Acute and Delayed Effects of a Resistance Training Session Leading to Muscular Failure on Mechanical, Metabolic, and Perceptual Responses.
Autor: Párraga-Montilla, Juan A.; García-Ramos, Amador; Castaño-Zambudio, Adrián; Capelo-Ramírez, Fernando; González-Hernández, Jorge M.; Cordero-Rodríguez, Yaiza; Jiménez-Reyes, Pedro
Publication year: 2020
Journal of strength and conditioning research
issn:1533-4287 1064-8011
doi: 10.1519/JSC.0000000000002712
Abstract:
Párraga-Montilla, JA, García-Ramos, A, Castaño-Zambudio, A, Capelo-Ramírez, F, González-Hernández, JM, Cordero-Rodríguez, Y, and Jiménez-Reyes, P. Acute and delayed effects of a resistance training session leading to muscular failure on mechanical, metabolic, and perceptual responses. J Strength Cond Res 34(8): 2220-2226, 2020-This study explored the acute and delayed (24 and 48 hours after exercise) effects of a resistance training session leading to muscular failure. Eleven resistance-trained men completed a training session consisting on 3 sets of repetitions to failure during the back-squat exercise performed at the maximum possible speed with a load equivalent to a mean propulsive velocity (MPV) of 1 m·s (≈60% of 1 repetition maximum). A number of mechanical (number of repetitions and starting MPV of the set, MPV achieved against the 1MPV load, countermovement jump [CMJ] height, and handgrip strength), metabolic (lactate, uric acid, and ammonia concentrations), and perceptual (OMNI-RES perceived exertion) variables were measured. The results revealed (a) a decrease of 38.7% in set 2 and 54.7% in set 3 of the number of repetitions performed compared with the first set (p < 0.05), (b) a reduction in the MPV of the repetitions and an increase in lactate concentration and OMNI-RES values with the succession of sets (p < 0.05), (c) comparable decrements in CMJ height after the 3 sets (25-32%), (d) a decrease in CMJ height (p < 0.05; 6.7-7.9%) and in the MPV attained against the 1MPV load (p < 0.05; 13-14%) after 24 and 48 hours of completing the training session, but no significant changes were observed in handgrip strength (p > 0.05; <2%), and (e) uric acid and ammonia concentrations above the basal levels (p < 0.05). The large decrements in mechanical performance together with the high metabolic stress discourage the frequent use of resistance training sessions leading to muscular failure. Language: eng Rights: Pmid: 29952872 Tags: Humans; Male; Adult; Adolescent; Time Factors; Young Adult; Muscle Strength/*physiology; Muscle, Skeletal/*physiology; Resistance Training/*methods; Posture; Lactic Acid/blood; Hand Strength; Ammonia/blood; Muscle Fatigue/*physiology; Uric Acid/blood Link: https://pubmed.ncbi.nlm.nih.gov/29952872/
