Influence of lower extremity strength and recovery time after load training on post-activation potentiation
【Abstract】Purpose: The aim of this study was to determine the effect of recovery time and strength quality on post-activation potentiation (PAP). Methods: Twenty-three male college students were recruited and divided into L group (1 RM / body weight > 2) and S group (1 RM / body weight ≤ 2). PAP was induced by half back-squat of five repetitions at 90% of 1 RM with 1 min interval. Jumping height, peak power, peak impulse, and rate of force development were measured every 4 min before and after PAP. The effect of recovery time on these parameters was analyzed by repeatedly measured analysis of variance (ANOVA), and the effect of lower extremity strength on these parameters was analyzed by multivariate analysis of variance. Results: The effect of recovery time on PAP is significant, embodied in peak power (P < 0.05). Peak power at 4 min and 8 min after PAP was higher than that at baseline (P < 0.008), other parameters did not change (P > 0.05). There was no difference between L and S groups. Conclusions: Explosive force is improved at 4 min and 8 min after load half back-squat of five repetitions at 90% of 1 RM with 1 min interval. Lower extremity strength does not affect PAP. The improvement effect of PAP on explosive force of lower extremity is individually different.
【Keywords】 post-activation potentiation; explosive force; recovery time; lower extremity strength; counter movement jump;
(Translated by LI Mingjiang)
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