Application of velocity loss thresholds during free-weight resistance training: Responses and reproducibility of perceptual, metabolic, and neuromuscular outcomes
Date
2019-12-22Author
Weakley, Jonathon
McLaren, Shaun
Ramirez-Lopez, Carlos
García-Ramos, Amador
Dalton Barron, Nicholas
Banyard, Harry
Mann, Bryan
Weaving, Dan
Jones, Ben
Publisher
RoutledgeDescription
Artículo de publicación ISIMetadata
Show full item recordAbstract
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.