Párraga Montilla, Juan A.García Ramos, AmadorCastaño Zambudio, AdríanCapelo Ramírez, FernandoGonzález Hernández, Jorge M.Cordero Rodríguez, YaizaJiménez Reyes, Pedro2025-01-142025-01-142020-08Párraga-Montilla, J. A., García-Ramos, A., Castaño-Zambudio, A., Capelo-Ramírez, F., González-Hernández, J. M., Cordero-Rodríguez, Y., & Jiménez-Reyes, P. (2020). Acute and delayed effects of a resistance training session leading to muscular failure on mechanical, metabolic, and perceptual responses. The Journal of Strength & Conditioning Research, 34(8), 2220-2226.1064-801110.1519/JSC.0000000000002712https://journals.lww.com/nsca-jscr/fulltext/2020/08000/Acute_and_Delayed_Effects_of_a_Resistance_Training.15.aspx?casa_token=fKQ_hSAmBrUAAAAA:vFvBLpraOz1MFQggMoKnj1SK8XIMOv-kJTa8e5Xx1mJnY37lJvvUxWHhlA0eOd6tCyQt1Hmy2hD4T2gieGxMhttps://hdl.handle.net/10953/3923This 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−1 (≈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.engback squatjump heightmovement velocityvelocity-based traininginfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess