Application of velocity loss thresholds during free-weight resistance training: Responses and reproducibility of perceptual, metabolic, and neuromuscular outcomes. Issue 5 (3rd March 2020)

• Record Type: Journal Article
• Authors: Weakley, Jonathon; McLaren, Shaun; Ramirez-Lopez, Carlos; García-Ramos, Amador; Dalton-Barron, Nick; Banyard, Harry; Mann, Bryan; Weaving, Dan; Jones, Ben
• Is Part Of: Journal of sports sciences. Volume 38:Issue 5(2020)
• Page Start: 477
• Page End: 485
• Publication Date: 2020-03-03
• Subjects: Velocity-based training -- Countermovement Jump -- Lactate -- Rating of perceived exertion -- Reliability; Sports -- Periodicals; Sports -- Physiological aspects -- Periodicals; Sports -- Psychological aspects -- Periodicals; 612.044
• DOI: 10.1080/02640414.2019.1706831
• Languages: English
• ISSNs: 0264-0414

Abstract

ABSTRACT: The 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 (B[La], 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; B[La], 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.