromuscular Research Center, Faculty of Sport and Health Sciences, University of Jyväskylä, Finland
| | - Päivi Koponen
- Faculty of Sport and Health Sciences, University of Jyväskylä, Finland
| | - William J Kraemer
- Department of Human Sciences, The Ohio State University, Columbus, OH and Exercise Medicine Research Institute, Edith Cowan University, Australia
| | - G Gregory Haff
- Centre for Human Performance, School of Medical and Health Sciences, Edith Cowan University, Australia
| | - Anthony J Blazevich
- Centre for Human Performance, School of Medical and Health Sciences, Edith Cowan University, Australia
| | - Kazunori Nosaka
- Exercise Medicine Research Institute, School of Medical and Health Sciences, Edith Cowan University, Australia
- Centre for Human Performance, School of Medical and Health Sciences, Edith Cowan University, Australia
| | - Juha Ahtiainen
- Neuromuscular Research Center, Faculty of Sport and Health Sciences, University of Jyväskylä, Finland
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Lyristakis PM, Wundersitz DWT, Zadow EK, Mnatzaganian G, Gordon BA. The influence of considering individual resistance training variables as a whole on muscle strength: A systematic review and meta-analysis protocol. PLoS One 2022; 17:e0262674. [PMID: 35051219 PMCID: PMC8775318 DOI: 10.1371/journal.pone.0262674] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 12/30/2021] [Indexed: 01/05/2023] Open
Abstract
Examinations of the effect of resistance training (RT) on muscle strength have attempted to determine differences between prescriptions, mostly examining individual training variables. The broad interaction of variables does not appear to be completely considered, nor has a dose-response function been determined. This registered (doi.org/10.17605/OSF.IO/EH94V) systematic review with meta-analysis aims to determine if the interaction of individual training variables to derive RT dose, dosing, and dosage can influence muscle strength and determine if an optimal prescription range exists for developing muscle strength. To derive RT dose, the following calculation will be implemented: number of sets × number of repetitions × number of exercises × exercise intensity, while RT dosing factors in frequency and RT dosage considers program duration. A keyword search strategy utilising interchangeable terms for population (adult), intervention (resistance training), and outcomes (strength) will be conducted across three databases (CINAHL, MEDLINE, and SPORTDiscus). Novel to the field of exercise prescription, an analytical approach to determine the dose-response function for continuous outcomes will be used. The pooled standardised mean differences for muscle strength will be estimated using DerSimonian and Laird random effects method. Linear and non-linear dose-response relationships will be estimated by fitting fixed effects and random effects models using the one-stage approach to evaluate if there is a relationship between exercise dose, dosing and dosage and the effect on muscle strength. Maximised log-likelihood and the Akaike Information Criteria will be used to compare alternative best fitting models. Meta regressions will investigate between-study variances and a funnel plot and Egger's test will assess publication bias. The results from this study will identify if an optimal prescription range for dose, dosing and dosage exists to develop muscle strength.
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Affiliation(s)
- Philip M. Lyristakis
- Holsworth Research Initiative, La Trobe Rural Health School, La Trobe University, Victoria, Australia
| | - Daniel W. T. Wundersitz
- Holsworth Research Initiative, La Trobe Rural Health School, La Trobe University, Victoria, Australia
| | - Emma K. Zadow
- Holsworth Research Initiative, La Trobe Rural Health School, La Trobe University, Victoria, Australia
| | - George Mnatzaganian
- Rural Department of Community Health, La Trobe Rural Health School, La Trobe University, Victoria, Australia
- The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Brett A. Gordon
- Holsworth Research Initiative, La Trobe Rural Health School, La Trobe University, Victoria, Australia
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The Effect of Resistance Training in Healthy Adults on Body Fat Percentage, Fat Mass and Visceral Fat: A Systematic Review and Meta-Analysis. Sports Med 2021; 52:287-300. [PMID: 34536199 DOI: 10.1007/s40279-021-01562-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/03/2021] [Indexed: 12/26/2022]
Abstract
BACKGROUND Resistance training is the gold standard exercise mode for accrual of lean muscle mass, but the isolated effect of resistance training on body fat is unknown. OBJECTIVES This systematic review and meta-analysis evaluated resistance training for body composition outcomes in healthy adults. Our primary outcome was body fat percentage; secondary outcomes were body fat mass and visceral fat. DESIGN Systematic review with meta-analysis. DATA SOURCES We searched five electronic databases up to January 2021. ELIGIBILITY CRITERIA We included randomised trials that compared full-body resistance training for at least 4 weeks to no-exercise control in healthy adults. ANALYSIS We assessed study quality with the TESTEX tool and conducted a random-effects meta-analysis, with a subgroup analysis based on measurement type (scan or non-scan) and sex (male or female), and a meta-regression for volume of resistance training and training components. RESULTS From 11,981 records, we included 58 studies in the review, with 54 providing data for a meta-analysis. Mean study quality was 9/15 (range 6-15). Compared to the control, resistance training reduced body fat percentage by - 1.46% (95% confidence interval - 1.78 to - 1.14, p < 0.0001), body fat mass by - 0.55 kg (95% confidence interval - 0.75 to - 0.34, p < 0.0001) and visceral fat by a standardised mean difference of - 0.49 (95% confidence interval - 0.87 to - 0.11, p = 0.0114). Measurement type was a significant moderator in body fat percentage and body fat mass, but sex was not. Training volume and training components were not associated with effect size. Resistance training reduces body fat percentage, body fat mass and visceral fat in healthy adults. STUDY REGISTRATION osf.io/hsk32.
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Clifford B, Koizumi S, Wewege MA, Leake HB, Ha L, Macdonald E, Fairman CM, Hagstrom AD. The Effect of Resistance Training on Body Composition During and After Cancer Treatment: A Systematic Review and Meta-Analysis. Sports Med 2021; 51:2527-2546. [PMID: 34499338 DOI: 10.1007/s40279-021-01542-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/08/2021] [Indexed: 12/12/2022]
Abstract
BACKGROUND Changes in body composition during cancer treatments have been linked with poorer outcomes, and increased morbidity and mortality. The effect of resistance training (RT) on body composition in cancer cohorts is debated. OBJECTIVE We conducted a systematic review and meta-analysis to determine the effect of RT on body composition during and after treatment. METHODS We searched five electronic databases for articles up to 1 February 2021 and included randomized controlled trials that compared RT with a non-exercise control in adults with cancer. Risk of bias was assessed using the RoB 2 tool. Pairwise, random-effects meta-analysis was used to synthesize the available data. RESULTS Overall, we included 15 studies (n = 1368). After treatment (11 studies), RT increased lean mass with moderate heterogeneity {0.41 kg [95% confidence interval (CI) 0.05, 0.76], p = 0.029; I2 = 47.1%, p = 0.02} and decreased fat mass with substantial heterogeneity (- 0.59 kg [95% CI - 1.05, - 0.12], p = 0.019; I2 = 69.1%, p < 0.001). During treatment (4 studies), RT did not increase lean mass (0.71 kg [95% CI - 0.04, 1.45], p = 0.05; I2 = 0.0%, p = 0.75) or reduce fat mass (0.00 kg [95% CI - 5.31, 5.30], p = 0.99; I2 = 0.0%, p = 0.62), both with no heterogeneity. CONCLUSION Modest improvements in body composition were observed following RT after cancer treatment; however, no changes were observed during treatment. These adaptations are markedly lower than those observed in healthy cohorts but may be clinically meaningful for the cancer survivorship population. At present it is unclear if these diminished adaptations are due to ineffective exercise prescriptions in cancer cohorts or due to an innate anabolic resistance as a result of cancer and its treatments. STUDY REGISTRATION Open Science Framework (osf.io/x6z72).
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Affiliation(s)
- Briana Clifford
- Department of Exercise Physiology, School of Health Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Sean Koizumi
- Department of Exercise Physiology, School of Health Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Michael A Wewege
- Department of Exercise Physiology, School of Health Sciences, University of New South Wales, Sydney, NSW, Australia.,Centre for Pain IMPACT, Neuroscience Research Australia, Sydney, NSW, Australia
| | - Hayley B Leake
- Centre for Pain IMPACT, Neuroscience Research Australia, Sydney, NSW, Australia.,IIMPACT in Health, University of South Australia, Adelaide, SA, Australia
| | - Lauren Ha
- Department of Exercise Physiology, School of Health Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Eliza Macdonald
- Department of Exercise Physiology, School of Health Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Ciaran M Fairman
- Exercise Science Department, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA
| | - Amanda D Hagstrom
- Department of Exercise Physiology, School of Health Sciences, University of New South Wales, Sydney, NSW, Australia.
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Versic S, Idrizovic K, Ahmeti GB, Sekulic D, Majeric M. Differential Effects of Resistance- and Endurance-Based Exercise Programs on Muscular Fitness, Body Composition, and Cardiovascular Variables in Young Adult Women: Contextualizing the Efficacy of Self-Selected Exercise Modalities. MEDICINA (KAUNAS, LITHUANIA) 2021; 57:654. [PMID: 34202379 PMCID: PMC8304697 DOI: 10.3390/medicina57070654] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 06/18/2021] [Accepted: 06/24/2021] [Indexed: 01/05/2023]
Abstract
There is an evident lack of research simultaneously investigating endurance training (ET) and resistance training (RT) with regard to their potential influence on fitness and health status in young women. This study aimed to determine the effects of RT and ET three times a week over an eight-week period on anthropometric/body composition indices, blood pressure (BP), and muscular fitness in apparently healthy young women who participated in a self-preferred program. The sample of participants comprised 57 young healthy women (23.9 ± 3.08 years, 165.5 ± 5.8 cm, 66.8 ± 7.2 kg) divided into ET (n = 18), RT (n = 19), and non-exercising (C) (n = 20) groups. The variables consisted of anthropometric/body composition indices (body mass, BMI, body fat, and lean body mass), muscular fitness variables (lower body strength, upper body strength, abdominal strength, dynamometric force, and flexibility), and cardiovascular parameters (resting heart rate and systolic and diastolic BP). A pre- and post-testing design, with factorial analysis of variance for repeated measurements (ANOVA: Group × Measurement), including a consecutive post hoc test, was applied. The ANOVA indicated a similar improvement in body composition (increase in lean body mass and decrease in body fat percentage), resting heart rate, and flexibility in both of the exercise groups, with no significant changes in the C group. RT improved the participants' strength and force capacities to a greater extent than ET. BP showed a trend of improvement in both of the training groups, but without statistically significant pre- to post-changes. Correlation analysis calculated with variables of pre- to post-differences (VDs) indicated poor associations between VDs, indicating relative independence of the obtained effects for the different variables in each training group. Although this investigation comprised apparently healthy young women, numerous positive changes indicated the efficacy of both programs in a relatively short period of time. While the participants in this study self-selected training programs, the evidenced positive effects can be at least partially related to this fact.
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Affiliation(s)
- Sime Versic
- Faculty of Kinesiology, University of Split, 21000 Split, Croatia;
| | - Kemal Idrizovic
- Faculty for Sport and Physical Education, University of Montenegro, 81400 Niksic, Montenegro;
| | - Gentiana Beqa Ahmeti
- Faculty of Physical Education and Sport, University of Prishtina, 10000 Prishtina, Kosovo;
| | - Damir Sekulic
- Faculty of Kinesiology, University of Split, 21000 Split, Croatia;
| | - Matej Majeric
- Faculty of Sport, University of Ljubljana, 10000 Ljubljana, Slovenia;
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34
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Jones MD, Wewege MA, Hackett DA, Keogh JWL, Hagstrom AD. Sex Differences in Adaptations in Muscle Strength and Size Following Resistance Training in Older Adults: A Systematic Review and Meta-analysis. Sports Med 2021; 51:503-517. [PMID: 33332016 DOI: 10.1007/s40279-020-01388-4] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BACKGROUND Reductions in muscle size and strength occur with aging. These changes can be mitigated by participation in resistance training. At present, it is unknown if sex contributes to differences in adaptation to resistance training in older adults. OBJECTIVE The aim of this systematic review was to determine if sex differences are apparent in adaptations to resistance training in older adults. DESIGN Systematic review with meta-analysis. DATA SOURCES Web of Science; Science Direct; SPORTDiscus; CINAHL; and MEDLINE were searched from inception to June 2020. ELIGIBILITY CRITERIA Studies where males and females older than 50 years of age performed identical resistance training interventions and had outcome measures of muscle strength or size. RESULTS We initially screened 5337 studies. 30 studies (with 41 comparison groups) were included in our review (1410 participants; 651 males, 759 females). Mean study quality was 14.7/29 on a modified Downs and Black checklist, considered moderate quality. Females gained more relative lower-body strength than males (g = - 0.21 [95% CI - 0.33, - 0.10], p = 0.0003) but there were no differences in relative change for upper-body strength (g = - 0.29 [95% CI - 0.62, 0.04], p = 0.08) or relative muscle size (g = 0.10 [95% CI - 0.04, 0.23], p = 0.16). Males gained more absolute upper-body strength (g = 0.48 [95% CI 0.09, 0.88], p = 0.016), absolute lower-body strength (g = 0.33 [95% CI 0.19, 0.47], p < 0.0001), and absolute muscle size (g = 0.45 [95% CI 0.23, 0.66], p < 0.0001). CONCLUSION Our results indicate that sex differences in adaptations to resistance training are apparent in older adults. However, it is evident that the interpretation of sex-dependent adaptations to resistance training is heavily influenced by the presentation of the results in either an absolute or relative context. STUDY REGISTRATION Open Science Framework (osf.io/afn3y/).
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Affiliation(s)
- Matthew D Jones
- School of Medical Sciences, University of New South Wales, Sydney, NSW, Australia
- Centre for Pain IMPACT, Neuroscience Research Australia, Sydney, NSW, Australia
| | - Michael A Wewege
- School of Medical Sciences, University of New South Wales, Sydney, NSW, Australia
- Centre for Pain IMPACT, Neuroscience Research Australia, Sydney, NSW, Australia
| | - Daniel A Hackett
- Physical Activity, Lifestyle, Ageing and Wellbeing Faculty Research Group, School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Lidcombe, NSW, Australia
| | - Justin W L Keogh
- Faculty of Health Sciences and Medicine, Bond University, Gold Coast, QLD, Australia
- Human Potential Centre, AUT University, Auckland, New Zealand
- Cluster for Health Improvement, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Sunshine Coast, QLD, Australia
- Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Amanda D Hagstrom
- School of Medical Sciences, University of New South Wales, Sydney, NSW, Australia.
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35
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Polito MD, Papst RR, Farinatti P. Moderators of strength gains and hypertrophy in resistance training: A systematic review and meta-analysis. J Sports Sci 2021; 39:2189-2198. [PMID: 33977848 DOI: 10.1080/02640414.2021.1924978] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
This meta-analysis investigated the role of resistance training (RT) moderators on strength and muscle mass gains in untrained young (YG) and older (OG) adults. Electronic databases were searched for randomised controlled trials simultaneously assessing muscle strength and mass. Effect sizes (ES) reflecting improvements in strength and muscle mass were found for all moderators in YG and OG (ES 0.25- to 1.72;p < 0.05), excepting muscle mass in YG after RT was performed with <3 sets/exercise. Strength gains (p < 0.001) were greater in non-periodised vs. periodised RT in YG (ES 1.72 vs. 1.05) and OG (1.40 vs. 0.74). ES in OG was greater (p < 0.04) when RT included non-failure vs. failure repetitions (1.35 vs. 0.96), 3 vs. >3 sets/exercise (1.30 vs. 0.90), ≥3 vs. <3 days/week (1.70 vs. 0.78), and ≥12 vs. <12 weeks (1.48 vs. 0.92). Amoderating effect of RT factors on muscle mass was not detected in YG, while greater ES was found in OG for RT with ≥3 vs. <3 days/week (0.50 vs. 0.25). Concluding, different combinations of RT factors improved strength and muscle mass in YG and OG. In OG, this was favoured by greater frequency and duration, although hampered by excessive volume.
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Affiliation(s)
- Marcos D Polito
- Physical Education Department, State University of Londrina, Londrina, PR Brazil
| | - Rafael R Papst
- Physical Education Department, State University of Londrina, Londrina, PR Brazil
| | - Paulo Farinatti
- Laboratory of Physical Activity and Health Promotion, University of Rio de Janeiro State, Rio de Janeiro, Brazil.,Graduate Program in Physical Activity Sciences, Salgado de Oliveira University, Rio de Janeiro, Brazil
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36
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Schoenfeld BJ, Grgic J, Van Every DW, Plotkin DL. Loading Recommendations for Muscle Strength, Hypertrophy, and Local Endurance: A Re-Examination of the Repetition Continuum. Sports (Basel) 2021; 9:sports9020032. [PMID: 33671664 PMCID: PMC7927075 DOI: 10.3390/sports9020032] [Citation(s) in RCA: 81] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 02/10/2021] [Accepted: 02/15/2021] [Indexed: 12/16/2022] Open
Abstract
Loading recommendations for resistance training are typically prescribed along what has come to be known as the “repetition continuum”, which proposes that the number of repetitions performed at a given magnitude of load will result in specific adaptations. Specifically, the theory postulates that heavy load training optimizes increases maximal strength, moderate load training optimizes increases muscle hypertrophy, and low-load training optimizes increases local muscular endurance. However, despite the widespread acceptance of this theory, current research fails to support some of its underlying presumptions. Based on the emerging evidence, we propose a new paradigm whereby muscular adaptations can be obtained, and in some cases optimized, across a wide spectrum of loading zones. The nuances and implications of this paradigm are discussed herein.
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Affiliation(s)
- Brad J. Schoenfeld
- Department of Health Sciences, CUNY Lehman College, Bronx, NY 10468, USA; (D.W.V.E.); (D.L.P.)
- Correspondence:
| | - Jozo Grgic
- Institute for Health and Sport, Victoria University, Melbourne, VIC 8001, Australia;
| | - Derrick W. Van Every
- Department of Health Sciences, CUNY Lehman College, Bronx, NY 10468, USA; (D.W.V.E.); (D.L.P.)
| | - Daniel L. Plotkin
- Department of Health Sciences, CUNY Lehman College, Bronx, NY 10468, USA; (D.W.V.E.); (D.L.P.)
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37
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Hettchen M, von Stengel S, Kohl M, Murphy MH, Shojaa M, Ghasemikaram M, Bragonzoni L, Benvenuti F, Ripamonti C, Benedetti MG, Julin M, Risto T, Kemmler W. Changes in Menopausal Risk Factors in Early Postmenopausal Osteopenic Women After 13 Months of High-Intensity Exercise: The Randomized Controlled ACTLIFE-RCT. Clin Interv Aging 2021; 16:83-96. [PMID: 33469276 PMCID: PMC7810823 DOI: 10.2147/cia.s283177] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 11/19/2020] [Indexed: 12/13/2022] Open
Abstract
The menopausal transition is a critical period in women's lives. Exercise might be the most promising non-pharmaceutic intervention to address the large variety of risk factors related to the pronounced estradiol decline during peri- and early-postmenopause. The aim of this study was to determine the effect of an 18-month multipurpose exercise program on risk factors and symptoms related to the menopausal transition. Fifty-four women 1-5 years postmenopause with osteopenia or osteoporosis were randomly assigned 1) to a high impact weight-bearing/high-intensity/velocity resistance training group (EG: n=27) exercising three times a week or 2) to an attendance control group (CG: n=27) that performed low-intensity exercise once a week. Both groups were supplemented with cholecalciferol and calcium. The primary study endpoint was bone mineral density (BMD) at lumbar spine (LS) and total hip, secondary outcomes were lean body mass (LBM), total and abdominal body percentage, metabolic syndrome Z-Score (MetS-Z), menopausal symptoms and muscle strength and power. Due to COVID-19, the study was stopped after 13 months. We observed significant effects for BMD-LS (EG: 0.002±.018 versus CG: -.009±0.018 mg/cm2, p=0.027) but not for BMD total hip (EG: -0.01±.016 versus CG: -.009±0.020 mg/cm2, p=0.129). LBM improved significantly in the EG and decreased in the CG (0.39±1.08 vs -0.37±1.34 kg, p=0.026). Total and abdominal body fat improved significantly in the EG and was maintained in the CG (-1.44±1.49 vs -0.02±1.55 kg, p=0.002 and -1.50±2.33 vs 0.08±2.07 kg, p=0.011). Significant effects in favor of the EG were also determined for menopausal symptoms (p=0.029), hip/leg extension strength (p<0.001) and power (p<0.001). However, changes of the MetS-Z did not differ significantly (p=0.149) between EG and CG. In summary, with minor exceptions, we demonstrated the effectiveness of a multipurpose exercise protocol dedicated to early-postmenopausal women on various risk factors and complaints related to the menopausal transition.
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Affiliation(s)
- Michael Hettchen
- Institute of Medical Physics, Friedrich-Alexander University Erlangen-Nürnberg, Erlangen, Germany
| | - Simon von Stengel
- Institute of Medical Physics, Friedrich-Alexander University Erlangen-Nürnberg, Erlangen, Germany
| | - Matthias Kohl
- Department of Medical and Life Sciences, University of Furtwangen, Schwenningen, Germany
| | - Marie H Murphy
- Doctoral College, Ulster University, Newtownabbey, Antrim, Northern Ireland, UK
| | - Mahdieh Shojaa
- Institute of Medical Physics, Friedrich-Alexander University Erlangen-Nürnberg, Erlangen, Germany
| | - Mansour Ghasemikaram
- Institute of Medical Physics, Friedrich-Alexander University Erlangen-Nürnberg, Erlangen, Germany
| | | | | | - Claudio Ripamonti
- Center for Osteoporosis and Bone Metabolic Disease, Rizzoli Orthopaedic Institute, Bologna, Italy
| | - Maria Grazia Benedetti
- Physical Medicine and Rehabilitation Unit, IRCCS - Rizzoli Orthopaedic Institute, Bologna, Italy
| | - Mikko Julin
- Laurea University of Applied Sciences, Espoo, Finland
| | - Tapani Risto
- Laurea University of Applied Sciences, Espoo, Finland
| | - Wolfgang Kemmler
- Institute of Medical Physics, Friedrich-Alexander University Erlangen-Nürnberg, Erlangen, Germany
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38
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Jenkins NDM, Rogers EM, Banks NF, Muddle TWD, Colquhoun RJ. Increases in motor unit action potential amplitudes are related to muscle hypertrophy following eight weeks of high-intensity exercise training in females. Eur J Sport Sci 2020; 21:1403-1413. [DOI: 10.1080/17461391.2020.1836262] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Nathaniel D. M. Jenkins
- Applied Neuromuscular Physiology Laboratory, Oklahoma State University, Stillwater, OK, USA
- Department of Health and Human Physiology, University of Iowa, Iowa City, IA, USA
| | - Emily. M. Rogers
- Applied Neuromuscular Physiology Laboratory, Oklahoma State University, Stillwater, OK, USA
- Department of Health and Human Physiology, University of Iowa, Iowa City, IA, USA
| | - Nile F. Banks
- Applied Neuromuscular Physiology Laboratory, Oklahoma State University, Stillwater, OK, USA
- Department of Health and Human Physiology, University of Iowa, Iowa City, IA, USA
| | - Tyler W. D. Muddle
- Applied Neuromuscular Physiology Laboratory, Oklahoma State University, Stillwater, OK, USA
| | - Ryan J. Colquhoun
- Department of Health, Kinesiology and Sport, University of South Alabama, Mobile, AL, USA
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39
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Health-Related Physical Fitness Benefits in Sedentary Women Employees after an Exercise Intervention with Zumba Fitness ®. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17082632. [PMID: 32290490 PMCID: PMC7216059 DOI: 10.3390/ijerph17082632] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 04/06/2020] [Accepted: 04/08/2020] [Indexed: 12/31/2022]
Abstract
Background: The protective properties of high physical fitness levels on health are manifest independently of age, sex, fatness, smoking, alcohol consumption, and other clinical factors. However, women are less active than men, which contributes to low physical fitness and a high risk of CVD. Thus, the objective of this study is to analyze the effect of two exercise interventions on health-related physical fitness in sedentary employed females. Methods: A total of 98 physically inactive adult women were randomly assigned to 3 study groups: the control group (CG) = 31, the endurance training group based on Zumba Fitness® classes (ET; n = 39), and the concurrent training group that had an extra muscle-strengthening workout after the Zumba Fitness® class (CnT; n = 28). Body composition (BMI, waist circumference), motor fitness (one-leg stand test), musculoskeletal fitness (shoulder–neck mobility, handgrip strength test, jump and reach test, and dynamic sit-up test), and cardiorespiratory fitness (2-km test and estimated VO2 max) were assessed with the ALPHA-Fit test battery for adults. Results: Both interventions showed a significant improvement in the majority of health-related fitness and body composition variables/test (waist circumference: ET = −2.275 ± 0.95, p = 0.02, CnT = −2.550 ± 1.13, p = 0.03; one-stand leg test: ET = 13.532 ± 2.65, p < 0.001; CnT = 11.656 ± 2.88, p < 0.001; shoulder–neck mobility: ET = 1.757 ± 0.44, p < 0.001, CnT = 2.123 ± 0.47, p < 0.001; handgrip test: 0.274 ± 0.08, p < 0.001, CnT = 0.352 ± 0.08, p < 0.001; dynamic sit-up: ET = 1.769 ± 0.45, p < 0.001, CnT = −1.836 ± 0.49, p < 0.001; 2-km test time: −1.280 ± 0.25, p < 0.001, CnT = −1.808 ± 0.28, p < 0.001; estimated VO2 max: ET = 1.306 ± 0.13, p < 0.001, CnT = 1.191 ± 0.15, p < 0.001). There were no significant differences after the intervention between the two exercise intervention groups. Conclusions: Exercise interventions based on Zumba fitness® or Zumba fitness® combined with an extra muscle-strengthening workout based on bodyweight training exercises are effective strategies to improve the health-related physical fitness in sedentary women employees.
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40
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Endurance Training vs. Circuit Resistance Training: Effects on Lipid Profile and Anthropometric/Body Composition Status in Healthy Young Adult Women. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17041222. [PMID: 32074953 PMCID: PMC7068336 DOI: 10.3390/ijerph17041222] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Revised: 02/10/2020] [Accepted: 02/11/2020] [Indexed: 12/20/2022]
Abstract
Background: Endurance training (ET) and resistance training (RT) are known to be effective in improving anthropometric/body composition and lipid panel indicators, but there is an evident lack of studies on differential effects of these two forms of physical exercise (PE). This study aimed to evaluate the differential effects of 8-week ET and RT among young adult women. Methods: Participants were women (n = 57; age: 23 ± 3 years; initial body height: 165 ± 6 cm; body mass: 66.79 ± 7.23 kg; BMI: 24.37 ± 2.57 kg/m2) divided into the ET group (n = 20), RT group (n = 19), and non-exercising control group (n = 18). All participants were tested for cardiovascular risk factors (CRF), including total cholesterol, high density lipoprotein (HDL), low density lipoprotein (LDL), triglycerides, glucose, and anthropometric/body composition (body mass, body mass index, skinfold measures, body fat %) at the beginning and at the end of the study. Over the 8 weeks, the ET group trained three times/week on a treadmill while the RT group participated in equal number of circuit weight training sessions. Both types of training were planned according to participants’ pre-study fitness status. Results: A two-factor analysis of variance for repeated measurements (“group” × “measurement”) revealed significant main effects for “measurement” in CRF. The “group × measurement” interaction was significant for CRF. The post-hoc analysis indicated significant improvements in CRF for RT and ET. No significant differential effects between RT and ET were evidenced. Conclusions: The results of this study evidence improvements of CRF in young adult women as a result of 8-week ET and RT. The lack of differential training-effects may be attributed to the fact that all participants underwent pre-study screening of their fitness status, which resulted in application of accurate training loads.
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