AUTHOR=João Gustavo A. , Almeida Gustavo P. L. , Tavares Lucas D. , Kalva-Filho Carlos Augusto , Carvas Junior Nelson , Pontes Francisco L. , Baker Julien S. , Bocalini Danilo S. , Figueira Aylton J. 

TITLE=Acute Behavior of Oxygen Consumption, Lactate Concentrations, and Energy Expenditure During Resistance Training: Comparisons Among Three Intensities

JOURNAL=Frontiers in Sports and Active Living

VOLUME=Volume 3 - 2021

YEAR=2021

URL=https://www.frontiersin.org/journals/sports-and-active-living/articles/10.3389/fspor.2021.797604

DOI=10.3389/fspor.2021.797604

ISSN=2624-9367

ABSTRACT=The present study aimed to compare the oxygen consumption, lactate concentrations, and energy expenditure using three different intensities during the resistance training sessions. METHODS: Fifteen males (22.9 ± 2.61 years) experienced in resistance training underwent three sessions composed of eight exercises (chest press, pec deck, squat, lat pull-down, biceps curl, triceps extension, hamstring curl, and crunch machine), which were applied in the same order. The weight lifted differed among the sessions (high-session: six sets of five repetitions at 90% of 1-RM; intermediary-session: three sets of ten repetitions at 75% of 1-RM; and low-session: two sets of fifteen repetitions at 60% of 1-RM). The oxygen consumption (V̇O2) – during and after (EPOC) the session – blood lactate, and energy expenditure (i.e., the sum of aerobic and anaerobic contributions, respectively) were assessed. RESULTS: the V̇O2 significant decreased in the function of the weight lifting (F(2.28) = 17.02; p < 0.01; ηG2 = 0.32). However, the aerobic contributions significantly increase in function of the weight lifting (F(2.28) = 79.18; p < 0.01; ηG2 = 0.75). The anaerobic contributions were not different among the sessions (p > 0.05; ηG2 < 0.01). Thus, the total energy expenditure during the session (kcal) significantly increased in function of the weight lifting (F(2.28) = 86.68 p < 0.01; ηG2 = 0.75). The energy expenditure expressed in time unit (kcal·min-1) was higher in low-session session than in high-session (F(2.28) = 6.20; p < 0.01; ηG2 = 0.15). CONCLUSION: The weight lifted during resistance training induced different physiological responses, which induced higher energy expenditure per unit of time during low-session.