The purpose of the present study was to compare the oxygen uptake ( VO2) behavior in response to a resistance exercise (RE) session with aim of hypertrophy (HP) with another session with aim of local muscular endurance (LME). Nine young men (23.1± 2.1 years) voluntarily participated in the present study. Dynamic muscle strength was measured with one repetition maximum test (1RM). O VO2 was collected at rest and ten minutes after exercise with a gas analyzer (CPX/D). The RE protocols were composed of one upper body exercise (bench press) and one lower body exercise (squat) with the execution of 3 sets of 6-8 maximum repetitions (RM) with 80% of 1RM in HP session and 3 sets of 15-20 RM with 55% of 1 RM in LME session. Exercise post oxygen consumption (EPOC), energy cost (EC) and time constant (TC) of VO2 were analyzed. The results showed that both RE sessions provoked significant elevated VO2 after RE in comparison to rest values. There were no differences between groups in the EPOC (l) (HP: 2.21 ± 0.54 vs. LME: 2.60 ± 0.44), EC (Kcal) (HP: 10.36 ± 2.53 vs LME: 12.18 ± 2.04) and TC of VO2 (s) (HP: 56 ± 7 vs. LME: 57 ± 6) (p>0.05). These results demonstrated that a RE session with the aim of LME gain is capable of causing similar metabolic impact to the RE session with HP aim, even if it is performed at lower intensity concerning maximal load.
muscle hypertrophy; local muscular endurance; EPOC; energy cost; VO2 kinetics
