Abstract
The purpose of this study was to investigate the influence on post-activation potentiation (PAP) by performing isotonic muscle contraction using representative squat in resistance exercise. Subjects in this study were eight healthy male college students with training experience. In order to verify the effect of PAP, a counter movement jump (CMJ) was performed before and after the back-full squat (30%1RM× 3sets × 6reps, 60%1RM× 3sets×3reps, 90%1RM×3sets×2reps), and jump height, peak power, peak velocity, mean power, mean velocity were measured and analyzed. As a result, CMJ jump height (ES=0.68, 0.63), peak power (ES=0.80, 0.96), peak velocity (ES=1.03, 0.60) showed significantly high values after 60% and 90%1 RM conditions.
This suggests that performing several sets of isotonic muscle contraction using medium and high intensity squats induce PAP and it can be an effective means as training to emphasize improvement of maximum power and speed.
