Application of velocity loss thresholds during free-weight resistance training: Responses and reproducibility of perceptual,metabolic, and neuromuscular outcomes |
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| Authors: | Jonathon Weakley Shaun McLaren Carlos Ramirez-Lopez Amador García-Ramos Nick Dalton-Barron Harry Banyard |
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| Institution: | 1. School of Behavioural and Health Sciences, Australian Campus University, Brisbane, Australia;2. Carnegie Applied Rugby Research (CARR) centre, Institute for Sport, Physical Activity and Leisure, Leeds Beckett University, Leeds, UKj.j.weakley@leedsbeckett.ac.uk https://orcid.org/0000-0001-7892-4885
@JonathonWeakle1;6. Carnegie Applied Rugby Research (CARR) centre, Institute for Sport, Physical Activity and Leisure, Leeds Beckett University, Leeds, UK;7. England Performance Unit, The Rugby Football League, Leeds, UK;8. Yorkshire Carnegie Rugby Club, Headingley Carnegie Stadium, Leeds, UKhttps://orcid.org/0000-0003-1605-3484;9. Department of Sports Sciences and Physical Conditioning, Faculty of Education, CIEDE, Catholic University of Most Holy Concepción, Concepción, Chile;10. Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spainhttps://orcid.org/0000-0003-0608-8755;11. England Performance Unit, The Rugby Football League, Leeds, UKhttps://orcid.org/0000-0002-8476-3042;12. Department of Health and Medical Sciences, Swinburne University of Technology, Melbourne, Australia |
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| Abstract: | ABSTRACTThe aim of this study was to investigate the differences and long-term reliability in perceptual, metabolic, and neuromuscular responses to velocity loss resistance training protocols. Using a repeated, counterbalanced, crossover design, twelve team-sport athletes completed 5-sets of barbell back-squats at a load corresponding to a mean concentric velocity of ~0.70 m·s?1. On different days, repetitions were performed until a 10%, 20% or 30% velocity loss was attained, with outcome measures collected after each set. Sessions were repeated after four-weeks. There were substantial between-protocol differences in post-set differential ratings of perceived exertion (dRPE, i.e., breathlessness and leg muscles, AU) and blood lactate concentration (BLa], mmol·L?1), such that 30%>20%>10% by small to large magnitudes. Differences in post-set countermovement jump (CMJ) variables were small for most variables, such that 30%<20%<10%. Standard deviations representing four-week variability of post-set responses to each protocol were: dRPE, 8–11; BLa], 0.8–1.0; CMJ height, 1.6–2.0; CMJ PPO, 1.0–1.8; CMJ PCV, 0.04–0.06; CMJ 100ms-Impulse, 5.7–11.9. Velocity loss thresholds control the magnitude of perceptual, metabolic, and neuromuscular responses to resistance training. For practitioners wanting to reliably prescribe training that can induce a given perceptual, metabolic, or neuromuscular response, it is strongly advised that velocity-based thresholds are implemented. |
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| Keywords: | Velocity-based training Countermovement Jump Lactate Rating of perceived exertion Reliability |
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https://orcid.org/0000-0001-7892-4885;6. Carnegie Applied Rugby Research (CARR) centre, Institute for Sport, Physical Activity and Leisure, Leeds Beckett University, Leeds, UK;7. England Performance Unit, The Rugby Football League, Leeds, UK;8. Yorkshire Carnegie Rugby Club, Headingley Carnegie Stadium, Leeds, UK