Characterizing different loads with the same velocity loss percentage in the bench press throw exercise
DOI:
https://doi.org/10.47197/retos.v61.106268Keywords:
Salivary cortisol, Velocity-based resistance training, Fatgiue, Bench pressAbstract
Velocity loss has been recognized as an effective fatigue index in resistance training. However, the physiological consequences of this fatigue should be described. Traditionally, researchers have debated the hormonal response to non-failure resistance training. Cortisol on salivary concentration was one of the hormones under study, which is linked to the inflammatory process from exercise. This study aimed to compare the acute salivary cortisol (Sal-C) response at different percentages of 1RM with fatigue standardized by a 10% velocity loss. An experimental, randomized, and counterbalanced activity was designed. Fifteen men took part in the study (they fasted for 12 hours before carrying out the test), performing 6 sets of bench press throw with different 1RM percentages (30% - 90% 1RM). Salivary Cortisol was collected before and after each test. Velocity loss was measured by a linear encoder. ANOVA and Effect Size were performed. Sal-C showed a significant decrease in all percentages and effect size was greater with low loads (1.61 high) than with high loads (0.95-1 moderate). Peak power was significantly higher between 40-70% of 1RM compared to other percentages (30-80% 1RM). The results of this research support the idea that velocity-based training sustains the dynamic equilibrium of organisms independently of intensity training. Moreover, untrained subjects could perform efficiently up to six sets at all percentages but with fewer repetitions at higher intensities, as this study shows that untrained subjects achieved 10% velocity loss under four repetitions.
Keywords: Salivary Cortisol; Velocity-based resistance training; Fatigue; Bench press. Caracterización de diferentes cargas con el mismo porcentaje de pérdida de velocidad en el ejercicio de lanzamiento de press de banca.
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