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Hill V, Patterson S, Buckthorpe M, Legg HS. The Acute Effects of a Preload Upper-Body Power Exercise on 50-m Freestyle Performance in Youth Swimmers. J Strength Cond Res 2024; 38:1295-1299. [PMID: 38900175 DOI: 10.1519/jsc.0000000000004792] [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: 06/21/2024]
Abstract
ABSTRACT Hill, V, Patterson, S, Buckthorpe, M, and Legg, HS. The acute effects of a preload upper-body power exercise on 50-m freestyle performance in youth swimmers. J Strength Cond Res 38(7): 1295-1299, 2024-This study aimed to investigate the acute effects of a medicine ball slam and the optimal recovery time required to induce a postactivation performance enhancement (PAPE) response on 50-meter freestyle swimming performance. Twenty-four (13 female, 11 male) competitive, adolescent swimmers (mean ± SD: age, 16.7 ± 1.2 years; height, 173.3 ± 6.7 cm; mass, 63.1 ± 6.4 kg) participated in a randomized crossover study. After the PAPE intervention (3 × 5 medicine ball slams), subjects had 1-minute, 4-minute, and 8-minute recovery periods before a 50-m maximal freestyle swim. A 1-way repeated-measures ANOVA revealed that different recovery times elicited changes in 50-m performance (F = 12.12, p < 0.0005). After 4 minutes of recovery, 50-m performance was 1.6% (0.47 seconds) faster (95% confidence interval [CI] [0.17-0.77], p < 0.001). When the data were split by sex, after 4 minutes of recovery, 50-m performance was 2% (0.64 seconds) faster for women (95% CI [0.279-0.998], p < 0.001). In conclusion, an upper-body power exercise, before performance, can induce a PAPE response and enhance 50-m freestyle performance after a 4-minute recovery period.
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Affiliation(s)
- Victoria Hill
- Faculty of Sport, Technology and Health Sciences. St Mary's University, London, United Kingdom; and
| | - Stephen Patterson
- Faculty of Sport, Technology and Health Sciences. St Mary's University, London, United Kingdom; and
| | - Matthew Buckthorpe
- Faculty of Sport, Technology and Health Sciences. St Mary's University, London, United Kingdom; and
| | - Hayley S Legg
- School of Education and Science, University of Gloucestershire, United Kingdom
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2
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da Silva SDCS, Pires FDO, Serra LDLP, Reis CBF, de Abreu LP, Pereira PTVT, Cabido CET, Leite RD. Effects of different resistance training programmings on the relative strength, body composition, anthropometric variables, and metabolic risk of elderly women. J Bodyw Mov Ther 2024; 39:496-504. [PMID: 38876674 DOI: 10.1016/j.jbmt.2024.02.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 12/03/2023] [Accepted: 02/25/2024] [Indexed: 06/16/2024]
Abstract
The purpose of this study was to analyze the effect of two different programming models of resistance training (RT) on metabolic risk, anthropometric variables, and relative strength in elderly women. The research was a prospective and comparative longitudinal study with a non-probabilistic random sample. Twenty-two elderly women (64 ± 3 years) was divided into two experimental groups being the Linear programming (LP, n = 12) and Daily undulatory programming (DUP, n = 10), with 3 sessions/week for 12 weeks. Submaximal strength (10RM) was evaluated in the horizontal leg press (HL), pulldown (PD), leg curl (LC), vertical bench press (BP), and leg extension (LE). Anthropometric variables, food intake (R24h) and submaximal strength (10RM) was analyzed. Participants were initially classified as overweight or obese evaluated by body mass index (BMI) and percentual of fat mass (%FM) and with moderate to high risk to develop metabolic diseases evaluated by hip-waist ratio (HWR), waist-height ratio (WHR) and waist circumference (WC). There is no change for metabolic risk and anthropometric variables after the intervention period. There was a significant improvement for relative strength accessed by 10RM and body weight (10RM/BW), and lean body mass (10RM/LBM) (p < 0.05), with large or medium effect size for most of variables after 12 weeks of RT. As a conclusion, both programmings increased relative strength after 12 weeks of RT with attenuated change in body composition and metabolic risk in elderly women in both programming groups and all those strategies can be used in elderly women to improve strength.
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Affiliation(s)
- Surama do Carmo Souza da Silva
- Federal University of Maranhão, São Luís, MA, Brazil; Postgraduate Program in Science Health, Federal University of Maranhão, São Luís, MA, Brazil.
| | - Flavio de Oliveira Pires
- Federal University of Maranhão, São Luís, MA, Brazil; Postgraduate Program in Physical Education, Federal University of Maranhão, São Luís, MA, Brazil
| | | | - Carlos Brendo Ferreira Reis
- Postgraduate Program in Physical Education of Federal University of Espírito Santo, Center of Physical Education and Sports, Sports Department, Laboratory of Exercise Physiology (LAFEX), Vitoria, Brazil
| | - Leudyenne Pacheco de Abreu
- Federal University of Maranhão, São Luís, MA, Brazil; Postgraduate Program in Physical Education, Federal University of Maranhão, São Luís, MA, Brazil
| | - Paula Tâmara Vieira Teixeira Pereira
- Federal University of Maranhão, São Luís, MA, Brazil; Postgraduate Program in Science Health, Federal University of Maranhão, São Luís, MA, Brazil
| | - Christian Emmanuel Torres Cabido
- Federal University of Maranhão, São Luís, MA, Brazil; Postgraduate Program in Physical Education, Federal University of Maranhão, São Luís, MA, Brazil
| | - Richard Diego Leite
- Postgraduate Program in Physical Education of Federal University of Espírito Santo, Center of Physical Education and Sports, Sports Department, Laboratory of Exercise Physiology (LAFEX), Vitoria, Brazil
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Yang X, Zhang B, Liu Y, Lv Q, Guo J. Automatic Quantitative Assessment of Muscle Strength Based on Deep Learning and Ultrasound. ULTRASONIC IMAGING 2024:1617346241255590. [PMID: 38881032 DOI: 10.1177/01617346241255590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2024]
Abstract
Skeletal muscle is a vital organ that promotes human movement and maintains posture. Accurate assessment of muscle strength is helpful to provide valuable insights for athletes' rehabilitation and strength training. However, traditional techniques rely heavily on the operator's expertise, which may affect the accuracy of the results. In this study, we propose an automated method to evaluate muscle strength using ultrasound and deep learning techniques. B-mode ultrasound data of biceps brachii of multiple athletes at different strength levels were collected and then used to train our deep learning model. To evaluate the effectiveness of this method, this study tested the contraction of the biceps brachii under different force levels. The classification accuracy of this method for grade 4 and grade 6 muscle strength reached 98% and 96%, respectively, and the overall average accuracy was 93% and 87%, respectively. The experimental results confirm that the innovative methods in this paper can accurately and effectively evaluate and classify muscle strength.
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Affiliation(s)
- Xiao Yang
- Key Laboratory of Ultrasound of Shaanxi Province, School of Physics and Information Technology, Shaanxi Normal University, Xi'an, China
| | - Beilei Zhang
- Key Laboratory of Ultrasound of Shaanxi Province, School of Physics and Information Technology, Shaanxi Normal University, Xi'an, China
| | - Ying Liu
- Key Laboratory of Ultrasound of Shaanxi Province, School of Physics and Information Technology, Shaanxi Normal University, Xi'an, China
| | - Qian Lv
- Key Laboratory of Ultrasound of Shaanxi Province, School of Physics and Information Technology, Shaanxi Normal University, Xi'an, China
| | - Jianzhong Guo
- Key Laboratory of Ultrasound of Shaanxi Province, School of Physics and Information Technology, Shaanxi Normal University, Xi'an, China
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Kelly E, Nazeer S, Fazzini B, Sutt AL, Olusanya S, Campion T, Puthucheary Z. Assessing the oral and suprahyoid muscles in healthy adults using muscle ultrasound to inform the swallowing process: a proof-of-concept study. Sci Rep 2024; 14:13198. [PMID: 38851791 PMCID: PMC11162466 DOI: 10.1038/s41598-024-62032-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Accepted: 05/13/2024] [Indexed: 06/10/2024] Open
Abstract
The oral and suprahyoid muscles are responsible for movements of swallowing. Our study aimed to determine the reproducibility of static and dynamic measurements of these muscles using bedside ultrasound equipment. Forty healthy participants were recruited prospectively. Primary outcomes were evaluation of mass measurements of the anterior bellies of the digastric, mylohyoid, geniohyoid and tongue in B-mode ultrasound. Secondary outcomes were evaluation of geniohyoid muscle layer thickness and function using M-mode. Muscle mass measurements demonstrated little within-participant variability. Coefficient of Variance (CoV) across muscles were: anterior belly digastric (5.0%), mylohyoid (8.7%), geniohyoid (5.0%) and tongue (3.2%). A relationship between sex (r2 = 0.131 p = 0.022) was demonstrated for the geniohyoid muscle, with males having higher transverse Cross Sectional Area (CSA) (14.3 ± 3.6 mm vs. 11.9 ± 2.5 mm, p = 0.002). Tongue size was correlated with weight (r2 = 0.356, p = 0.001), height (r2 = 0.156, p = 0.012) and sex (r2 = 0.196, p = 0.004). Resting thickness of the geniohyoid muscle layer changed with increasing bolus sizes (f = 3.898, p = 0.026). Velocity increased with bolus size (p = < 0.001, F = 8.974). However swallow time and slope distance did not, potentially influenced by higher coefficients of variation. Oral and suprahyoid muscle mass are easily assessed using bedside ultrasound. Ultrasound may provide new information about muscle mass and function during swallowing.
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Affiliation(s)
- Eileen Kelly
- Adult Critical Care Unit, The Royal London Hospital, Barts Health NHS Trust, London, E1 1BB, UK.
- Critical Care and Perioperative Medicine Research Group, William Harvey Research Institute, Queen Mary University of London, London, UK.
- Department of Speech and Language Therapy, The Royal London Hospital, Barts Health NHS Trust, London, UK.
| | - Saira Nazeer
- Adult Critical Care Unit, The Royal London Hospital, Barts Health NHS Trust, London, E1 1BB, UK
- Critical Care and Perioperative Medicine Research Group, William Harvey Research Institute, Queen Mary University of London, London, UK
| | - Brigitta Fazzini
- Adult Critical Care Unit, The Royal London Hospital, Barts Health NHS Trust, London, E1 1BB, UK
- Critical Care and Perioperative Medicine Research Group, William Harvey Research Institute, Queen Mary University of London, London, UK
| | - Anna-Liisa Sutt
- Department of Speech and Language Therapy, The Royal London Hospital, Barts Health NHS Trust, London, UK
- Critical Care Research Group, Institute of Molecular Bioscience, University of Queensland, Brisbane, Australia
| | - Segun Olusanya
- Consultant in Intensive Care Medicine and ECMO, Department of Perioperative Medicine, Barts Heart Centre, London, UK
| | - Thomas Campion
- Consultant Head and Neck Neck/Neuroradiologist, The Royal London Hospital, Barts Health NHS Trust, London, UK
| | - Zudin Puthucheary
- Adult Critical Care Unit, The Royal London Hospital, Barts Health NHS Trust, London, E1 1BB, UK
- Critical Care and Perioperative Medicine Research Group, William Harvey Research Institute, Queen Mary University of London, London, UK
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Zhou M, Wei Y, Feng Y, Zhang S, Ma N, Wang K, Tan P, Zhao Y, Zhao J, Ma X. Arginine Regulates Skeletal Muscle Fiber Type Formation via mTOR Signaling Pathway. Int J Mol Sci 2024; 25:6184. [PMID: 38892371 PMCID: PMC11173221 DOI: 10.3390/ijms25116184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Revised: 05/28/2024] [Accepted: 05/31/2024] [Indexed: 06/21/2024] Open
Abstract
The composition of skeletal muscle fiber types affects the quality of livestock meat and human athletic performance and health. L-arginine (Arg), a semi-essential amino acid, has been observed to promote the formation of slow-twitch muscle fibers in animal models. However, the precise molecular mechanisms are still unclear. This study investigates the role of Arg in skeletal muscle fiber composition and mitochondrial function through the mTOR signaling pathway. In vivo, 4-week C56BL/6J male mice were divided into three treatment groups and fed a basal diet supplemented with different concentrations of Arg in their drinking water. The trial lasted 7 weeks. The results show that Arg supplementation significantly improved endurance exercise performance, along with increased SDH enzyme activity and upregulated expression of the MyHC I, MyHC IIA, PGC-1α, and NRF1 genes in the gastrocnemius (GAS) and quadriceps (QUA) muscles compared to the control group. In addition, Arg activated the mTOR signaling pathway in the skeletal muscle of mice. In vitro experiments using cultured C2C12 myotubes demonstrated that Arg elevated the expression of slow-fiber genes (MyHC I and Tnnt1) as well as mitochondrial genes (PGC-1α, TFAM, MEF2C, and NRF1), whereas the effects of Arg were inhibited by the mTOR inhibitor rapamycin. In conclusion, these findings suggest that Arg modulates skeletal muscle fiber type towards slow-twitch fibers and enhances mitochondrial functions by upregulating gene expression through the mTOR signaling pathway.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Xi Ma
- State Key Laboratory of Animal Nutrition and Feeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China; (M.Z.); (Y.W.); (Y.F.); (S.Z.); (N.M.); (K.W.); (P.T.); (Y.Z.); (J.Z.)
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Hughes W, Healy R, Lyons M, Higginbotham C, Lane A, Beattie K. The Strength Characteristics of Elite and Subelite Female Gaelic Football Players. J Strength Cond Res 2024; 38:1072-1081. [PMID: 38489587 DOI: 10.1519/jsc.0000000000004741] [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: 03/17/2024]
Abstract
ABSTRACT Hughes, W, Healy, R, Lyons, M, Higginbotham, C, Lane, A, and Beattie, K. The strength characteristics of elite and subelite female Gaelic football players. J Strength Cond Res 38(6): 1072-1081, 2024-There is currently an underrepresentation of sports science research focused on the female athlete, specifically in the context of Gaelic football. The aims of this study are to (a) compare the strength characteristics of elite and subelite players and (b) establish normative-based values and percentile scores for the strength characteristics of female Gaelic football players. Ninety-two female Gaelic football players were recruited for this study and subsequently categorized as elite (intercounty n = 30, age; 25.1 ± 5.3 years, stature; 1.69 ± 0.06 m, mass; 69.5 ± 5.9 kg) or subelite (club n = 62, age; 25.4 ± 6.8 years, stature; 1.66 ± 0.06 m, mass; 65.1 ± 8.9 kg). The physical strength characteristics of the subjects were assessed through the isometric midthigh pull (IMTP), countermovement jump (CMJ), and 10-5 repeated jump test. Statistically significant differences were found in the physical strength characteristics between the groups with elite players demonstrating greater peak force (large effect), relative peak force (moderate effect), and reactive strength index (large effect). Statistically significant differences were also observed for key CMJ phase characteristics with elite players producing greater RSI mod (moderate effect), jump height (large effect), and propulsion peak power (large effect) than subelite players. This study demonstrated that there are moderate to large differences between playing standards with elite players displaying superior reactive-, explosive-, and maximal-strength than their subelite counterparts. The strength characteristics evaluated in this study may be used in conjunction with other performance indices to distinguish between elite and subelite playing standards in female Gaelic football players.
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Affiliation(s)
- William Hughes
- Department of Sport and Health Sciences, Technological University of the Shannon: Midlands Midwest, Athlone, Ireland
- SHE Research Group, Technological University of the Shannon: Midlands Midwest, Athlone, Ireland
| | - Robin Healy
- Department of Sport and Health Sciences, Technological University of the Shannon: Midlands Midwest, Athlone, Ireland
- SHE Research Group, Technological University of the Shannon: Midlands Midwest, Athlone, Ireland
| | - Mark Lyons
- Department of Physical Education and Sports Sciences, Sport and Human Performance Research Centre, University of Limerick, Limerick, Ireland
| | - Clement Higginbotham
- Department of Mechanical, Polymer, and Design, Technological University of the Shannon: Midlands Midwest, Athlone, Ireland; and
- SHE Research Group, Technological University of the Shannon: Midlands Midwest, Athlone, Ireland
| | - Aoife Lane
- Department of Sport and Health Sciences, Technological University of the Shannon: Midlands Midwest, Athlone, Ireland
- SHE Research Group, Technological University of the Shannon: Midlands Midwest, Athlone, Ireland
| | - Kris Beattie
- Department of Sport and Health Sciences, Technological University of the Shannon: Midlands Midwest, Athlone, Ireland
- SHE Research Group, Technological University of the Shannon: Midlands Midwest, Athlone, Ireland
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7
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Dello Iacono A, Watson K, Jukic I. The Autoregulation Rest-Redistribution Training Method Mitigates Sex Differences in Neuromuscular and Perceived Fatigue During Resistance Training. Int J Sports Physiol Perform 2024:1-11. [PMID: 38772547 DOI: 10.1123/ijspp.2023-0357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 03/22/2024] [Accepted: 03/22/2024] [Indexed: 05/23/2024]
Abstract
PURPOSE To examine the sex differences in performance and perceived fatigue during resistance training prescribed using traditional (TRA) and autoregulation rest-redistribution training (ARRT) approaches. METHODS Twelve resistance-trained men and 12 women completed 2 sessions including the bench-press exercise matched for load (75% of 1-repetition maximum), volume (24 repetitions), and total rest (240 s). Sessions were performed in a counterbalanced randomized design with TRA consisting of 3 sets of 8 repetitions with 120-second interset rest and ARRT employing a personalized combination of clusters, repetitions per cluster, and between-clusters rest regulated with a 20% velocity-loss threshold. The effects of TRA and ARRT on velocity loss, unilateral isometric peak force, and rating of fatigue (ROF) were compared between sexes. RESULTS The velocity loss was generally lower during ARRT compared with TRA (-0.47% [0.11%]), with velocity loss being mitigated by ARRT to a greater extent among males compared with females (-0.37% [0.15%]). A smaller unilateral isometric peak force decline was observed after ARRT than TRA among males compared with females (-38.4 [8.4] N). Lower ROF after ARRT than TRA was found among males compared to females (-1.97 [0.55] AU). Additionally, males reported greater ROF than females across both conditions (1.92 [0.53] AU), and ARRT resulted in lower ROF than TRA overall (-0.83 [0.39] AU). CONCLUSIONS The ARRT approach resulted in decreased velocity loss, peak force impairment, and ROF compared with TRA in both sexes. However, male subjects exhibited more pronounced acute within-session benefits from the ARRT method.
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Affiliation(s)
- Antonio Dello Iacono
- Sport and Physical Activity Research Institute, School of Health and Life Sciences, University of the West of Scotland, Hamilton, United Kingdom
| | - Kevin Watson
- Department of Strength and Conditioning, Glasgow School of Sport, Glasgow, United Kingdom
| | - Ivan Jukic
- Sport Performance Research Institute New Zealand (SPRINZ), Auckland University of Technology, Auckland, New Zealand
- Division of Sport and Exercise Sciences, School of Applied Sciences, Abertay University, Dundee, United Kingdom
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Fraile-Martinez O, García-Montero C, Fraile-Martinez M, Pekarek L, Barrena-Blázquez S, López-González L, Álvarez-Mon MÁ, Pekarek T, Casanova C, Álvarez-Mon M, Diaz R, Saez MA, Ortega MA. A comprehensive study of the academic benefits and practical recommendations to include resistance training programs in institutional education. Front Psychol 2024; 15:1387162. [PMID: 38817830 PMCID: PMC11139023 DOI: 10.3389/fpsyg.2024.1387162] [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: 02/16/2024] [Accepted: 04/16/2024] [Indexed: 06/01/2024] Open
Abstract
The connection between physical activity and cognitive function has become a focus of attention in educational research in recent years. Regular exercise has been shown to have significant positive effects on physical health, but it also appears to have a significant impact on cognitive function and academic performance. Of all the exercise modalities, resistance training has drawn interest for its ability to improve cerebral abilities in addition to physical well-being. However, there is limited available knowledge exploring the relationship between resistance training regimens and academic performance. This narrative review aims to investigate the underlying mechanisms linking resistance training to academic performance. Firstly, we will examine the biological mechanisms and psychosocial links that potentially connect resistance training to academic performance to find and describe the different mechanisms by which resistance training improves academic performance. In the next part of the work, we delve into the existing observational and intervention studies that have explored the relationship between resistance training and academic performance. Lastly, we provide practical recommendations for including resistance training in institutional education settings, emphasizing the need of dispelling myths and addressing barriers to increase participation as well as the relevance of considering key training variables and adaptation of protocols to developmental stages, always guided by a properly trained professional. Overall, the available evidence supports that resistance training provides potential benefits to the academic performance of youth students with many biological and psychosocial factors that explain this relationship. However, most of the studies are observational, and broader interventional studies are needed to understand and maximize the benefits of this type of physical exercise.
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Affiliation(s)
- Oscar Fraile-Martinez
- Department of Medicine and Medical Specialties (CIBEREHD), Faculty of Medicine and Health Sciences, University of Alcalá, Alcala de Henares, Spain
- Ramón y Cajal Institute of Sanitary Research (IRYCIS), Madrid, Spain
| | - Cielo García-Montero
- Department of Medicine and Medical Specialties (CIBEREHD), Faculty of Medicine and Health Sciences, University of Alcalá, Alcala de Henares, Spain
- Ramón y Cajal Institute of Sanitary Research (IRYCIS), Madrid, Spain
| | - Marcos Fraile-Martinez
- Department of Medicine and Medical Specialties (CIBEREHD), Faculty of Medicine and Health Sciences, University of Alcalá, Alcala de Henares, Spain
- Ramón y Cajal Institute of Sanitary Research (IRYCIS), Madrid, Spain
| | - Leonel Pekarek
- Department of Medicine and Medical Specialties (CIBEREHD), Faculty of Medicine and Health Sciences, University of Alcalá, Alcala de Henares, Spain
- Ramón y Cajal Institute of Sanitary Research (IRYCIS), Madrid, Spain
| | - Silvestra Barrena-Blázquez
- Ramón y Cajal Institute of Sanitary Research (IRYCIS), Madrid, Spain
- Department of Nursing and Physiotherapy, Faculty of Medicine and Health Sciences, University of Alcalá, Alcala de Henares, Spain
- Surgery Service, University Hospital Principe de Asturias, Alcala de Henares, Spain
| | - Laura López-González
- Ramón y Cajal Institute of Sanitary Research (IRYCIS), Madrid, Spain
- Department of Surgery, Medical and Social Sciences, Faculty of Medicine and Health Sciences, University of Alcalá, Alcala de Henares, Spain
| | - Miguel Ángel Álvarez-Mon
- Department of Medicine and Medical Specialties (CIBEREHD), Faculty of Medicine and Health Sciences, University of Alcalá, Alcala de Henares, Spain
- Ramón y Cajal Institute of Sanitary Research (IRYCIS), Madrid, Spain
| | - Tatiana Pekarek
- Department of Medicine and Medical Specialties (CIBEREHD), Faculty of Medicine and Health Sciences, University of Alcalá, Alcala de Henares, Spain
- Ramón y Cajal Institute of Sanitary Research (IRYCIS), Madrid, Spain
| | - Carlos Casanova
- Department of Medicine and Medical Specialties (CIBEREHD), Faculty of Medicine and Health Sciences, University of Alcalá, Alcala de Henares, Spain
- Ramón y Cajal Institute of Sanitary Research (IRYCIS), Madrid, Spain
| | - Melchor Álvarez-Mon
- Department of Medicine and Medical Specialties (CIBEREHD), Faculty of Medicine and Health Sciences, University of Alcalá, Alcala de Henares, Spain
- Ramón y Cajal Institute of Sanitary Research (IRYCIS), Madrid, Spain
- Immune System Diseases-Rheumatology Service, University Hospital Principe de Asturias, Alcala de Henares, Spain
| | - Raul Diaz
- Ramón y Cajal Institute of Sanitary Research (IRYCIS), Madrid, Spain
- Surgery Service, University Hospital Principe de Asturias, Alcala de Henares, Spain
- Department of Surgery, Medical and Social Sciences, Faculty of Medicine and Health Sciences, University of Alcalá, Alcala de Henares, Spain
| | - Miguel A. Saez
- Department of Medicine and Medical Specialties (CIBEREHD), Faculty of Medicine and Health Sciences, University of Alcalá, Alcala de Henares, Spain
- Ramón y Cajal Institute of Sanitary Research (IRYCIS), Madrid, Spain
- Pathological Anatomy Service, Central University Hospital of Defence-UAH, Madrid, Spain
| | - Miguel A. Ortega
- Department of Medicine and Medical Specialties (CIBEREHD), Faculty of Medicine and Health Sciences, University of Alcalá, Alcala de Henares, Spain
- Ramón y Cajal Institute of Sanitary Research (IRYCIS), Madrid, Spain
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Francisco R, Jesus F, Nunes CL, Santos P, Alvim M, Campa F, Schoeller DA, Lukaski H, Mendonca GV, Sardinha LFCB, Silva AMLDA. H2OAthletes study protocol: effects of hydration changes on neuromuscular function in athletes. Br J Nutr 2024; 131:1579-1590. [PMID: 38299306 DOI: 10.1017/s0007114524000308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2024]
Abstract
We aim to understand the effects of hydration changes on athletes' neuromuscular performance, on body water compartments, fat-free mass hydration and hydration biomarkers and to test the effects of the intervention on the response of acute dehydration in the hydration indexes. The H2OAthletes study (clinicaltrials.gov ID: NCT05380089) is a randomised controlled trial in thirty-eight national/international athletes of both sexes with low total water intake (WI) (i.e. < 35·0 ml/kg/d). In the intervention, participants will be randomly assigned to the control (CG, n 19) or experimental group (EG, n 19). During the 4-day intervention, WI will be maintained in the CG and increased in the EG (i.e. > 45·0 ml/kg/d). Exercise-induced dehydration protocols with thermal stress will be performed before and after the intervention. Neuromuscular performance (knee extension/flexion with electromyography and handgrip), hydration indexes (serum, urine and saliva osmolality), body water compartments and water flux (dilution techniques, body composition (four-compartment model) and biochemical parameters (vasopressin and Na) will be evaluated. This trial will provide novel evidence about the effects of hydration changes on neuromuscular function and hydration status in athletes with low WI, providing useful information for athletes and sports-related professionals aiming to improve athletic performance.
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Affiliation(s)
- Rúben Francisco
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade de Lisboa, 1499-002 Cruz-Quebrada, Lisbon, Portugal
| | - Filipe Jesus
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade de Lisboa, 1499-002 Cruz-Quebrada, Lisbon, Portugal
| | - Catarina L Nunes
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade de Lisboa, 1499-002 Cruz-Quebrada, Lisbon, Portugal
| | - Paulo Santos
- Neuromuscular Research Lab, CIPER, Faculdade Motricidade Humana, Universidade de Lisboa, Lisbon, Portugal
| | - Marta Alvim
- National Institute of Health Doutor Ricardo Jorge, Lisbon, Portugal
| | - Francesco Campa
- Department of Biomedical Sciences, University of Padua, Padua, Italy
| | - Dale A Schoeller
- Interdepartmental Graduate Program in Nutritional Sciences, University of Wisconsin-Madison, Madison, WI, USA
| | - Henry Lukaski
- Department of Kinesiology and Public Health Education, Hyslop Sports Center, University of North Dakota, Grand Forks, ND, USA
| | - Goncalo V Mendonca
- Neuromuscular Research Lab, CIPER, Faculdade Motricidade Humana, Universidade de Lisboa, Lisbon, Portugal
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10
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Gordon RA, Sokoloski ML, Zumbro EL, Irvine CJ, Oldham M, Morgan N. Skeletal muscle fitness and physiology as determinants of firefighter performance and safety: a narrative review. ERGONOMICS 2024:1-11. [PMID: 38742476 DOI: 10.1080/00140139.2024.2352719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Accepted: 05/03/2024] [Indexed: 05/16/2024]
Abstract
Firefighters routinely perform tasks that are reliant on their muscular fitness, which includes muscular strength, power and endurance. Separately, firefighters can present with unique skeletal muscle physiology characteristics due to the strenuous nature of this occupation. This review aims to summarise muscular fitness and physiology as determinants of a firefighter's ability to perform occupation-specific tasks, identify the relevance of both muscular fitness and physiology to a firefighter's risk for sustaining a work-related injury, and address the contributions of muscular fitness and physiology on a firefighter's ability to recover from tasks and their readiness for performing subsequent or future tasks. The presented evidence reveals muscular fitness can determine a firefighter's capacity to perform their job effectively, while also influencing risk for occupational injury. Collectively, this review indicates exercise training emphasising improvements in muscular strength, power, and endurance (i.e. resistance training) should be encouraged in this occupation.
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Affiliation(s)
- Ryan A Gordon
- Department of Kinesiology, Missouri State University, Springfield, MO, USA
| | | | - Emily L Zumbro
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Chris J Irvine
- Department of Health and Human Performance, Rocky Mountain University, Billings, MT, USA
| | - Michael Oldham
- Department of Health and Human Performance, Texas A&M University-Commerce, Commerce, TX, USA
| | - Natalie Morgan
- Department of Biology, Drury University, Springfield, MO, USA
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11
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Lombard WP, Lambert MI. Physical fitness metrics and their relationship to locomotor activity profiles among female international field hockey players across an Olympic cycle. J Sci Med Sport 2024; 27:341-353. [PMID: 38431456 DOI: 10.1016/j.jsams.2024.02.003] [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: 09/30/2023] [Revised: 01/28/2024] [Accepted: 02/07/2024] [Indexed: 03/05/2024]
Abstract
OBJECTIVES The study explored the correlations between physical fitness metrics and match locomotor activity profiles. Furthermore exploring the transformations of both fitness tests as well as match locomotor activities over an Olympic cycle. DESIGN Observational descriptive study. METHODS Fitness testing (n = 24) and match locomotor activity (n = 102) profiles were collected. A Pearson's product-moment correlation and 95 % confidence intervals were calculated to determine relationships between metrics for each year. A mixed-effects model was used for repeated measures to identify differences in the physical fitness tests and match locomotor activity profiles between years. RESULTS The YoYo intermittent reocvery testest level 1 changed significantly (p < 0.0001) and accounted for 29 % of the variance in average speed (p < 0.001, rrm (59) = 0.54) Upper and lower body muscular strength, also improved, evidenced by the 3RM bench press (p < 0.0001), and a 28 % (2017-2019) increase in 3RM squat (p < 0.0001). Also pull-ups increased from 4.2 ± 2.8 pull-ups (2017) to 10.0 ± 3.1 pull-ups (2020) (p < 0.0001) and. countermovement jump height increased over the study duration (p < 0.0001). Match total distances remained unchanged, while average speed increased significantly (p < 0.0001). High-speed running distance (p < 0.0003) and sprint counts (p < 0.0001), showed significant improvements over the study period. CONCLUSIONS The study underscores noteworthy improvements in physical attributes and performance metrics over an Olympic cycle. Contributing valuable insights for enhancing athletic performance in hockey players competing in the Olympics.
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Affiliation(s)
- Wayne P Lombard
- Health through Physical Activity, Lifestyle and Sport Research Centre (HPALS), Department of Human Biology, Faculty of Health Sciences, University of Cape Town, South Africa; APA Training Systems Pty Ltd, South Africa; Lakshyan Academy of Sports, India.
| | - Michael I Lambert
- Health through Physical Activity, Lifestyle and Sport Research Centre (HPALS), Department of Human Biology, Faculty of Health Sciences, University of Cape Town, South Africa; Human Kinetics and Ergonomics, Rhodes University, South Africa.
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12
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Staśkiewicz-Bartecka W, Kardas M, Zydek G, Zając A, Chycki J. Changes in Body Composition and Nutritional Periodization during the Training Macrocycle in Football-A Narrative Review. Nutrients 2024; 16:1332. [PMID: 38732581 PMCID: PMC11085159 DOI: 10.3390/nu16091332] [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: 04/05/2024] [Revised: 04/23/2024] [Accepted: 04/27/2024] [Indexed: 05/13/2024] Open
Abstract
Nutrition periodization in football training is an important determinant of adaptation to cyclic training loads. Personalizing an athlete's diet is crucial to ensure optimal performance and body composition, depending on the phase of training. The purpose of this review is to answer the question of how the body composition of football players changes over the training macrocycle and how dietary recommendations should be tailored to specific training periods. The review of scientific evidence was conducted based on the available literature, typing in phrases related to training and nutrition periodization using the PubMed and Google Scholar database methodology tools. A literature search resulted in the selection of 346 sources directly related to the topic of the study, and then those with the highest scientific value were selected. There is a need to adjust energy and nutrient intake according to the different training phases in a football player's preparation cycle. During the preparatory phase, it is recommended to increase protein and energy intake to support anabolic processes and muscle mass development. During the competitive period, due to the intensity of matches and training, the importance of carbohydrates for glycogen replenishment and recovery is emphasized. The transition phase requires the regulation of caloric intake to prevent adverse changes in body composition. Hydration has been identified as a key element in each phase of training. Cooperation between coaches, nutritionists, and players is essential to optimize sports performance and rapid recovery, and the authors recommend continuous adaptation and nutritional optimization as an integral part of football training.
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Affiliation(s)
- Wiktoria Staśkiewicz-Bartecka
- Department of Food Technology and Quality Evaluation, Department of Dietetics, Faculty of Public Health in Bytom, Medical University of Silesia in Katowice, ul. Jordana 19, 41-808 Zabrze, Poland;
| | - Marek Kardas
- Department of Food Technology and Quality Evaluation, Department of Dietetics, Faculty of Public Health in Bytom, Medical University of Silesia in Katowice, ul. Jordana 19, 41-808 Zabrze, Poland;
| | - Grzegorz Zydek
- Department of Sport Nutrition, Jerzy Kukuczka Academy of Physical Education in Katowice, ul. Mikołowska 72A, 40-065 Katowice, Poland;
| | - Adam Zając
- Department of Sports Training, Institute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education in Katowice, ul. Mikołowska 72A, 40-065 Katowice, Poland; (A.Z.); (J.C.)
| | - Jakub Chycki
- Department of Sports Training, Institute of Sport Sciences, Jerzy Kukuczka Academy of Physical Education in Katowice, ul. Mikołowska 72A, 40-065 Katowice, Poland; (A.Z.); (J.C.)
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13
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Perret C, Käch M, Hertig-Godeschalk A, Ammann F. Strength and power adaptations of the upper body following 20 training sessions on an eccentric arm-crank ergometer. Eur J Appl Physiol 2024:10.1007/s00421-024-05486-3. [PMID: 38656379 DOI: 10.1007/s00421-024-05486-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Accepted: 04/04/2024] [Indexed: 04/26/2024]
Abstract
PURPOSE Eccentric strength training is an innovative and promising approach to improve exercise performance. However, most eccentric training studies in the past were performed with a focus on the lower extremities. The present study aimed to test the feasibility and effects on strength and power adaptations of a structured upper-body eccentric training program. METHODS Fourteen (median age (Q1-Q3) 29 years (27-32); 9 females, 5 males) healthy, regularly exercising individuals performed 20 progressive training sessions (2-3 sessions/week at 20-50% peak power for 8-14 min) on a symmetric eccentric arm-crank ergometer. Before and after the intervention, anaerobic peak power (PP) and maximal concentric aerobic power output (POmax) on an arm-crank ergometer as well as the one repetition maximum (1RM) for bench press were determined as main outcome parameters. A p-value ≤ 0.05 was considered statistically significant. RESULTS Significant improvements in PP (+ 4% (1-8), p = 0.007), POmax (+ 6% (0-8); p = 0.01), and 1RM (+ 12% (10-17); p < 0.001) were found. Exercise intensity was relatively low at 64% (55-70) of maximum heart rate. CONCLUSIONS Twenty progressive training sessions on a symmetric arm-crank ergometer are effective in inducing significant aerobic and anaerobic performance and strength improvements in the upper body. This intervention is safe and feasible, and can be performed at relatively low cardiovascular intensities. Therefore, this training method offers an interesting approach from elite sports to rehabilitation.
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Affiliation(s)
- Claudio Perret
- Swiss Paraplegic Research, Guido A. Zaech-Strasse 4, 6207, Nottwil, Switzerland
- Faculty of Health Sciences and Medicine, University of Lucerne, Lucerne, Switzerland
| | - Matheo Käch
- Institute of Human Movement Sciences and Sports, ETH Zurich, Zurich, Switzerland
- Institute of Sports Medicine, Swiss Paraplegic Centre, Nottwil, Switzerland
| | | | - Fabian Ammann
- Institute of Sports Medicine, Swiss Paraplegic Centre, Nottwil, Switzerland
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14
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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 2024:10.1007/s40279-024-02006-3. [PMID: 38652410 DOI: 10.1007/s40279-024-02006-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [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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15
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Tesarz J, Lange H, Kirchner M, Görlach A, Eich W, Friederich HC. Efficacy of supervised immersive virtual reality-based training for the treatment of chronic fatigue in post-COVID syndrome: study protocol for a double-blind randomized controlled trial (IFATICO Trial). Trials 2024; 25:232. [PMID: 38570805 PMCID: PMC10993519 DOI: 10.1186/s13063-024-08032-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 03/04/2024] [Indexed: 04/05/2024] Open
Abstract
BACKGROUND The treatment of persistent fatigue after COVID-19 infection is complex. On the one hand, it involves maintaining a sufficient level of physical and mental activity to counteract possible degenerative processes of the body and nervous system. On the other hand, physical and mental activities can also lead to worsening of symptoms. Therefore, the challenge in treating Post-COVID fatigue is to stimulate the body and central nervous system in a way that stimulates growth and improvement, but does not overtax individual physical and mental limits. Special training programs try to take these characteristics into account, but often reach their limits. A promising approach is offered by new fitness technologies based on immersive virtual realities that stimulate both body and brain while minimizing physical and psychological stress. The aim of this study is to investigate the efficacy of supervised immersive Virtual Reality (VR)-based activity training compared to conventional activity training for patients with Post-COVID-associated fatigue. METHODS In a single centre, individually randomised, prospective, double-blind two-arm exploratory superiority trial with parallel group design, N = 100 patients with persistent fatigue after COVID-19 infection will be recruited. The intervention includes a supervised immersive neuromuscular training (12 sessions of 30 min over 6 weeks) based on a novel VR-exercise device. We will systematically compare the effects of this intervention on Post-COVID-associated fatigue with a supervised conventional activation program of comparable scope without an immersive environment. The primary outcome is the difference between groups in absolute change in the mean fatigue symptom severity measured on the Fatigue Severity Scale (FSS) from baseline to posttreatment assessment. Posttreatment assessment in both groups will be conducted by blinded outcome assessors. At three and six months afterwards, patients are sent self-report questionnaires for follow up. The main analysis will be based on the intention-to-treat principle. DISCUSSION To the best of our knowledge, this is the first exploratory study on a supervised immersive neuromuscular training for the treatment of persistent fatigue after COVID-19 infection. TRIAL REGISTRATION German register for clinical studies (ID: DRKS00032059) Prospectively registered on June 16th 2023. URL of trial registration.
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Affiliation(s)
- Jonas Tesarz
- Department of General Internal Medicine and Psychosomatics, Heidelberg University, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany, Germany.
- DZPG (German Centre for Mental Health), Partner Site Heidelberg/ Mannheim/ Ulm, Heidelberg, Germany.
| | - Hannah Lange
- Department of General Internal Medicine and Psychosomatics, Heidelberg University, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany, Germany
| | - Marietta Kirchner
- Institute of Medical Biometry, University of Heidelberg, Heidelberg, Germany
| | - Axel Görlach
- Department of General Internal Medicine and Psychosomatics, Heidelberg University, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany, Germany
| | - Wolfgang Eich
- Department of General Internal Medicine and Psychosomatics, Heidelberg University, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany, Germany
| | - Hans-Christoph Friederich
- Department of General Internal Medicine and Psychosomatics, Heidelberg University, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany, Germany
- DZPG (German Centre for Mental Health), Partner Site Heidelberg/ Mannheim/ Ulm, Heidelberg, Germany
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16
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Zhou EFM, Wong AYL, Zheng YP, Lam KHS, Fu SN. Reliability of Ultrasound Shear Wave Elastography for Evaluating Psoas Major and Quadratus Lumborum Stiffness: Gender and Physical Activity Effects. ULTRASOUND IN MEDICINE & BIOLOGY 2024; 50:564-570. [PMID: 38272743 DOI: 10.1016/j.ultrasmedbio.2023.12.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 12/04/2023] [Accepted: 12/22/2023] [Indexed: 01/27/2024]
Abstract
OBJECTIVE We aimed to assess the reliability of quantifying psoas major (PM) and quadratus lumborum (QL) stiffness with ultrasound shear wave elastography (SWE), and to explore the effects of gender and physical activity on muscle stiffness. METHODS Fifty-two healthy participants (18-32 y) were recruited. To determine reliability, 29 of them underwent repeated SWE measurements of PM and QL stiffness by an operator on the same day. The intra-class correlation coefficients (ICC3,1), standard error of measurement (SEM) and minimal detectable change with 95% confidence interval (MDC95) were calculated. The rest participants underwent a single measurement. Two-way MANCOVA was conducted for the effects of gender and physical activity on muscle stiffness. RESULTS The observed reliability for PM (ICC3,1 = 0.89-0.92) and QL (ICC3,1 = 0.79-0.82) were good-to-excellent and good, respectively. The SEM (kPa) was 0.79-1.03 and 1.23-1.28, and the MDC95 (kPa) was 2.20-2.85 and 3.41-3.56 for PM and QL, respectively. After BMI adjustment, both gender (PM: F = 10.15, p = 0.003; QL: F = 18.07, p < 0.001) and activity level (PM: F = 5.90, p = 0.005; QL: F = 6.33, p = 0.004) influenced muscle stiffness. The female and inactive groups exhibited higher stiffness in both muscles. CONCLUSION SWE is reliable for quantifying the stiffness of PM and QL. Female and physical inactivity may elevate PM and QL stiffness, underscoring the importance of accounting for these factors in muscle stiffness investigations. Larger prospective studies are needed to further elucidate their effects.
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Affiliation(s)
- Emma Feng Ming Zhou
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong, China
| | - Arnold Yu Lok Wong
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong, China
| | - Yong Ping Zheng
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong, China; Research Institute for Smart Ageing, The Hong Kong Polytechnic University, Hong Kong, China
| | - King Hei Stanley Lam
- The Hong Kong Institute of Musculoskeletal Medicine, Hong Kong, Hong Kong, China; Department of Family Medicine, The Chinese University of Hong Kong, Hong Kong, China; Department of Family Medicine, The University of Hong Kong, Hong Kong, China.
| | - Siu Ngor Fu
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong, China
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17
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Ben Waer F, Alexe DI, Lahiani M, Sanchez-Gomez R, Chaari F, Alexe CI, Tohanean DI, Rebai H, Iconomescu TM, Talaghir LG, Sahli S. Pilates versus Zumba training effects on postural control under conflicting sensory conditions in postmenopausal women. Exp Gerontol 2024; 188:112383. [PMID: 38377666 DOI: 10.1016/j.exger.2024.112383] [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: 12/29/2023] [Revised: 02/13/2024] [Accepted: 02/17/2024] [Indexed: 02/22/2024]
Abstract
The current study aimed to compare the effects of Pilates versus Zumba training on postural performance in middle-aged postmenopausal women. Fifty-seven eligible women, aged between 50 and 60 years, were randomized into three groups: Zumba (ZG) group, Pilates (PG) group or control (CG) group. Postural control was assessed using a force platform under 4 sensory manipulation conditions: on firm and foam surfaces with eyes opened (EO) and closed (EC). Our results showed more marked adaptations in favor of ZG concerning postural performance compared to PG. For the PG, postural control was significantly improved only in simple postural conditions on the firm surface with EO (p < 0.1) and EC (p < 0.05) conditions. However, postural control of the ZG significantly improved in both the simple and complex postural conditions, even under conflicting sensory situations (firm surface/EO (p < 0.001; 95 % CI: [1.34, 4.46]), EC (p < 0.001; 95 % CI: [2.13, 5.24])); foam surface/EO (p < 0.01; 95 % CI: [0.70, 8.57]), EC (p < 0.01; 95 % CI: [0.65, 8.52])). In conclusion, Zumba training seems to be more effective and a better strategy to promote postural control in daily living activities and autonomy in postmenopausal women than Pilates training. These findings are useful for public health practitioners in designing physical interventions for balance disorders.
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Affiliation(s)
- Fatma Ben Waer
- Research Laboratory Education, Motricité, Sport et Santé, LR19JS01, High Institute of Sport and Physical Education of Sfax, University of Sfax, Tunisia
| | - Dan Iulian Alexe
- Department of Physical and Occupational Therapy, Faculty of Movement, Sports and Health, Sciences, "Vasile Alecsandri" University of Bacău, 600115 Bacău, Romania.
| | - Mariam Lahiani
- Research Laboratory Education, Motricité, Sport et Santé, LR19JS01, High Institute of Sport and Physical Education of Sfax, University of Sfax, Tunisia
| | - Rubén Sanchez-Gomez
- Nursing Department, Universidad Complutense de Madrid, Instituto de Investigacion Sanitaria, (IDISSC) Hospital Clinico San Carlos, 28040 Madrid, Spain
| | - Fatma Chaari
- Research Laboratory Education, Motricité, Sport et Santé, LR19JS01, High Institute of Sport and Physical Education of Sfax, University of Sfax, Tunisia
| | - Cristina Ioana Alexe
- Department of Physical Education and Sports Performance, Faculty of Movement, Sports and Health Sciences,"Vasile Alecsandri", University of Bacău, 600115 Bacău, Romania
| | - Dragos Ioan Tohanean
- Department of Motric Performance, "Transilvania" University of Brașov, 600115 Brașov, Romania
| | - Haithem Rebai
- Tunisian Research Laboratory 'Sports Performance Optimization', National Center of Medicine and Science in Sports (CNMSS), (CNMSS-LR09SEP01), Tunis, Tunisia
| | | | - Laurențiu Gabriel Talaghir
- Individual sports and physical therapy Department, "Dunarea de Jos" University of Galati str. Domnesca, nr, 47, Galati 800008, Romania
| | - Sonia Sahli
- Research Laboratory Education, Motricité, Sport et Santé, LR19JS01, High Institute of Sport and Physical Education of Sfax, University of Sfax, Tunisia
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Lee MC, Hsu YJ, Ho CS, Tsai YS, Chen CC, Huang CC. Supplementation with Lactiplantibacillus brevis GKEX Combined with Resistance Exercise Training Improves Muscle Mass, Strength Performance, and Body Fat Condition in Healthy Humans. Foods 2024; 13:1030. [PMID: 38611334 PMCID: PMC11011920 DOI: 10.3390/foods13071030] [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: 03/08/2024] [Revised: 03/25/2024] [Accepted: 03/26/2024] [Indexed: 04/14/2024] Open
Abstract
In addition to maintaining good exercise and dietary habits, recent studies have shown that probiotics may have potential benefits for muscle mass and strength. It is worth noting that the effects may vary depending on the specific strains used. To date, no studies have analyzed the effects of Lactiplantibacillus brevis in this context. Here, we combine the L. brevis strain GKEX with resistance training to further understand its effects on muscle mass, thickness, performance, and fat loss. In a six-week intervention for a double-blind randomized trial, 52 healthy subjects were divided into two groups (10 male and 16 female participants in each group): a placebo group (two capsules/day, containing 0 CFU of GKEX per capsule) and a GKEX group (two capsules/day, containing 1 × 1010 CFU of GKEX per capsule). Before the intervention, no differences were observed between the two groups in any of the tests (body composition, muscle thickness, exercise performance, and blood parameters). However, supplementation with GKEX significantly improved muscle mass and thickness, as well as grip strength, muscle strength, and explosive performance, when compared to the associated parameters before the intervention. Additionally, GKEX supplementation promoted a reduction in the body fat percentage (p < 0.05). Through analysis of the change amount, we observed that GKEX supplementation yielded significantly improved benefits when compared to the placebo group (p < 0.05). In summary, our findings support the notion that a six-week resistance exercise training program combined with L. brevis GKEX supplementation has superior additive effects that enhance muscle mass and strength performance, while also reducing body fat percentage. This intervention can promote muscle gain and fat loss.
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Affiliation(s)
- Mon-Chien Lee
- Graduate Institute of Sports Science, National Taiwan Sport University, Taoyuan 333325, Taiwan; (M.-C.L.); (Y.-J.H.); (C.-S.H.)
- Center for General Education, Taipei Medical University, Taipei 110301, Taiwan
| | - Yi-Ju Hsu
- Graduate Institute of Sports Science, National Taiwan Sport University, Taoyuan 333325, Taiwan; (M.-C.L.); (Y.-J.H.); (C.-S.H.)
| | - Chin-Shan Ho
- Graduate Institute of Sports Science, National Taiwan Sport University, Taoyuan 333325, Taiwan; (M.-C.L.); (Y.-J.H.); (C.-S.H.)
| | - You-Shan Tsai
- Biotech Research Institute, Grape King Bio Ltd., Taoyuan 325002, Taiwan; (Y.-S.T.); (C.-C.C.)
| | - Chin-Chu Chen
- Biotech Research Institute, Grape King Bio Ltd., Taoyuan 325002, Taiwan; (Y.-S.T.); (C.-C.C.)
- Institute of Food Science and Technology, National Taiwan University, Taipei 106319, Taiwan
| | - Chi-Chang Huang
- Graduate Institute of Sports Science, National Taiwan Sport University, Taoyuan 333325, Taiwan; (M.-C.L.); (Y.-J.H.); (C.-S.H.)
- Tajen University, Pingtung 907101, Taiwan
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19
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Getirana-Mota M, Aidar FJ, Ribeiro Neto F, Santos TP, Almeida-Neto PFD, Cabral BGDAT, Vieira-Souza LM, D. Garrido N, Reis VM, Souza RF. Comparison of Neuromuscular Fatigue in Powerlifting Paralympics in Different Training Methods. Sports Med Int Open 2024; 8:a22077922. [PMID: 38812958 PMCID: PMC11135401 DOI: 10.1055/a-2207-7922] [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: 07/16/2023] [Accepted: 10/31/2023] [Indexed: 05/31/2024] Open
Abstract
Mean propulsive velocity (MPV) has been associated with neuromuscular fatigue; however, its suitability for strength training in Paralympic powerlifting (PP) remains uncertain. The objective of this work was to evaluate the MPV in two training methods (traditional-TRAD and eccentric-ECC). Eleven PP athletes were evaluated pre, during the intervention and post intervention at a load of 80% of the 1RM for TRAD and 110%-80% of 1 RM for ECC. The results demonstrated that there was no significant neuromuscular fatigue for the TRAD (~5% performance loss), as well as no significant decline in MPV during the intervention. For the ECC, there is a significant reduction in MPV before and after training (~12% loss of performance). A difference between TRAD and ECC after the intervention was also identified (0.87 m/s±0.22, 95% CI 0.72-1.02 vs. 0.72±0.20, 95% CI 0.59-0.86 p=0.042, F(3.30)=10.190, η2p=0.505 - very high effect). During the intervention for ECC, no significant decline in MPV was observed. The results of this study suggest that the mechanical indices of MPV do not seem to be effective indicators of neuromuscular fatigue in the sample studied or in the context of this specific training regime, being more indicated as a control of training volume.
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Affiliation(s)
- Márcio Getirana-Mota
- Graduate Program of Physical Education, Federal University of Sergipe,
Sao Cristovao, Brazil
- Group of Studies and Research of Performance, Sport, Health and
Paralympic Sports - GPEPS, the Federal University of Sergipe, São Cristóvão,
Brazil
- Graduate Program of Physiological Science, Federal University of
Sergipe, São Cristóvão, Brazil
| | - Felipe J. Aidar
- Graduate Program of Physical Education, Federal University of Sergipe,
Sao Cristovao, Brazil
- Group of Studies and Research of Performance, Sport, Health and
Paralympic Sports - GPEPS, the Federal University of Sergipe, São Cristóvão,
Brazil
- Graduate Program of Physiological Science, Federal University of
Sergipe, São Cristóvão, Brazil
| | | | - Taísa Pereira Santos
- Graduate Program of Physical Education, Federal University of Sergipe,
Sao Cristovao, Brazil
- Group of Studies and Research of Performance, Sport, Health and
Paralympic Sports - GPEPS, the Federal University of Sergipe, São Cristóvão,
Brazil
| | | | | | - Lucio Marques Vieira-Souza
- Graduate Program of Physical Education, Federal University of Sergipe,
Sao Cristovao, Brazil
- Physical Education Course, State University of Minas Gerais-UEMG,
Passos, Brazil
| | - Nuno D. Garrido
- Research Center in Sports Sciences, Health Sciences and Human
Development (CIDESD), University of Trás-os-Montes e Alto Douro, Vila Real,
Portugal
| | - Victor M. Reis
- Research Center in Sports Sciences, Health Sciences and Human
Development (CIDESD), University of Trás-os-Montes e Alto Douro, Vila Real,
Portugal
| | - Raphael Fabricio Souza
- Graduate Program of Physical Education, Federal University of Sergipe,
Sao Cristovao, Brazil
- Group of Studies and Research of Performance, Sport, Health and
Paralympic Sports - GPEPS, the Federal University of Sergipe, São Cristóvão,
Brazil
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20
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Rogerson D, Nolan D, Korakakis PA, Immonen V, Wolf M, Bell L. Deloading Practices in Strength and Physique Sports: A Cross-sectional Survey. SPORTS MEDICINE - OPEN 2024; 10:26. [PMID: 38499934 PMCID: PMC10948666 DOI: 10.1186/s40798-024-00691-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 02/27/2024] [Indexed: 03/20/2024]
Abstract
BACKGROUND This study explored the deloading practices of competitive strength and physique athletes. A 55-item anonymised web-based survey was distributed to a convenience-based, cross-sectional sample of competitive strength and physique athletes (n = 246; males = 181 [73.6%], females = 65 [26.4%]; age = 29.5 ± 8.6 years) who had 8.2 ± 6.2 years of resistance training and 3.8 ± 3.1 years of competition experience. RESULTS All athletes deloaded within training with energy and fatigue management being the main reasons to do so. The typical duration of a deload was 6.4 ± 1.7 days, integrated into the training programme every 5.6 ± 2.3 weeks. Deloading was undertaken using a proactive, pre-planned strategy (or in combination with an autoregulated approach) and undertaken when performance stalled or during periods of increased muscle soreness or joint aches. Athletes reported that training volume would decrease (through a reduction in both repetitions per set and sets per week), but training frequency would remain unchanged during deloads. Additionally, athletes reported that training intensity (load lifted) would decrease, and effort would be reduced (facilitated through an increase in repetitions in reserve). Athletes would generally maintain the same exercise selection during deloading. For athletes that supplemented deloading with additional recovery modalities (n = 118; 48%), the most reported strategies were massage, static stretching and foam rolling. CONCLUSION Results from this research might assist strength and physique athletes and coaches to plan their deloading. Future research should empirically investigate the findings from this study to further evaluate the potential utility of deloading in strength and physique sports.
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Affiliation(s)
- David Rogerson
- Academy of Sport and Physical Activity, Sheffield Hallam University, Sheffield, S10 2BP, UK.
| | - David Nolan
- School of Health & Human Performance, Dublin City University, Dublin, Ireland
| | | | - Velu Immonen
- Department of Sports and Exercise, Haaga-Helia University of Applied Sciences, Vierumäki, 19120, Finland
| | - Milo Wolf
- Centre for Health, Exercise and Sport Science, Solent University, E Park Terrace, Southampton, SO14 0YN, UK
| | - Lee Bell
- Academy of Sport and Physical Activity, Sheffield Hallam University, Sheffield, S10 2BP, UK
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21
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Saez-Berlanga A, Babiloni-Lopez C, Ferri-Caruana A, Jiménez-Martínez P, García-Ramos A, Flandez J, Gene-Morales J, Colado JC. A new sports garment with elastomeric technology optimizes physiological, mechanical, and psychological acute responses to pushing upper-limb resistance exercises. PeerJ 2024; 12:e17008. [PMID: 38464757 PMCID: PMC10924454 DOI: 10.7717/peerj.17008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 02/05/2024] [Indexed: 03/12/2024] Open
Abstract
This study aimed to compare the mechanical (lifting velocity and maximum number of repetitions), physiological (muscular activation, lactate, heart rate, and blood pressure), and psychological (rating of perceived exertion) responses to upper-body pushing exercises performed wearing a sports elastomeric garment or a placebo garment. Nineteen physically active young adults randomly completed two training sessions that differed only in the sports garment used (elastomeric technology or placebo). In each session, subjects performed one set of seated shoulder presses and another set of push-ups until muscular failure. The dependent variables were measured immediately after finishing the set of each exercise. Compared to the placebo garment, the elastomeric garment allowed participants to obtain greater muscular activation in the pectoralis major (push-ups: p = 0.04, d = 0.49; seated shoulder press: p < 0.01, d = 0.64), triceps brachialis (push-ups, p < 0.01, d = 0.77; seated shoulder press: p < 0.01, d = 0.65), and anterior deltoid (push-ups: p < 0.01, d = 0.72; seated shoulder press: p < 0.01, d = 0.83) muscles. Similarly, participants performed more repetitions (push-ups: p < 0.01; d = 0.94; seated shoulder press: p = 0.03, d = 0.23), with higher movement velocity (all p ≤ 0.04, all d ≥ 0.47), and lower perceived exertion in the first repetition (push-ups: p < 0.01, d = 0.61; seated shoulder press: p = 0.05; d = 0.76) wearing the elastomeric garment compared to placebo. There were no between-garment differences in most cardiovascular variables (all p ≥ 0.10). Higher diastolic blood pressure was only found after the seated shoulder press wearing the elastomeric garment compared to the placebo (p = 0.04; d = 0.49). Finally, significantly lower blood lactate levels were achieved in the push-ups performed wearing the elastomeric garment (p < 0.01; d = 0.91), but no significant differences were observed in the seated shoulder press (p = 0.08). Overall, the findings of this study suggest that elastomeric technology integrated into a sports garment provides an ergogenic effect on mechanical, physiological, and psychological variables during the execution of pushing upper-limb resistance exercises.
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Affiliation(s)
- Angel Saez-Berlanga
- Research Group in Prevention and Health in Exercise and Sport (PHES), Department of Physical Education and Sports, University of Valencia, Valencia, Spain
| | - Carlos Babiloni-Lopez
- Research Group in Prevention and Health in Exercise and Sport (PHES), Department of Physical Education and Sports, University of Valencia, Valencia, Spain
| | - Ana Ferri-Caruana
- Research Group in Prevention and Health in Exercise and Sport (PHES), Department of Physical Education and Sports, University of Valencia, Valencia, Spain
| | - Pablo Jiménez-Martínez
- Research Group in Prevention and Health in Exercise and Sport (PHES), Department of Physical Education and Sports, University of Valencia, Valencia, Spain
- ICEN Institue, Madrid, Spain
| | - Amador García-Ramos
- Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
- Department of Sports Sciences and Physical Conditioning, Faculty of Education, Universidad Católica de la Santísima Concepción, Concepción, Chile
| | - Jorge Flandez
- Institute of Education Sciences, Austral University of Chile, Ciudad de Valdivia, Chile
| | - Javier Gene-Morales
- Research Group in Prevention and Health in Exercise and Sport (PHES), Department of Physical Education and Sports, University of Valencia, Valencia, Spain
| | - Juan C. Colado
- Research Group in Prevention and Health in Exercise and Sport (PHES), Department of Physical Education and Sports, University of Valencia, Valencia, Spain
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22
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Mikkonen RS, Ihalainen JK, Hackney AC, Häkkinen K. Perspectives on Concurrent Strength and Endurance Training in Healthy Adult Females: A Systematic Review. Sports Med 2024; 54:673-696. [PMID: 37948036 PMCID: PMC10978686 DOI: 10.1007/s40279-023-01955-5] [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: 10/16/2023] [Indexed: 11/12/2023]
Abstract
BACKGROUND Both strength and endurance training are included in global exercise recommendations and are the main components of training programs for competitive sports. While an abundance of research has been published regarding concurrent strength and endurance training, only a small portion of this research has been conducted in females or has addressed their unique physiological circumstances (e.g., hormonal profiles related to menstrual cycle phase, menstrual dysfunction, and hormonal contraceptive use), which may influence training responses and adaptations. OBJECTIVE The aim was to complete a systematic review of the scientific literature regarding training adaptations following concurrent strength and endurance training in apparently healthy adult females. METHODS A systematic electronic search for articles was performed in July 2021 and again in December 2022 using PubMed and Medline. This review followed, where applicable, the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. The quality of the included studies was assessed using a modified Downs and Black checklist. Inclusion criteria were (1) fully published peer-reviewed publications; (2) study published in English; (3) participants were healthy normal weight or overweight females of reproductive age (mean age between > 18 and < 50) or presented as a group (n > 5) in studies including both females and males and where female results were reported separately; (4) participants were randomly assigned to intervention groups, when warranted, and the study included measures of maximal strength and endurance performance; and (5) the duration of the intervention was ≥ 8 weeks to ensure a meaningful training duration. RESULTS Fourteen studies met the inclusion criteria (seven combined strength training with running, four with cycling, and three with rowing or cross-country skiing). These studies indicated that concurrent strength and endurance training generally increases parameters associated with strength and endurance performance in female participants, while several other health benefits such as, e.g., improved body composition and blood lipid profile were reported in individual studies. The presence of an "interference effect" in females could not be assessed from the included studies as this was not the focus of any included research and single-mode training groups were not always included alongside concurrent training groups. Importantly, the influence of concurrent training on fast-force production was limited, while the unique circumstances affecting females were not considered/reported in most studies. Overall study quality was low to moderate. CONCLUSION Concurrent strength and endurance training appears to be beneficial in increasing strength and endurance capacity in females; however, multiple research paradigms must be explored to better understand the influence of concurrent training modalities in females. Future research should explore the influence of concurrent strength and endurance training on fast-force production, the possible presence of an "interference effect" in athletic populations, and the influence of unique circumstances, such as hormone profile, on training responses and adaptations.
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Affiliation(s)
- Ritva S Mikkonen
- Sports Technology Unit, Biology of Physical Activity, Faculty of Sport and Health Sciences, University of Jyväskylä, Kidekuja 2, 88610, Vuokatti, Finland.
| | - Johanna K Ihalainen
- Biology of Physical Activity, Faculty of Sport and Health Sciences, University of Jyväskylä, Jyvaskyla, Finland
| | - Anthony C Hackney
- Department of Exercise and Sport Science, and Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Keijo Häkkinen
- Biology of Physical Activity, Faculty of Sport and Health Sciences, University of Jyväskylä, Jyvaskyla, Finland
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23
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Lahiani M, Ben Waer F, Chaari F, Rebai H, Sahli S. Effect of 12-Week-Zumba Training on Postural Balance, Lower Limb Strength, Mood and Quality of Life in Postmenopausal Women. Exp Aging Res 2024; 50:171-189. [PMID: 36726273 DOI: 10.1080/0361073x.2023.2172304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 01/20/2023] [Indexed: 02/03/2023]
Abstract
We aimed to investigate 12-week-Zumba training effects on physical and psychological parameters, and quality of life (QoL) in postmenopausal women. Forty-two postmenopausal women were randomly allocated to a control group or a Zumba group (ZG). Postural balance, lower limb strength, mood level, and QoL were assessed before and after the 12-week-Zumba training. The ZG showed significantly better balance performances under all conditions such as on firm and foam surfaces with opened and closed eyes as well as improvements in limb strength, mood and QoL compared to their baselines. Thereby, 12-week-Zumba training was effective in improving postural balance, limb strength, mood and, QoL in postmenopausal women.
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Affiliation(s)
- Mariam Lahiani
- Research Laboratory: Education, Motricity, Sports and Health, LR19JS01, High Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia
| | - Fatma Ben Waer
- Research Laboratory: Education, Motricity, Sports and Health, LR19JS01, High Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia
| | - Fatma Chaari
- Research Laboratory: Education, Motricity, Sports and Health, LR19JS01, High Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia
| | - Haithem Rebai
- Research Laboratory: Education, Motricity, Sports and Health, LR19JS01, High Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia
| | - Sonia Sahli
- Research Laboratory: Education, Motricity, Sports and Health, LR19JS01, High Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia
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24
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Suchomel TJ, Cantwell CJ, Campbell BA, Schroeder ZS, Marshall LK, Taber CB. Braking and Propulsion Phase Characteristics of Traditional and Accentuated Eccentric Loaded Back Squats. J Hum Kinet 2024; 91:121-133. [PMID: 38689588 PMCID: PMC11057614 DOI: 10.5114/jhk/185726] [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: 02/12/2024] [Accepted: 03/06/2024] [Indexed: 05/02/2024] Open
Abstract
The purpose of this study was to examine the differences in braking and propulsion force-time characteristics and barbell velocity between traditional (TRAD) and accentuated eccentric loaded (AEL) back squats using various load combinations. Sixteen resistance-trained men participated in four separate testing sessions which included a one repetition maximum (1RM) back squat during the first session and three squat testing sessions. During the squat testing sessions, participants either performed sets of three repetitions of TRAD back squats each with 50, 60, 70, and 80% 1RM or performed the same loads with the addition of weight releasers that increased the total eccentric weight of the first repetition of each set to either 100 (AEL-MAX) or 110% 1RM (AEL-SUPRA). Braking and propulsion mean force, duration, and impulse as well as mean and peak barbell velocity were compared between each condition and load. Significantly greater braking impulses were produced during the AEL-MAX and AEL-SUPRA conditions compared to TRAD (p < 0.03) with small-moderate effect sizes favoring AEL-SUPRA. No other significant differences existed among conditions for other braking, propulsion, or barbell velocity variables. AEL-MAX and AEL-SUPRA back squats may provide a greater braking stimulus compared to TRAD squats; however, the propulsion phase of the movement does not appear to be impacted. From a loading standpoint, larger and smaller load spreads may favor rapid and maximal force production characteristics, respectively. Further research on this topic is needed as a large portion of the braking stimulus experienced during AEL back squats may be influenced by relative strength.
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Affiliation(s)
- Timothy J. Suchomel
- Department of Human Movement Sciences, Carroll University, Waukesha, WI, USA
- Directorate of Sport, Exercise, and Physiotherapy, University of Salford, Greater Manchester, UK
| | - Conor J. Cantwell
- Department of Human Movement Sciences, Carroll University, Waukesha, WI, USA
- Department of Athletics, University of Wisconsin-Platteville, Platteville, WI, USA
| | - Brookelyn A. Campbell
- Department of Human Movement Sciences, Carroll University, Waukesha, WI, USA
- Department of Athletics, University of Houston, Houston, TX, USA
| | - Zachary S. Schroeder
- Department of Human Movement Sciences, Carroll University, Waukesha, WI, USA
- Department of Athletics, Morningside University, Sioux City, IA, USA
| | - Lauren K. Marshall
- Department of Human Movement Sciences, Carroll University, Waukesha, WI, USA
- Department of Fitness, Movement Fitness Rockford, Rockford, IL, USA
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25
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Nabutovsky I, Sabah R, Moreno M, Epstein Y, Klempfner R, Scheinowitz M. Evaluating the Effects of an Enhanced Strength Training Program in Remote Cardiological Rehabilitation: A Shift from Aerobic Dominance-A Pilot Randomized Controlled Trial. J Clin Med 2024; 13:1445. [PMID: 38592308 PMCID: PMC10934934 DOI: 10.3390/jcm13051445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 02/13/2024] [Accepted: 02/26/2024] [Indexed: 04/10/2024] Open
Abstract
(1) Background: Cardiac rehabilitation often emphasizes aerobic capacity while overlooking the importance of muscle strength. This study evaluated the impact of an enhanced remote strength training program (RCR-ST) on cardiac rehabilitation. (2) Methods: In this randomized prospective study (RCT registration number SMC-9080-22), 50 patients starting cardiac rehabilitation were assessed for muscle strength, aerobic capacity, and self-reported outcomes at baseline and after 16 weeks. Participants were divided into two groups: the RCR-ST group received a targeted resistance training program via a mobile app and smartwatch, while the control group received standard care with general resistance training advice. (3) Results: The RCR-ST group demonstrated significant improvements in muscle endurance, notably in leg extension and chest press exercises, with increases of 92% compared to 25% and 92% compared to 13% in the control group, respectively. Functional assessments (5-STS and TUG tests) also showed marked improvements in agility, coordination, and balance. Both groups improved in cardiorespiratory fitness, similarly. The RCR-ST group reported enhanced physical health and showed increased engagement, as evidenced by more frequent use of the mobile app and longer participation in the rehabilitation program (p < 0.05). (4) Conclusions: Incorporating a focused strength training regimen in remote cardiac rehabilitation significantly improves muscle endurance and patient engagement. The RCR-ST program presents a promising approach for optimizing patient outcomes by addressing a crucial gap in traditional rehabilitation protocols that primarily focus on aerobic training.
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Affiliation(s)
- Irene Nabutovsky
- Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
- Cardiac Prevention and Rehabilitation Institute, Leviev Heart Center, Sheba Medical Center, Ramat Gan 5266202, Israel
| | - Roy Sabah
- School of Public Health, Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Merav Moreno
- Cardiac Prevention and Rehabilitation Institute, Leviev Heart Center, Sheba Medical Center, Ramat Gan 5266202, Israel
| | - Yoram Epstein
- School of Public Health, Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Robert Klempfner
- Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
- Cardiac Prevention and Rehabilitation Institute, Leviev Heart Center, Sheba Medical Center, Ramat Gan 5266202, Israel
| | - Mickey Scheinowitz
- Department of Biomedical Engineering, Faculty of Engineering, Tel Aviv University, Tel Aviv 6997801, Israel
- Sylvan Adams Sports Institute, School of Public Health, Faculty of Medicine, Tel Aviv University, Tel Aviv 6423906, Israel
- Neufeld Cardiac Research Institute, Sheba Medical Center, Ramat Gan 5266202, Israel
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26
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Comfort P, McMahon JJ, Lake JP, Ripley NJ, Triplett NT, Haff GG. Relative strength explains the differences in multi-joint rapid force production between sexes. PLoS One 2024; 19:e0296877. [PMID: 38359039 PMCID: PMC10868802 DOI: 10.1371/journal.pone.0296877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 12/21/2023] [Indexed: 02/17/2024] Open
Abstract
The primary aim of this study was to determine whether relative strength explains the differences in the rapid force production (force developed during first 150-, 200-, and 250 ms) of females and males, and to evaluate the relationships between peak force and rapid force production. Sixty-three team sport athletes (females: n = 25, age = 21.5 ± 1.3 years, stature = 166 ± 5 cm, body mass = 60.65 ± 10.04 kg; males: n = 38, age = 21.9 ± 1.1 years, stature = 178 ± 7 cm, body mass = 76.55 ± 12.88 kg) performed a series of isometric mid-thigh pull (IMTP) trials, with all participants' data used for correlational analysis. After testing, females and males were divided into 20 strength-matched pairs, based on their relative peak force (peak force ∙ body mass). There were no meaningful differences between sexes for relative force at 150 ms (g = 0.007 [95% CI -0.627, 0.648]), 200 ms (g = -0.059 [95% CI -0.695, 0.588]) and 250 ms (g = -0.156 [95% CI -0.778, 0.473]). Similarly, when expressed as a percentage of peak force there were no meaningful differences in force at 150 ms (g = -0.015 [95.0%CI -0.650, 0.680]), 200 ms (g = -0.099 [95.0%CI -0.714, 0.559]) or 250 ms (g = -0.272 [95.0%CI -0.856, 0.328]) between strength-matched females and males. Based on the correlations, there were very large to nearly perfect relationships (r = 0.77-0.94, p <0.001) between peak force and rapid force production, with peak force explaining 59%, 77% and 89% of the variance in force at 150-, 200- and 250 ms, respectively. When comparing females and males, relative strength (based on body weight or a percentage of peak force) should be considered, and practitioners should be aware of the role of peak force in rapid force production.
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Affiliation(s)
- Paul Comfort
- Directorate of Psychology and Sport, University of Salford, Salford, Greater Manchester, United Kingdom
- Strength and Power Research Group, School of Medical and Health Sciences, Edith Cowan University, Joondalup, Australia
| | - John J. McMahon
- Directorate of Psychology and Sport, University of Salford, Salford, Greater Manchester, United Kingdom
| | - Jason P. Lake
- Strength and Power Research Group, School of Medical and Health Sciences, Edith Cowan University, Joondalup, Australia
- Chichester Institute of Sport, Nursing, and Allied Health, University of Chichester, Chichester, West Sussex, United Kingdom
| | - Nicholas J. Ripley
- Directorate of Psychology and Sport, University of Salford, Salford, Greater Manchester, United Kingdom
| | - N. Travis Triplett
- Department of Public Health and Exercise Science, Appalachian State University, Boone, North Carolina, United States of America
| | - G. Gregory Haff
- Directorate of Psychology and Sport, University of Salford, Salford, Greater Manchester, United Kingdom
- Strength and Power Research Group, School of Medical and Health Sciences, Edith Cowan University, Joondalup, Australia
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27
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Torres-Banduc M, Chirosa-Ríos L, Chirosa-Ríos IJ, Jerez Mayorga D. Effects of different lower limb strengthening protocols on muscle activity, strength and power in sedentary and physically inactive subjects: a systematic review. NUTR HOSP 2024; 41:202-211. [PMID: 37534442 DOI: 10.20960/nh.04551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2023] Open
Abstract
Introduction The purpose of this systematic review was: a) to determine the quality of evidence from studies assessing the effects of different lower limb strengthening protocols on muscle activity, strength, and power in sedentary and/or physically inactive subjects; and b) to determine the effectiveness of lower extremity strengthening protocols on muscle activity, strength, and power in sedentary and/or physically inactive subjects. Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA) statements were followed using keywords associated with strength training, lower limb, sedentary, and physical inactivity. Four databases were used: Medline via PubMed, Web of Science, Scopus and SPORTDiscus. Methodological quality was assessed using the PEDro scale. A total of 164 articles were retrieved, six included in this review. Four studies were classified as fair methodological quality, and two were considered of good methodological quality. Due to the heterogeneity in methodological aspects and the limited number of articles including the variables under study, it was not possible to establish a measure of effectiveness of lower limb strengthening protocols on muscle activity, strength, or power. In conclusion, strength training in the lower limb seems to improve the levels of strength, power, and muscular activity in sedentary subjects. However, due to the limited number of articles, methodological variability, and training methods used, it is necessary to conduct new studies that control these variables.
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Affiliation(s)
- Maximiliano Torres-Banduc
- Department of Physical Education and Sports. Faculty of Sport Sciences. Universidad de Granada. School of Kinesiology. Faculty of Health Sciences. Universidad de Las Américas. School of Health Sciences. Universidad de Viña del Mar
| | - Luis Chirosa-Ríos
- Department of Physical Education and Sports. Faculty of Sport Sciences. Universidad de Granada. Granada
| | - Ignacio J Chirosa-Ríos
- Department of Physical Education and Sports. Faculty of Sport Sciences. Universidad de Granada. Granada
| | - Daniel Jerez Mayorga
- Exercise and Rehabilitation Sciences Institute. School of Physical Therapy. Faculty of Rehabilitation Sciences. Universidad Andres Bello
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Dragutinovic B, Moser F, Feuerbacher JF, Schumann M. Non-Local Muscle Fatigue Impairs Mean Propulsive Velocity During Strength Loading in Strength-Trained Men. RESEARCH QUARTERLY FOR EXERCISE AND SPORT 2024:1-8. [PMID: 38306694 DOI: 10.1080/02701367.2023.2298455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 12/19/2023] [Indexed: 02/04/2024]
Abstract
Purpose: This study examined the acute influence of a bench press (BP) loading on the explosive squat (SQ) performance and vice versa. Methods: Nineteen strength-trained men completed 2 experimental sessions consisting of either a SQ+BP loading or a BP+SQ loading with 3 × 5 + 3 × 3 repetitions at 80% of the 1-repetition maximum in a randomized order. SQ and BP mean propulsive velocity (MPV) were assessed during both loadings, at baseline (T0) as well as immediately after the first (T1) and second strength loading (T2). Results: Both BP and SQ MPV decreased between T0 and T1 in SQ+BP (-6.13 ± 6.13%, p = .014, g = 0.485 and -9.11 ± 7.23%, p < .001, g = 0.905, respectively) and BP+SQ (-15.15 ± 7.69%, p < .001, g = 1.316 and -7.18 ± 6.16%, p < .001, g = 0.724, respectively). Mean BP MPV was lower in set 2 to set 6 in SQ+BP when compared to BP+SQ (-7.90% - 9.88%, all p < .05, g = 0.523-0.808). Mean SQ MPV was lower in set 1 and set 4 in BP+SQ when compared to SQ+BP (-4.94% - 5.22%, all p < .001, g = 0.329-0.362). Conclusions: These results demonstrate that the presence of non-local muscle fatigue affects the movement velocity. Therefore, if a training program aims to perform strength training exercises with maximal movement velocity, it is essential to carefully evaluate whether upper and lower body exercises should be carried out within close proximity.
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da Silva VS, Martins JCW, Fochesatto A, de Souza CG. Body image perception and dissatisfaction in resistance training practitioners: A critical review of the literature of Brazilian studies and assessment tools used. J Health Psychol 2024; 29:156-169. [PMID: 37387357 DOI: 10.1177/13591053231183593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/01/2023] Open
Abstract
This study aimed to review the findings on body image (BI) dissatisfaction and muscle dysmorphia (MD) in Brazilian RT practitioners and the differences in the assessment tools used. A critical review of studies with searches in PubMed, Brazilian Virtual Health Library, SciELO, PsycInfo, and SPORTDiscus databases was conducted. A total of 23 studies were included. Nine tools were used to assess BI dissatisfaction or MD: three questionnaires and six visual scales. The overall mean BI dissatisfaction was 56.5% (59.2% in men vs 57.3% in women). The mean MD was 42.4% (45.1% in women vs 38.5% in men). BI dissatisfaction and MD are related to women seeking slimness and men wanting to increase muscle mass. In conclusion, the frequency of BI was high in both sexes, and MD, when identified, was higher in women. The scales and questionnaires used differ significantly in depth and scope for the same purpose.
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Affiliation(s)
| | | | | | - Carolina Guerini de Souza
- Universidade Federal do Rio Grande do Sul (UFRGS), Brazil
- Hospital de Clínicas de Porto Alegre, Brazil
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Martínez-Rubio C, Quidel-Catrilelbún MEL, Baena-Raya A, Rodríguez-Pérez MA, Pérez-Castilla A. Inter-repetition Rest Impact on Percentage of Repetition Completed at Certain Velocity Loss. Int J Sports Med 2024; 45:116-124. [PMID: 38109899 DOI: 10.1055/a-2200-5937] [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: 12/20/2023]
Abstract
This study examined the impact of different inter-repetition rest (IRR) configurations (zero seconds [IRR0], three seconds [IRR3], and self-selected less than five seconds [SSIRR]) on estimating the number of repetitions (Nrep) and the percentage of completed repetitions relative to the maximum number of repetitions possible to failure (%rep) after reaching 10%, 20%, and 30% velocity loss thresholds (VLT). Eighteen men completed three sessions, each with a different IRR configuration, separated by 48-72 hours. Single sets of repetitions to momentary muscular failure were performed against 65%, 75%, and 85% of the one-repetition maximum during free-weight back squat and bench press exercises. No significant differences were reported between IRR configurations for the Nrep (P≥0.089) and %rep (P≥0.061), except for %rep after reaching the 20-30%VLT against 65%1RM and the 10-20%VLT against 75%1RM in the bench press exercise (P≤0.048). Additionally, both Nrep and %rep exhibited high interindividual variability (between-subject CV=14-79%) across the different IRR configurations. The individual %rep-%VLT relationships were slightly stronger than the general %rep-%VLT relationships (median R 2 =0.914-0.971 vs. 0.698-0.900). Overall, regardless of the IRR configuration, this novel velocity-based approach does not guarantee the same effort levels across subjects in the free-weight back squat and bench press sets.
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Affiliation(s)
- Carlos Martínez-Rubio
- SPORT Research Group (CTS-1024), CIBIS, Research Center, University of Almería, Almería, Spain
| | | | - Andrés Baena-Raya
- SPORT Research Group (CTS-1024), CIBIS, Research Center, University of Almería, Almería, Spain
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Falch HN, Hegdahl Gundersen A, Larsen S, Estifanos Haugen M, van den Tillaar R. Comparison of kinematics and electromyography in the last repetition during different maximum repetition sets in the barbell back squat. PeerJ 2024; 12:e16865. [PMID: 38313010 PMCID: PMC10838531 DOI: 10.7717/peerj.16865] [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: 10/03/2023] [Accepted: 01/10/2024] [Indexed: 02/06/2024] Open
Abstract
Background The barbell squat is an exercise used to strengthen the lower limbs, with implications for both performance in sports and improving movement during everyday tasks. Although the exercise is being trained across a variety of repetition ranges, the technical requirements may vary, affecting appropriate repetition range for specific training goals. Methods A randomised within-subject design was used to compare kinematics and surface electromyography (EMG) in the lower extremities during different concentric phases (pre-, sticking- and post-sticking region) of the last repetition when performing squats at different repetition maximums (RMs). Thirteen strength-trained men (age: 23.6 ± 1.9 years; height: 181.1 ± 6.5 cm; body mass: 82.2 kg, 1RM: 122.8 ± 16.2, relative strength: 1.5 ± 0.2 x body mass in external load) performed a 1, 3, 6, and 10RM squat, in a randomised order. Results The main findings were that barbell-, ankle-, knee- and hip kinematics were similar across different repetition ranges, except for a smaller trunk lean at 1RM in the pre-sticking region compared to other repetitions and in the sticking region compared to 10RM (p ≤ 0.04). Furthermore, 1RM revealed significantly higher EMG amplitude in the vastus lateralis, gastrocnemius and soleus in the sticking and post-sticking regions when compared to 10RM. It was concluded that 10RM may locally fatigue the vastus lateralis and plantar flexors, explaining the lower EMG amplitude. The observed differences indicate that requirements vary for completing the final repetition of the 10RM compared to the 1RM, an important aspect to consider in training to enhance 1RM strength.
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Affiliation(s)
- Hallvard Nygaard Falch
- Department for Sports Science and Physical Education, Nord University, Levanger, Trøndelag, Norway
| | | | - Stian Larsen
- Department for Sports Science and Physical Education, Nord University, Levanger, Trøndelag, Norway
| | - Markus Estifanos Haugen
- Department for Sports Science and Physical Education, Nord University, Levanger, Trøndelag, Norway
| | - Roland van den Tillaar
- Department for Sports Science and Physical Education, Nord University, Levanger, Trøndelag, Norway
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Fitas A, Santos P, Gomes M, Pezarat-Correia P, Schoenfeld BJ, Mendonca GV. Prediction of One Repetition Maximum in Free-Weight Back Squat Using a Mixed Approach: The Combination of the Individual Load-Velocity Profile and Generalized Equations. J Strength Cond Res 2024; 38:228-235. [PMID: 38088936 DOI: 10.1519/jsc.0000000000004632] [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] [Indexed: 01/24/2024]
Abstract
ABSTRACT Fitas, A, Santos, P, Gomes, M, Pezarat-Correia, P, Schoenfeld, BJ, and Mendonca, GV. Prediction of one repetition maximum in free-weight back squat using a mixed approach: the combination of the individual load-velocity profile and generalized equations. J Strength Cond Res 38(2): 228-235, 2024-We aimed to develop a mixed methods approach for 1 repetition maximum (1RM) prediction based on the development of generalized equations and the individual load-velocity profile (LVP), and to explore the validity of such equations for 1RM prediction. Fifty-seven young men volunteered to participate. The submaximal load-velocity relationship was obtained for the free-weight parallel back squat. The estimated load at 0 velocity (LD0) was used as a single predictor, and in combination with the slope of the individual LVP, to develop equations predictive of 1RM. Prediction accuracy was determined through the mean absolute percent error and Bland-Altman plots. LD0 was predictive of 1RM ( p < 0.0001), explaining 70.2% of its variance. Adding the slope of the LVP to the model increased the prediction power of 1RM to 84.4% ( p < 0.0001). The absolute percent error between actual and predicted 1RM was lower for the predictions combining LD0 and slope (6.9 vs. 9.6%). The mean difference between actual and estimated 1RM was nearly zero and showed heteroscedasticity for the LD0 model, but not for the combined model. The limits of agreement error were of 31.9 and 23.5 kg for LD0 and LD0 combined with slope, respectively. In conclusion, the slope of the individual LVP adds predictive value to LD0 in 1RM estimation on a group level and avoids error trends in the estimation of 1RM over the entire spectrum of muscle strength. However, the use of mixed methods does not reach acceptable accuracy for 1RM prediction of the free-weight back squat on an individual basis.
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Affiliation(s)
- Afonso Fitas
- Neuromuscular Research Lab, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada Dafundo, Portugal
| | - Paulo Santos
- Neuromuscular Research Lab, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada Dafundo, Portugal
- CIPER, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada, Dafundo, Portugal; and
| | - Miguel Gomes
- Neuromuscular Research Lab, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada Dafundo, Portugal
- CIPER, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada, Dafundo, Portugal; and
| | - Pedro Pezarat-Correia
- Neuromuscular Research Lab, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada Dafundo, Portugal
- CIPER, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada, Dafundo, Portugal; and
| | - Brad J Schoenfeld
- Department of Exercise Science and Recreation, CUNY Lehman College, Bronx, New York
| | - Goncalo V Mendonca
- Neuromuscular Research Lab, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada Dafundo, Portugal
- CIPER, Faculty of Human Kinetics, University of Lisbon, Estrada da Costa, 1499-002, Cruz Quebrada, Dafundo, Portugal; and
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Saeterbakken AH, Stien N, Pedersen H, Langer K, Scott S, Michailov ML, Gronhaug G, Baláš J, Solstad TEJ, Andersen V. The Connection Between Resistance Training, Climbing Performance, and Injury Prevention. SPORTS MEDICINE - OPEN 2024; 10:10. [PMID: 38240903 PMCID: PMC10798940 DOI: 10.1186/s40798-024-00677-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 01/03/2024] [Indexed: 01/22/2024]
Abstract
BACKGROUND Climbing is an intricate sport composed of various disciplines, holds, styles, distances between holds, and levels of difficulty. In highly skilled climbers the potential for further strength-specific adaptations to increase performance may be marginal in elite climbers. With an eye on the upcoming 2024 Paris Olympics, more climbers are trying to maximize performance and improve training strategies. The relationships between muscular strength and climbing performance, as well as the role of strength in injury prevention, remain to be fully elucidated. This narrative review seeks to discuss the current literature regarding the effect of resistance training in improving maximal strength, muscle hypertrophy, muscular power, and local muscular endurance on climbing performance, and as a strategy to prevent injuries. MAIN BODY Since sport climbing requires exerting forces against gravity to maintain grip and move the body along the route, it is generally accepted that a climber`s absolute and relative muscular strength are important for climbing performance. Performance characteristics of forearm flexor muscles (hang-time on ledge, force output, rate of force development, and oxidative capacity) discriminate between climbing performance level, climbing styles, and between climbers and non-climbers. Strength of the hand and wrist flexors, shoulders and upper limbs has gained much attention in the scientific literature, and it has been suggested that both general and specific strength training should be part of a climber`s training program. Furthermore, the ability to generate sub-maximal force in different work-rest ratios has proved useful, in examining finger flexor endurance capacity while trying to mimic real-world climbing demands. Importantly, fingers and shoulders are the most frequent injury locations in climbing. Due to the high mechanical stress and load on the finger flexors, fingerboard and campus board training should be limited in lower-graded climbers. Coaches should address, acknowledge, and screen for amenorrhea and disordered eating in climbers. CONCLUSION Structured low-volume high-resistance training, twice per week hanging from small ledges or a fingerboard, is a feasible approach for climbers. The current injury prevention training aims to increase the level of performance through building tolerance to performance-relevant load exposure and promoting this approach in the climbing field.
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Affiliation(s)
- Atle Hole Saeterbakken
- Department of Sport, Food and Natural Sciences, Faculty of Education, Western Norway University of Applied Sciences, Campus Sogndal, Røyrgata 6, 6856, Sogndal, Norway.
| | - Nicolay Stien
- Department of Sport, Food and Natural Sciences, Faculty of Education, Western Norway University of Applied Sciences, Campus Sogndal, Røyrgata 6, 6856, Sogndal, Norway
| | - Helene Pedersen
- Department of Sport, Food and Natural Sciences, Faculty of Education, Western Norway University of Applied Sciences, Campus Sogndal, Røyrgata 6, 6856, Sogndal, Norway
| | - Kaja Langer
- Department of Human Sciences, Institute of Sports Science, Technical University Darmstadt, Darmstadt, Germany
| | - Suzanne Scott
- School of Anatomy, Faculty of Health and Life Sciences, University of Bristol, Bristol, UK
| | | | - Gudmund Gronhaug
- Department of Sport, Food and Natural Sciences, Faculty of Education, Western Norway University of Applied Sciences, Campus Sogndal, Røyrgata 6, 6856, Sogndal, Norway
| | - Jiří Baláš
- Faculty of Physical Education and Sport, Charles University, Prague, Czech Republic
| | - Tom Erik Jorung Solstad
- Department of Sport, Food and Natural Sciences, Faculty of Education, Western Norway University of Applied Sciences, Campus Sogndal, Røyrgata 6, 6856, Sogndal, Norway
| | - Vidar Andersen
- Department of Sport, Food and Natural Sciences, Faculty of Education, Western Norway University of Applied Sciences, Campus Sogndal, Røyrgata 6, 6856, Sogndal, Norway
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Stoffels AAF, Allard NAE, Spruit MA, Klijn P, Hopman MTE, Meys R, Franssen FME, Timmers S, van den Borst B, van Hees HWH. Relationship between Volitional and Non-Volitional Quadriceps Muscle Endurance in Patients with Chronic Obstructive Pulmonary Disease. Diagnostics (Basel) 2024; 14:190. [PMID: 38248067 PMCID: PMC10814454 DOI: 10.3390/diagnostics14020190] [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: 10/31/2023] [Revised: 12/24/2023] [Accepted: 01/03/2024] [Indexed: 01/23/2024] Open
Abstract
Volitional assessment of quadriceps muscle endurance is clinically relevant in patients with chronic obstructive pulmonary disease (COPD). However, studies that determine the construct validity of volitional tests by comparing them to non-volitional measures are lacking. Therefore, the aim of the current study is to evaluate the correlation between volitional and non-volitional quadriceps muscle endurance in patients with COPD. Quadriceps muscle endurance was evaluated in twenty-six patients with COPD. A volitional isometric and a volitional isokinetic protocol were performed on a computerised dynamometer to determine the isometric time and isokinetic work fatigue index, respectively. Non-volitional assessment of quadriceps muscle endurance was evaluated using repetitive electrical stimulations to establish the isometric muscle force decline. Sixteen patients (61 ± 8 years, 63% male, FEV1 47 (32-53)%) performed all three quadriceps endurance tests conforming to pre-defined test criteria. Both volitional isometric time and isokinetic work fatigue index did not significantly correlate with non-volitional muscle force decline (both p > 0.05). There was a strong correlation between volitional isometric time and isokinetic work fatigue index (rho = -0.716, p = 0.002). To conclude, this study suggests that volitional measures evaluate partly different aspects of quadriceps muscle endurance compared to non-volitional measures. Accordingly, these outcome measures cannot be used interchangeably.
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Affiliation(s)
- Anouk A. F. Stoffels
- Department of Pulmonary Diseases, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands (B.v.d.B.)
| | - Neeltje A. E. Allard
- Department of Physiology, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands (M.T.E.H.)
| | - Martijn A. Spruit
- Department of Research and Development, Ciro, 6085 NM Horn, The Netherlands; (M.A.S.); (R.M.); (F.M.E.F.)
- NUTRIM School of Nutrition and Translational Research in Metabolism, Faculty of Health and Life Sciences, Maastricht University, 6229 HX Maastricht, The Netherlands
- Department of Respiratory Medicine, Maastricht University Medical Centre (MUMC+), 6229 HX Maastricht, The Netherlands
| | - Peter Klijn
- Department of Pulmonology, Merem Pulmonary Rehabilitation Centre, 1213 VX Hilversum, The Netherlands;
- Department of Pulmonary Medicine, Amsterdam University Medical Centre, 1105 AZ Amsterdam, The Netherlands
| | - Maria T. E. Hopman
- Department of Physiology, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands (M.T.E.H.)
| | - Roy Meys
- Department of Research and Development, Ciro, 6085 NM Horn, The Netherlands; (M.A.S.); (R.M.); (F.M.E.F.)
- NUTRIM School of Nutrition and Translational Research in Metabolism, Faculty of Health and Life Sciences, Maastricht University, 6229 HX Maastricht, The Netherlands
- Department of Respiratory Medicine, Maastricht University Medical Centre (MUMC+), 6229 HX Maastricht, The Netherlands
| | - Frits M. E. Franssen
- Department of Research and Development, Ciro, 6085 NM Horn, The Netherlands; (M.A.S.); (R.M.); (F.M.E.F.)
- NUTRIM School of Nutrition and Translational Research in Metabolism, Faculty of Health and Life Sciences, Maastricht University, 6229 HX Maastricht, The Netherlands
- Department of Respiratory Medicine, Maastricht University Medical Centre (MUMC+), 6229 HX Maastricht, The Netherlands
| | - Silvie Timmers
- Human and Animal Physiology, Wageningen University, 6708 WD Wageningen, The Netherlands;
| | - Bram van den Borst
- Department of Pulmonary Diseases, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands (B.v.d.B.)
| | - Hieronymus W. H. van Hees
- Department of Pulmonary Diseases, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands (B.v.d.B.)
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Raineteau Y, Pla R, Bideau B, Bideau N, Nicolas G. From dry-land to the water: training and testing practices of strength and conditioning coaches in high level French sprint swimmers. Front Sports Act Living 2024; 5:1338856. [PMID: 38283120 PMCID: PMC10811196 DOI: 10.3389/fspor.2023.1338856] [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: 11/15/2023] [Accepted: 12/29/2023] [Indexed: 01/30/2024] Open
Abstract
Introduction The aim of this study was to explore training and testing practices from Strength & Conditioning (S&C) coaches who manage groups of high-level French swimmers in elite training centers. The transfer of abilities from dry-land to in situ condition was also investigated. Methods 24 French S&C coaches completed a survey via an online platform. Frequency analyses were made for quantitative and qualitative responses, the level of significance set for this study was p ≤ 0.05. Results Core stability, Strength & Power were the three most targeted qualities. Core strengthening in all its forms, Bench Press & Squat were the three most prescribed exercises. 79% of S&C coaches adapted exercises according to different parameters. Most of the coaches indicated that dry-land S&C sessions were preferentially placed before in-water sessions. Very varied exercises were used in-water to make the transfer from dry-land more effective. 87% of participants monitored the training load and 38% assessed the force and velocity parameters for some S&C exercises. Discussion Dry-land training practices of S&C coaches were mostly in line with scientific recommendations. In the light of results of the questionnaire, it would appear that testing procedures might be a key issue for transferring qualities from dry-land to in situ.
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Affiliation(s)
- Yannis Raineteau
- M2S Laboratory—Laboratoire Mouvement Sport Santé, Université Rennes 2, Rennes, France
- Optimization Service, Fédération Française de Natation, Clichy, France
| | - Robin Pla
- Optimization Service, Fédération Française de Natation, Clichy, France
| | - Benoit Bideau
- M2S Laboratory—Laboratoire Mouvement Sport Santé, Université Rennes 2, Rennes, France
- MIMETIC-Team, INRIA Rennes Bretagne Atlantique, Rennes, France
| | - Nicolas Bideau
- M2S Laboratory—Laboratoire Mouvement Sport Santé, Université Rennes 2, Rennes, France
- MIMETIC-Team, INRIA Rennes Bretagne Atlantique, Rennes, France
| | - Guillaume Nicolas
- M2S Laboratory—Laboratoire Mouvement Sport Santé, Université Rennes 2, Rennes, France
- MIMETIC-Team, INRIA Rennes Bretagne Atlantique, Rennes, France
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Izadi M, Pillitteri G, Thomas E, Battaglia G, Bianco A, Bellafiore M. Sex differences in the determination of prescribed load in ballistic bench press. Front Physiol 2024; 15:1293044. [PMID: 38282756 PMCID: PMC10811050 DOI: 10.3389/fphys.2024.1293044] [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: 09/12/2023] [Accepted: 01/03/2024] [Indexed: 01/30/2024] Open
Abstract
Introduction: The objectives of the present study were twofold: first, to identify the specific relative load at which the concentric motion transforms into a purely propulsive action among women, and second, to compare the load-velocity relationships between men and women during the bench press throw. Methods: Fourteen men and fourteen women participated in a test where they progressively increased the load until reaching their one-repetition maximum (1RM) in the bench press exercise. Linear regression models were employed to elucidate the relationships between load and velocity, as well as load and the propulsive phase (% of total concentric time). Additionally, ANCOVA was utilized to compare the linear regression models between men and women. Results: The results revealed strong and linear associations between load and mean propulsive velocity (MPV) for both men and women, as well as between load and the propulsive phase. Notably, there were significant differences in MPV and the propulsive phase concerning load between men and women. Women transitioned into a fully propulsive concentric phase at approximately 80% of their 1RM, while men achieved this entirely propulsive phase at around 85% of their 1RM. Furthermore, women exhibited reduced velocities when handling lighter relative loads compared to men. Conversely, women demonstrated higher velocities when dealing with loads exceeding 85% of their 1RM in contrast to their male counterparts. Discussion: These findings hold notable implications for prescribing bench press throw loads for women, which should differ from those recommended for men. Further studies are necessary to validate the efficacy of the proposed load recommendations.
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Affiliation(s)
- Mohammad Izadi
- Sport and Exercise Research Unit, Department of Psychology, Educational Sciences and Human Movement, University of Palermo, Palermo, Italy
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Niering M, Wolf-Belala N, Seifert J, Tovar O, Coldewey J, Kuranda J, Muehlbauer T. The Influence of Menstrual Cycle Phases on Maximal Strength Performance in Healthy Female Adults: A Systematic Review with Meta-Analysis. Sports (Basel) 2024; 12:31. [PMID: 38251305 PMCID: PMC10818650 DOI: 10.3390/sports12010031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 12/29/2023] [Accepted: 01/09/2024] [Indexed: 01/23/2024] Open
Abstract
Maximal strength is a significant factor in achieving peak performance and injury prevention in athletes. In individualization strategies for the efficient development of athletes, it is necessary to consider the respective components separately. The purpose of this study was to systematically examine the effects of the different cycle phases on isometric, isokinetic, and dynamic maximum strength. A systematic literature review was conducted; databases were searched from January 1960 to September 2023. The included studies focused on the expression of maximal strength in the earlier follicular phase as well as at least one comparative phase. Of the initial 707 articles identified, 22 met the selection criteria and were included. The studies considered a total of 433 subjects. Our results revealed medium effects (weighted mean standardized mean difference (SMD) = 0.60; seven studies) for isometric maximal strength in favor of the late follicular phase, small effects (weighted mean SMD = 0.39; five studies) for isokinetic maximal strength in favor of the ovulation phase, and small effects (weighted mean SMD = 0.14; three studies) for dynamic maximal strength in favor of the late follicular phase. The results indicate that the early follicular phase is unfavorable for all strength classes. Peak performance in isometric strength is seen in the late follicular phase, whereas isokinetic strength peaks during ovulation. Dynamic strength is optimal in the late follicular phase.
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Affiliation(s)
- Marc Niering
- Institute of Biomechanics and Neurosciences, Nordic Science, 30173 Hannover, Germany; (M.N.); (N.W.-B.); (J.S.)
| | - Nacera Wolf-Belala
- Institute of Biomechanics and Neurosciences, Nordic Science, 30173 Hannover, Germany; (M.N.); (N.W.-B.); (J.S.)
| | - Johanna Seifert
- Institute of Biomechanics and Neurosciences, Nordic Science, 30173 Hannover, Germany; (M.N.); (N.W.-B.); (J.S.)
- Department of Psychiatry, Social Psychiatry and Psychotherapy, Medical School Hannover, 30625 Hannover, Germany
| | - Ole Tovar
- Department of Sports Science, Bielefeld University, 33615 Bielefeld, Germany;
| | - Jacqueline Coldewey
- Institute of Sport Sciences, Biosciences of Sports, University of Hildesheim, 31141 Hildesheim, Germany;
| | - Jennifer Kuranda
- Triagon Academy Munich, School of Sports, Psychology and Education, 85737 Ismaning, Germany;
| | - Thomas Muehlbauer
- Division of Movement and Training Sciences/Biomechanics of Sport, University of Duisburg-Essen, 45141 Essen, Germany
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Ageberg E, Bunke S, Linnéll J, Moesch K. Co-creating holistic injury prevention training for youth handball: Development of an intervention targeting end-users at the individual, team, and organizational levels. BMC Sports Sci Med Rehabil 2024; 16:10. [PMID: 38191495 PMCID: PMC10773026 DOI: 10.1186/s13102-023-00800-6] [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: 07/19/2023] [Accepted: 12/22/2023] [Indexed: 01/10/2024]
Abstract
BACKGROUND Interventions that are co-created with end-users, and that are informed by behavior change or implementation theories, support implementation in real world settings. However, injury prevention programs for youth athletes have typically been developed by experts with no, or insufficiently described, end-user involvement and without guidance by theories. The aim of the current study was to describe the development of a holistic injury prevention intervention for youth handball targeting end-users at different levels, through using knowledge from end-users and researchers/experts and applying relevant behavior change and implementation theories. METHODS Knowledge from researchers/experts (sports medicine, sport psychology, handball, physical therapy, strength and conditioning (n = 14)) and end-users (coaches, players, club administrators, n = 16), and applying relevant implementation (Consolidated Framework for Implementation Research, CFIR), behavior change (Health Action Process Approach, HAPA) and motivational (Self-Determination Theory, SDT) theories, were used to co-design the intervention. Early end-users (coaches (n = 6), players (n = 3) and a club administrator (n = 1)) were interviewed for initial feedback. RESULTS The intervention consisted of end-user-targeted information and training that was made available in a specifically developed interactive mobile application with modules for players, coaches, club administrators, and caregivers. Information for all end-users included benefits and principles of physical and psychological injury prevention training, load-management, motivation, and communication. Information about implementation was developed for club administrators specifically. For coaches, training to do with their teams included handball-specific injury prevention exercises (legs, shoulders, core) combined with psychological aspects (motivation, task focus, body awareness) to integrate within warm-up and handball skills training. Training for players included handball-specific multi-joint strength, power, and explosive exercises (legs, shoulders, core) and sport psychology exercises (self-awareness, relaxation, being in the present moment, prevent and handle stress). To support self-management, adoption, and motivation, programs were provided, and players and coaches could change, add, progress the difficulty of exercises, and build their own programs. Initial feedback from early end-users was generally positive. CONCLUSIONS Utilizing an approach where researchers/experts and end-users co-created injury prevention training specifically for youth handball, an intervention was generated that included information and holistic training targeting end-users at the individual (players, caregivers), team (coaches), and organizational (club administrators) levels.
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Affiliation(s)
- Eva Ageberg
- Department of Health Sciences, Faculty of Medicine, Lund University, PO Box 117, Lund, SE-221 00, Sweden.
| | - Sofia Bunke
- Department of Psychology, Lund University, Lund, Sweden
| | - Jennie Linnéll
- Department of Health Sciences, Faculty of Medicine, Lund University, PO Box 117, Lund, SE-221 00, Sweden
- Swedish Handball Federation, Stockholm, Sweden
| | - Karin Moesch
- Department of Psychology, Lund University, Lund, Sweden
- Department of Sports Sciences, Malmö University, Malmö, Sweden
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Tascioglu EN, Karademir S, Kara K, Tonak HA, Kara OK. Effectiveness of Power Exercises Compared to Traditional Strength Exercises on Motor Skills, Muscle Performance and Functional Muscle Strength of Children with Attention Deficit Hyperactivity Disorder: A Single-Blind Randomized Controlled Trial. Dev Neurorehabil 2024; 27:17-26. [PMID: 38650431 DOI: 10.1080/17518423.2024.2345335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Accepted: 04/16/2024] [Indexed: 04/25/2024]
Abstract
The aim of this study was to compare the impact of 8-weeks of power exercises compared to traditional strength exercises on motor abilities, muscle performance, and functional strength in children with ADHD. A total of 34 children with ADHD were randomized into two groups to receive functional power training (n = 17, M age: 121.2 ± 16.6 months) and traditional strength training (n = 17, M age: 116.1 ± 13.4 months). After the 8-week intervention, two-way ANOVA results with 95% confidence intervals showed no differences between the groups in motor skills, muscle power, or functional muscle strength. However, the functional power training group had larger effect sizes and greater increases in total motor composite score (10% vs 7%), body coordination (13.8% vs 4.9%) and bilateral coordination (38.8% vs 27.9%) than the traditional strength training group. The power training group also exhibited catch-up growth with typically developing peers. These findings suggest that power exercises may be more effective than strength exercises for rapid force generation in daily life, particularly for children with ADHD.
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Affiliation(s)
| | | | - Koray Kara
- University of Health Sciences, Antalya, Turkey
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Martínez-Rubio C, Baena-Raya A, Díez-Fernández DM, Rodríguez-Pérez MA, Pareja-Blanco F. Examining Unilateral and Bilateral Exercises through the Load-velocity Relationship. Int J Sports Med 2024; 45:41-47. [PMID: 37557918 DOI: 10.1055/a-2151-0661] [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: 08/11/2023]
Abstract
This study aimed to examine the load-velocity (L-V) relationship in the bench-press (BP) and leg-press (LP) exercises performed unilaterally, and compared this unilateral L-V relationship with the bilateral variants. Nineteen men (age=23.5±2.1 years) completed two incremental tests in BP and LP, performed bilaterally and unilaterally, across two sessions with a 48-hour rest period. We found a close relationship between medium propulsive velocity (MPV) and %1RM in unilateral BP (R2 =0.97, SEE=0.06 m·s-1) and LP (R2=0.96, SEE=0.06 m·s-1). No significant differences were observed between the preferred and non-preferred sides in the L-V relationship for either exercise. Additionally, higher velocities were achieved in unilateral exercises compared to bilateral exercises, particularly with light and moderate loads (30-70%1RM) in BP (p<0.05) and with light loads (30-45%1RM) in LP (p<0.05). Close L-V relationships were observed in unilateral exercises, without differences in the L-V relationships between preferred and non-preferred sides despite the interlimb asymmetries in the absolute strength values. Interestingly, lower velocities were observed at light loads (~30-45% 1RM) for bilateral compared to unilateral exercises, which could be explained by different strength deficits for these exercises.
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Affiliation(s)
- Carlos Martínez-Rubio
- Department of Education, Faculty of Education Sciences, University of Almeria, Almería, Spain
- CERNEP Research Center, SPORT Research Group (CTS1024), Almería, Spain
| | - Andrés Baena-Raya
- Department of Education, Faculty of Education Sciences, University of Almeria, Almería, Spain
- CERNEP Research Center, SPORT Research Group (CTS1024), Almería, Spain
| | - David M Díez-Fernández
- Department of Education, Faculty of Education Sciences, University of Almeria, Almería, Spain
- CERNEP Research Center, SPORT Research Group (CTS1024), Almería, Spain
| | - Manuel Antonio Rodríguez-Pérez
- Department of Education, Faculty of Education Sciences, University of Almeria, Almería, Spain
- CERNEP Research Center, SPORT Research Group (CTS1024), Almería, Spain
| | - Fernando Pareja-Blanco
- Department of Sports and Computers Sciences, Pablo de Olavide University, Sevilla, Spain
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Loturco I, Zabaloy S, Pereira LA, Moura TBMA, Mercer VP, Victor F, Zając A, Matusinski A, Freitas TT, Bishop C. Resistance Training Practices of Brazilian Olympic Sprint and Jump Coaches: Toward a Deeper Understanding of Their Choices and Insights (Part III). J Hum Kinet 2024; 90:183-214. [PMID: 38380293 PMCID: PMC10875694 DOI: 10.5114/jhk/182888] [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: 01/02/2024] [Accepted: 01/20/2024] [Indexed: 02/22/2024] Open
Abstract
In the final part of this three-article collection on the training strategies of Brazilian Olympic sprint and jump coaches, we provide a detailed description of the resistance training methods and exercises most commonly employed by these speed experts. Always with the objective of maximizing the sprint and jump capabilities of their athletes, these experienced coaches primarily utilize variable, eccentric, concentric, machine-based, isometric, complex, and isoinertial resistance training methods in their daily practices. Squats (in their different forms), Olympic weightlifting, ballistics, hip thrusts, lunges, calf raises, core exercises, leg curls, stiff-leg deadlifts, and leg extension are the most commonly prescribed exercises in their training programs, during both the preparatory and competitive periods. Therefore, the current manuscript comprehensively describes and examines these methods, with the additional aim of extrapolating their application to other sports, especially those where sprint speed is a key performance factor.
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Affiliation(s)
- Irineu Loturco
- NAR—Nucleus of High Performance in Sport, São Paulo, Brazil
- Department of Human Movement Sciences, Federal University of São Paulo, São Paulo, Brazil
- Department of Sport, Health, and Exercise Science, University of South Wales, Pontypridd, Wales, United Kingdom
| | - Santiago Zabaloy
- Faculty of Physical Activity and Sports, University of Flores, Buenos Aires, Argentina
| | | | | | | | | | - Adam Zając
- Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education in Katowice, Katowice, Poland
| | - Aleksander Matusinski
- Department of Exercise and Sport Performance, The Jerzy Kukuczka Academy of Physical Education in Katowice, Katowice, Poland
| | - Tomás T. Freitas
- NAR—Nucleus of High Performance in Sport, São Paulo, Brazil
- UCAM Research Center for High Performance Sport, UCAM Universidad Católica de Murcia, Murcia, Spain
- Facultad de Deporte, UCAM Universidad Católica de Murcia, Murcia, Spain
| | - Chris Bishop
- London Sport Institute, Middlesex University, London, United Kingdom
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James LP, Weakley J, Comfort P, Huynh M. The Relationship Between Isometric and Dynamic Strength Following Resistance Training: A Systematic Review, Meta-Analysis, and Level of Agreement. Int J Sports Physiol Perform 2024; 19:2-12. [PMID: 37741636 DOI: 10.1123/ijspp.2023-0066] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 07/30/2023] [Accepted: 08/14/2023] [Indexed: 09/25/2023]
Abstract
BACKGROUND Maximal lower-body strength can be assessed both dynamically and isometrically; however, the relationship between the changes in these 2 forms of strength following resistance training is not well understood. PURPOSE To systematically review and analyze the effects of resistance training on changes in maximal dynamic (1-repetition-maximum back squat, deadlift, and power clean) and position-matched isometric strength (isometric midthigh pull and the isometric squat). In addition, individual-level data were used to quantify the agreement and relationship between changes in dynamic and isometric strength. METHODS Databases were systematically searched to identify eligible articles, and meta-analysis procedures were performed on the extracted data. The raw results from 4 studies were acquired, enabling bias and absolute reliability measures to be calculated using Bland-Altman test of agreement. RESULTS Eleven studies met the inclusion criteria, which resulted in 29 isometric-dynamic change comparisons. The overall pooled effect was 0.13 in favor of dynamic testing; however, the prediction interval ranged from g = -0.49 to 0.75. There was no evidence of bias (P = .825) between isometric and dynamic tests; however, the reliability coefficient was estimated to be 16%, and the coefficient of variation (%) was 109.27. CONCLUSIONS As a range of future effects can be expected when comparing isometric to dynamic strength changes following resistance training, and limited proportionality exists between changes in these 2 strength qualities, there is strong evidence that isometric and dynamic strength represent separate neuromuscular domains. These findings can be used to inform strength-assessment models in athlete populations.
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Affiliation(s)
- Lachlan P James
- Department of Dietetics, Nutrition and Sport, Sport, Performance, and Nutrition Research Group, School of Allied Health, Human Services, & Sport, La Trobe University, Melbourne, VIC, Australia
| | - Jonathon Weakley
- School of Behavioral and Health Sciences, Australian Catholic University, Brisbane, QLD, Australia
- Sports Performance, Recovery, Injury and New Technologies (SPRINT) Research Center, Australian Catholic University, Brisbane, QLD, Australia
- Carnegie Applied Rugby Research (CARR) Centre, Carnegie School of Sport, Leeds Beckett University, Leeds, United Kingdom
| | - Paul Comfort
- Directorate of Psychology and Sport, University of Salford, Salford, United Kingdom
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA, Australia
| | - Minh Huynh
- Department of Dietetics, Nutrition and Sport, Sport, Performance, and Nutrition Research Group, School of Allied Health, Human Services, & Sport, La Trobe University, Melbourne, VIC, Australia
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Skopal LK, Drinkwater EJ, Behm DG. Application of mobility training methods in sporting populations: A systematic review of performance adaptations. J Sports Sci 2024; 42:46-60. [PMID: 38433623 DOI: 10.1080/02640414.2024.2321006] [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: 05/29/2023] [Accepted: 02/13/2024] [Indexed: 03/05/2024]
Abstract
This systematic review investigates influences of mobility training in sporting populations on performance outcomes. The search strategy involved Embase, MEDLINE Complete, Sports Discus and manual search from inception to March 2022. Mobility training studies with a minimum three-week, or 10-session duration in healthy sporting populations of any age were included. Twenty-two studies comprising predominantly young adult or junior athletes were analysed from 319 retrieved articles. Performance outcomes were strength, speed, change of direction, jumping, balance, and sport-specific skills. Fifteen studies randomized participants with only four indicating systematic allocation concealment and blinding of outcomes assessors in only one study. In 20 of 22 studies mobility training was of some benefit or helped to maintain sports performance to a larger degree than control conditions. Control conditions, which were generally no activity conditions, were primarily non-significant. The majority of evidence suggests that a range of mobility training methods may improve key sports performance variables or are unlikely to impair performance over time. Therefore, coaches can consider the potential benefits of including comprehensive mobility programmes with minimal risk of impairing performance. Higher-quality studies in homogenous populations are necessary to confirm performance changes.
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Affiliation(s)
- Lauren K Skopal
- Centre for Sport Research, School of Exercise and Nutrition Sciences, Deakin University, Burwood, Australia
| | - Eric J Drinkwater
- Centre for Sport Research, School of Exercise and Nutrition Sciences, Deakin University, Burwood, Australia
| | - David G Behm
- School of Human Kinetics and Recreation, Memorial University of Newfoundland, St. John's, Canada
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Piepoli A, Miras-Moreno S, Janicijevic D, Martínez-Amat A, García-Ramos A. Differences in Various Strength Manifestations Between the Flat and Retracted Bench Press Variants: Are They Affected by Subjects' Experience or Strength Levels? J Strength Cond Res 2023; 37:2339-2345. [PMID: 37815255 DOI: 10.1519/jsc.0000000000004561] [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: 10/11/2023]
Abstract
ABSTRACT Piepoli, A, Miras-Moreno, S, Janicijevic, D, Martínez-Amat, A, and García-Ramos, A. Differences in various strength manifestations between the flat and retracted bench press variants: are they affected by subjects' experience or strength levels? J Strength Cond Res 37(12): 2339-2345, 2023. The objective of this study was to explore the effect of retracting the scapulae during the free-weight bench press (BP) exercise on various strength manifestations and perceptual variables. Twenty-eight recreationally trained male lifters (BP 1-repetition maximum [1RM] = 96.1 ± 20.8 kg) randomly performed in 2 different sessions: the flat BP (scapulae free to move during the movement) and retracted BP (shoulders retracted during the movement). Three strength manifestations were evaluated: (a) explosive strength -mean velocity (MV) achieved against 3 submaximal loads (40, 60, and 80%1RM); (b) maximal strength -1RM; and (c) endurance strength -number of repetitions completed to failure against the 70%1RM. Discomfort and ratings of perceived exertion (RPE) values were also recorded immediately after completing each test. The upward displacement of the barbell was lower for the retracted BP compared with the flat BP at the 3 submaximal loads ( p ≤ 0.024), but no significant differences between the BP variants were observed for the MV at submaximal loads ( p ≥ 0.473), 1RM ( p = 0.147), number of repetitions completed to failure ( p = 0.447), RPE at submaximal loads ( p ≥ 0.363), or discomfort during any test ( p ≥ 0.611). Subjects always demonstrated a greater strength performance with the BP variant most used in their training programs, but the differences between the flat and retracted BP were not affected by subjects' maximal strength values ( p ≥ 0.162). These results suggest that retracting the scapulae during the BP exercise presents minor effects on different strength manifestations and perceptual measures of effort and discomfort.
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Affiliation(s)
- Antonio Piepoli
- Department of Health Sciences, Faculty of Health Sciences, University of Jaén, Jaén, Spain
| | - Sergio Miras-Moreno
- Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
| | - Danica Janicijevic
- University of Belgrade, Faculty of Sport and Physical Education, The Research Centre, Belgrade, Serbia
- Research Academy of Human Biomechanics, The Affiliated Hospital of Medical School of Ningbo University, Ningbo University, Ningbo, China
- Faculty of Sports Science, Ningbo University, Ningbo, China; and
| | - Antonio Martínez-Amat
- Department of Health Sciences, Faculty of Health Sciences, University of Jaén, Jaén, Spain
| | - Amador García-Ramos
- Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
- Department of Sports Sciences and Physical Conditioning, Faculty of Education, Universidad Católica de la Santísima Concepción, Concepción, Chile
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Geisler S, Havers T, Isenmann E, Schulze J, Lourens LK, Nowak J, Held S, Haff GG. Effects of Expertise on Muscle Activity during the Hang Power Clean and Hang Power Snatch Compared to Snatch and Clean Pulls - An Explorative Analysis. J Sports Sci Med 2023; 22:778-789. [PMID: 38045750 PMCID: PMC10690512 DOI: 10.52082/jssm.2023.778] [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: 08/06/2023] [Accepted: 11/13/2023] [Indexed: 12/05/2023]
Abstract
The purpose was to compare the electromyographic (EMG) activity of the Hang Power Clean (HPC) and Hang Power Snatch (HPS) with the Hang Clean Pull (HCP) and Hang Snatch Pull (HSP). Additionally, the influence of weightlifting expertise (beginner, advanced and elite) on EMG activity was analyzed. Twenty-seven weightlifters (beginner: n = 11, age: 23.9 ± 3.2 years, bodyweight: 75.7 ± 10.5 kg; advanced: n = 10, age: 24.8 ± 4.5 years, bodyweight: 69.4 ± 13.9 kg; elite: n = 6, age: 25.5 ± 5.2 years, bodyweight: 75.5 ± 12.5 kg) participated in this study. Participants performed two repetitions of HPC, HPS, HCP, and HSP at 50%, 70%, and 90% 1RM, respectively. The EMG activity of vastus lateralis (VL), gluteus maximus (GM), erector spinae (ES), rectus abdominis (RA) and trapezius (TZ) was recorded and normalized to the maximum voluntary isometric contraction (MVIC) of each muscle. There were significant differences in RA and ES EMG activity at 70% and 90% 1RM during HPC compared to HCP in the beginner group (p < 0.05, Hedges g = 0.50-1.06). Significant greater ES activity was observed in the beginner, advanced, and elite groups (p < 0.05, g = 0.27-0.98) during the HPS when compared to the HSP at 50-90% 1RM. TZ muscle activity was significantly greater at 50% and 70% 1RM in the HCP compared to the HPC in the elite group (p < 0.05, g = 0.61-1.08), while the beginner group reached significance only at 50% 1RM favoring HPC (p < 0.05, g = 0.38). Moreover, the EMG activity of the TZ during the HSP and HPS was significantly different only at 50% 1RM in the elite group and favored HSP (p < 0.05, g = 0.27). No differences were observed between the levels of weightlifting expertise. Based upon the results of this study, the overall pattern of EMG activity of the predominant muscles involved in HPC/HPS and the corresponding weightlifting pulling derivatives, apart from the stabilizing muscle (RA and ES), is similar at higher intensities (>70% 1RM) and expertise does not influence muscle activity.
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Affiliation(s)
- Stephan Geisler
- Department of Fitness and Health, IST-University of Applied Sciences, Dusseldorf, Germany
| | - Tim Havers
- Department of Fitness and Health, IST-University of Applied Sciences, Dusseldorf, Germany
| | - Eduard Isenmann
- Department of Fitness and Health, IST-University of Applied Sciences, Dusseldorf, Germany
- Department of Molecular and Cellular Sports Medicine, Institute for Cardiovascular Research and Sports Medicine, German Sports University, Cologne, Germany
| | - Jonas Schulze
- Department of Molecular and Cellular Sports Medicine, Institute for Cardiovascular Research and Sports Medicine, German Sports University, Cologne, Germany
| | - Leonie K Lourens
- Department of Molecular and Cellular Sports Medicine, Institute for Cardiovascular Research and Sports Medicine, German Sports University, Cologne, Germany
| | - Jannik Nowak
- Department of Molecular and Cellular Sports Medicine, Institute for Cardiovascular Research and Sports Medicine, German Sports University, Cologne, Germany
| | - Steffen Held
- Department of Intervention Research in Exercise Training, German Sport University Cologne, Cologne, Germany
- Department of Sport and Management, IST University of Applied Sciences, Duesseldorf, Germany
| | - G Gregory Haff
- School of Medical and Health Sciences, Centre for Human Performance, Edith Cowan University, Joondalup, Western Australia
- Directorate of Psychology and Sport, University of Salford, Salford, United Kingdom
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Barrenetxea-Garcia J, Gil SM, Esain I, Torres-Unda J. Relationship between strength training and shoulder pain in male and female water polo players. J Exerc Rehabil 2023; 19:345-356. [PMID: 38188131 PMCID: PMC10766445 DOI: 10.12965/jer.2346472.236] [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: 09/26/2023] [Accepted: 11/07/2023] [Indexed: 01/09/2024] Open
Abstract
The objective of this study was to assess the effect of two different strength-training methods on both male and female water polo players' performance and shoulder pain. The players were randomly allocated to a maximum strength (MS: 14 males, 8 females) or power strength (PS: 13 males, 8 females) training group. Before and after the intervention, we assessed player's anthropometric characteristics, shoulder internal and external rotation strength, hand grip strength, upper body strength, countermovement jump height, throwing velocity, swimming speed, shoulder pain on a visual analogue scale (VAS), wellness, and rate of perceived exertion per session. We observed no significant improvement (P<0.05) in specific skills but enhancement in hand grip strength in male players. In female players in the MS group, throwing speed and bench press weight decreased significantly (P<0.05). Shoulder external rotation strength at 240°/sec in male MS group players and shoulder external rotation strength at 60°/sec in female PS group players decreased significantly (P<0.05). In addition, from the first to the last week, shoulder pain increased significantly (P<0.05) in all players. Inverse correlations (P<0.05) were found between VAS and shoulder rotation strength in males in the PS group, and between wellness and shoulder internal rotation strength in men in the MS group and women in the PS group. We found that both MS and PS training did not enhance performance and increased shoulder pain in male and female water polo players.
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Affiliation(s)
- Josu Barrenetxea-Garcia
- Department of Physiology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Leioa,
Spain
| | - Susana M. Gil
- Department of Physiology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Leioa,
Spain
| | - Izaro Esain
- Department of Physiology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Leioa,
Spain
| | - Jon Torres-Unda
- Department of Physiology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Leioa,
Spain
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Anyadike-Danes K, Donath L, Kiely J. Coaches' Perceptions of Factors Driving Training Adaptation: An International Survey. Sports Med 2023; 53:2505-2512. [PMID: 37552460 PMCID: PMC10687123 DOI: 10.1007/s40279-023-01894-1] [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: 07/12/2023] [Indexed: 08/09/2023]
Abstract
OBJECTIVE We surveyed coaches' views on topics related to the training process to elucidate whether their opinions are aligned with the current literature. Here the results for a sub-set of questions regarding factors affecting the training adaptation process are presented and discussed. METHODS 106 coaches [age range 18-65 + years, 31% 15 + years coaching, 58% individual-events/sports and 32% international level] from a number of countries completed a novel cross-sectional online survey about the planning of training and the training process. RESULTS Only 28% of participants indicated that physical training was the most important factor in determining sport performance; whereas 99% indicated non-physical factors influence physical training response. The top five factors in modifying an athlete's ability to physically adapt to a training plan, as rated 'absolutely essential', were 'coach-athlete relationship' (56%), 'life stress' (41%), 'athletes' belief in the plan' (37%), 'psychological and emotional stress' (35%) and 'physical training' (33%). CONCLUSIONS Amongst coaches surveyed less than a third rated physical training as the most important factor in determining sports performance. Non-physical factors were acknowledged by the majority to exert an influence on physical training response and adaptation, despite the lack of discussion in training research, though there was no consensus on the relative importance of each individual factor. We echo previous sentiments that coaches need to be engaged in the research process. If training research continues as present the field runs the risk of not only becoming detached but increasingly irrelevant to those it is trying to help.
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Affiliation(s)
- Kechi Anyadike-Danes
- Department of Intervention Research in Exercise Training, German Sport University Cologne, Cologne, Germany.
| | - Lars Donath
- Department of Intervention Research in Exercise Training, German Sport University Cologne, Cologne, Germany
| | - John Kiely
- Faculty of Education and Health Sciences, University of Limerick, Limerick, Ireland
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Petré H, Ovendal A, Westblad N, Ten Siethoff L, Rosdahl H, Psilander N. Effect of the Intrasession Exercise Order of Flywheel Resistance and High-Intensity Interval Training on Maximal Strength and Power Performance in Elite Team-Sport Athletes. J Strength Cond Res 2023; 37:2389-2396. [PMID: 37389921 PMCID: PMC10671210 DOI: 10.1519/jsc.0000000000004556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/01/2023]
Abstract
Petré, H, Ovendal, A, Westblad, N, Ten Siethoff, L, Rosdahl, H, and Psilander, N. Effect of the intrasession exercise order of flywheel resistance and high-intensity interval training on maximal strength and power performance in elite team-sport athletes. J Strength Cond Res 37(12): 2389–2396, 2023—This study aimed to investigate the effect of intrasession exercise order of maximal effort flywheel resistance training (RT; 4 × 6 repetitions [rep]) and high-intensity interval training (HIIT, 2–4 × 8 rep of 20 second at 130% of Watt at V̇o 2max [wV̇o 2max]), on the development of maximal strength and power in elite team-sport athletes. A 7-week training intervention involving 2 training sessions per week of either HIIT followed by RT (HIIT + RT, n = 8), RT followed by HIIT (RT + HIIT, n = 8), or RT alone (RT, n = 7) was conducted in 23 elite male bandy players (24.7 ± 4.3 years). Power and work were continuously measured during the flywheel RT. Isometric squat strength (ISq), countermovement jump, squat jump, and V̇o 2max were measured before and after the training period. Power output during training differed between the groups (p = 0.013, η p 2 = 0.365) with RT producing more power than HIIT + RT (p = 0.005). ISq improved following RT + HIIT (∼80%, d = 2.10, p = 0.001) and following HIIT + RT (∼40%, d = 1.64, p = 0.005), and RT alone (∼70%, d = 1.67, p = 0.004). V̇o 2max increased following RT + HIIT and HIIT + RT (∼10%, d = 1.98, p = 0.001 resp. d = 2.08, p = 0.001). HIIT before RT reduced power output during RT in elite team-sport athletes but did not lead to blunted development of maximal strength or power after a 7-week training period. During longer training periods (>7-weeks), it may be advantageous to schedule RT before HIIT because the negative effect of HIIT + RT on training quality increased during the final weeks of training. In addition, the largest training effect on maximal strength was observed following RT + HIIT.
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Affiliation(s)
- Henrik Petré
- Department of Physiology, Nutrition and Biomechanics, The Swedish School of Sport and Health Sciences, Stockholm, Sweden
| | - Alexander Ovendal
- Department of Physiology, Nutrition and Biomechanics, The Swedish School of Sport and Health Sciences, Stockholm, Sweden
| | - Niklas Westblad
- Department of Physiology, Nutrition and Biomechanics, The Swedish School of Sport and Health Sciences, Stockholm, Sweden
| | - Lasse Ten Siethoff
- Department of Physiology, Nutrition and Biomechanics, The Swedish School of Sport and Health Sciences, Stockholm, Sweden
| | - Hans Rosdahl
- Department of Physiology, Nutrition and Biomechanics, The Swedish School of Sport and Health Sciences, Stockholm, Sweden
| | - Niklas Psilander
- Department of Physiology, Nutrition and Biomechanics, The Swedish School of Sport and Health Sciences, Stockholm, Sweden
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Augustsson SR, Gannby E. The Significance of Maximal Squat Strength for Neuromuscular Knee Control in Elite Handball Players: A Cross-Sectional Study. Sports (Basel) 2023; 11:236. [PMID: 38133103 PMCID: PMC10748350 DOI: 10.3390/sports11120236] [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: 10/29/2023] [Revised: 11/18/2023] [Accepted: 11/21/2023] [Indexed: 12/23/2023] Open
Abstract
Both weak muscle strength and impaired neuromuscular control has previous been suggested as risk factors for future traumatic knee injury. However, data on the relationship between these two factors are scarce. Thus, the aim of this study was to investigate the relationship and influence of the one repetition maximum (1RM) barbell squat strength on dynamic knee valgus in elite female and male handball players. In this cross-sectional study 22 elite handball players (7 females) were included. A unilateral drop jump (VDJ) test was used for the assessment of frontal plane dynamic knee valgus. Players also performed a one repetition maximum (1RM) barbell squat test, expressed relative to bodyweight (r1RM), to assess maximal strength, which were dichotomized to analyze 'weak' versus 'strong' players according to median. Correlations were noted between r1RM in squat and knee valgus angle for both the non-dominant (r = -0.54; p = 0.009) and dominant leg (r = -0.46, p = 0.03). The odds of knee valgus were eight times higher, for the dominant leg, in the weak group compared to the strong group (p = 0.03) and 27 times higher, for the non-dominant leg (p = 0.002). The outcome of the present study suggests that maximum squat strength plays an important role when it comes to neuromuscular control of the knee, and that weak handball players are at higher risk of knee valgus compared to strong players during jumping activity.
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Affiliation(s)
- Sofia Ryman Augustsson
- Department of Sport Science, Faculty of Social Sciences, Linnaeus University, 39231 Kalmar, Sweden;
| | - Erik Gannby
- Department of Sport Science, Faculty of Social Sciences, Linnaeus University, 39231 Kalmar, Sweden;
- Kry Health Center, 29535 Bromölla, Sweden
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TANAKA TSUKASA, KUBOTA ATSUSHI, OZAKI HAYAO, NISHIO HIROFUMI, NOZU SHOJIRO, TAKAZAWA YUJI. Effect of Isokinetic Training with Blood Flow Restriction During Rest Interval Versus Exercise on Muscle Strength, Hypertrophy, and Perception: A Pilot Study. JUNTENDO IJI ZASSHI = JUNTENDO MEDICAL JOURNAL 2023; 69:477-484. [PMID: 38855068 PMCID: PMC11153072 DOI: 10.14789/jmj.jmj23-0014-oa] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 09/07/2023] [Indexed: 06/11/2024]
Abstract
Objectives This study aimed to determine the effects of high-intensity isokinetic training with blood flow restriction during rest interval between set (rBFR) versus during exercise (eBFR) on muscle hypertrophy and increasing muscle strength and determine whether BFR-induced exercise pain is suppressed by rBFR. Materials and Methods Fourteen arms (7 participants) were recruited for the study. We conducted the following interventions for each arm: eBFR (n=4), rBFR (n=5), and exercise only (CON, n=5). The participants performed elbow flexion training with a BIODEX device twice weekly for 8 weeks. This study training consisted of total four sets; each was performed until <50% peak torque was achieved twice consecutively. BFR pressure was set at 120 mmHg. Elbow flexor peak torque during concentric contraction (CC), isometric contraction (IM), and muscle cross-sectional area (CSA) were measured before and after the intervention. Numerical rating scale scores used to assess pain during exercise were determined during training. Results Peak torque at the CC increased in the rBFR (p<0.05) and IM increased in the rBFR and CON (p<0.05), while CSA increased in the rBFR and CON (p<0.001). The pain during exercise was severe in the eBFR and moderate in the rBFR and CON. Conclusions This study's showed that high-intensity isokinetic training with rBFR did not have a synergistic effect on increasing muscle strength and muscle size. Additionally, high-intensity isokinetic training with BFR when it may be best not to perform it during exercise, because it was induces severe pain and may inhibit increases in muscle strength.
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Affiliation(s)
| | | | | | | | | | - YUJI TAKAZAWA
- Corresponding author: Yuji Takazawa, Department of Sports Medicine, Faculty of Medicine, Juntendo University, 2-3-15 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, TEL: +81-3-3813-3111 E-mail:
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