不同組數活化後增能運動與恢復時間對爆發力表現的影響

Purpose: To investigate the effects of isometric maximal voluntary contraction squat and bench press exercises (PAP exercises) of different exercise volumes (sets x contraction time) on upper and lower limb power performance at different recovery time points. Methods: Fourteen resistance-trained males were recruited and performed isometric squat and bench press PAP exercises under 7 different exercise volume treatments (1, 2, 3 sets of 3 seconds, and 1, 2, 3 sets of 5 seconds and control) using repeated measures and random designs. Participants performed the squat jump and bench throw before and 4 and 8 minutes after isometric PAP exercises and their upper and lower limb power performance was assessed by analyzing peak power, peak force and peak velocity of squat jump and bench throw. Lower limb power performance was assessed first followed by upper limb power performance, separated by 15 minutes of rest interval. Two-way repeated measures ANOVA was used to analyze the data. A significance level was set at p ? .05. Results: (only data regarding lower limb power performance were presented here) After PAP exercise, significant increases in peak power were observed in 1 set of 3 seconds (8 mins after exercise), 2 sets of 3 seconds (4 mins after exercise) and 3 sets of 5 seconds (4 and 8 mins after exercise) treatments (p < .05). Moreover, peak power at 4 mins after PAP exercise was significantly greater in 2 sets of 3 seconds (4,063 ± 535 W) and 3 sets of 3 seconds (4,089 ± 639 W) treatments when compared with control treatment (2.09 ± 0.10 m/s). However, there were no significant differences in peak force among all treatments and recovery times. Regarding to peak velocity, significant increases after PAP exercise were observed in 1 set of 3 seconds and 3 sets of 5 seconds (4 and 8 mins after exercise), 2 sets of 3 seconds (4 mins after exercise), and 3 sets of 3 seconds (8 mins after exercise) treatments (p < .05). In addition, peak velocity at 8 mins after exercise was also significantly greater in 3 sets of 3 seconds treatment (2.19 ± 0.15 m/s) than in control treatment (2.09 ± 0.10 m/s). Conclusion: Our results suggest that the optimal sets may be different when matching with different contraction time in order to significantly trigger PAP phenomenon.