Effects of velocity loss during resistance training on athletic performance, strength gains and muscle adaptations
Fernando Pareja-Blanco,David Rodríguez-Rosell,Luis Sánchez-Medina,Joaquin Sanchis-Moysi,Cecilia Dorado,Ricardo Mora-Custodio,Juan Manuel Yáñez-García,David Morales-Alamo,Ismael Perez-Suarez,Jose A. L. Calbet,Juan José González-Badillo +10 more
TLDR
The progressive accumulation of muscle fatigue as indicated by a more pronounced repetition velocity loss appears as an important variable in the configuration of the resistance exercise stimulus as it influences functional and structural neuromuscular adaptations.Abstract:
We compared the effects of two resistance training (RT) programs only differing in the repetition velocity loss allowed in each set: 20% (VL20) vs 40% (VL40) on muscle structural and functional adaptations. Twenty-two young males were randomly assigned to a VL20 (n = 12) or VL40 (n = 10) group. Subjects followed an 8-week velocity-based RT program using the squat exercise while monitoring repetition velocity. Pre- and post-training assessments included: magnetic resonance imaging, vastus lateralis biopsies for muscle cross-sectional area (CSA) and fiber type analyses, one-repetition maximum strength and full load-velocity squat profile, countermovement jump (CMJ), and 20-m sprint running. VL20 resulted in similar squat strength gains than VL40 and greater improvements in CMJ (9.5% vs 3.5%, P < 0.05), despite VL20 performing 40% fewer repetitions. Although both groups increased mean fiber CSA and whole quadriceps muscle volume, VL40 training elicited a greater hypertrophy of vastus lateralis and intermedius than VL20. Training resulted in a reduction of myosin heavy chain IIX percentage in VL40, whereas it was preserved in VL20. In conclusion, the progressive accumulation of muscle fatigue as indicated by a more pronounced repetition velocity loss appears as an important variable in the configuration of the resistance exercise stimulus as it influences functional and structural neuromuscular adaptations.read more
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Effect of Resistance-Training Programs Differing in Set Configuration on Maximal Strength and Explosive-Action Performance
Jesualdo Cuevas-Aburto,Ivan Jukic,Jorge M González-Hernández,Danica Janicijevic,Paola Barboza-González,Luis Javier Chirosa-Ríos,Amador García-Ramos +6 more
TL;DR: Resistance-training programs based on not-to-failure traditional and rest redistribution set configurations induce similar changes in BP1RM, BPT30, and handball throwing velocity.
Journal ArticleDOI
Exploring the minimum ergogenic dose of caffeine on resistance exercise performance: A meta-analytic approach.
TL;DR: In this paper , the minimum effective caffeine dose has not yet been thoroughly examined in the literature, and a review aimed to explore the minimum ergogenic dose of caffeine on resistance exercise outcomes, such as muscular strength, endurance, and velocity, using a meta-analytic approach.
Journal ArticleDOI
Load-Velocity Relationship Variables to Assess the Maximal Neuromuscular Capacities During the Back-Squat Exercise
Alejandro Pérez-Castilla,Ivana Maršan Jukić,Danica Janicijevic,Zeki Akyildiz,Deniz Senturk,Amador García-Ramos +5 more
TL;DR: In this article , the relationship between the external load lifted and movement velocity can be modeled by a simple linear regression, and the variables derived from the load-velocity (L-V) relationship were recently used to estimate the maximal neuromuscular capacities during two variants of the back-squat exercise.
Journal ArticleDOI
Changes in EMG and movement velocity during a set to failure against different loads in the bench press exercise.
TL;DR: In this article, the pectoralis major (PM) and triceps brachii (TB) muscles were examined during the bench press exercise to failure against different loads, including low (40-1 repetition maximum-RM), moderate (60-1RM), and heavy loads (80%-1RM).
Journal ArticleDOI
Is the diurnal variation in muscle force output detected/detectable when multi-joint movements are analysed using the musclelab force-velocity encoder?
Colin M. Robertson,Samuel A. Pullinger,William R. Robinson,Mathew E. Smith,Jatin G. Burniston,Jim Waterhouse,Ben Edwards +6 more
TL;DR: Diurnal variation in back squat and bench press was shown and the tPV in complex multi-joint movements occurs earlier during the concentric phase of exercise when back squat or bench press is performed in the evening compared to the morning; this difference can be detected using a low cost, portable and widely available commercial instrument.
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