Effect of volume on eccentric overload-induced postactivation potentiation of jumps


Purpose: To investigate the post-activation potentiation (PAP) effects of different eccentricoverload (EOL) exercise volumes on countermovement jump (CMJ) and standing long jump (LJ) performance. 89 Methods: Thirteen male university soccer players participated in a cross over design study following a familiarization period. Control (no PAP) CMJ and LJ performances were recorded, and three experimental protocols were performed in a randomized order: 1, 2 or 3 sets of 6 repetitions of flywheel EOL half-squats (inertia=0.029 kg·m2). Performance of CMJ and LJ were measured at 3 and 6 min following all experimental conditions. The time course and magnitude of the PAP were compared between conditions. Results: Meaningful positive PAP effects were reported for CMJ after 2 (Bayes factor [BF10]=3.15, moderate) and 3 (BF10=3.25, moderate) sets but not 1 set (BF10=2.10, anecdotal). Meaningful positive PAP effects were reported for LJ after 2 (BF10=3.05, moderate) and 3 (BF10=3.44, moderate) sets but not 1 set (BF10=0.53, anecdotal). Two and three set protocols resulted in meaningful positive PAP effects on both CMJ and LJ after 6 but not 3 min. Conclusion: This study reported beneficial effects of multiple-set eccentric overload exercise over a single set. A minimum of two sets of flywheel EOL half-squats are required to induce PAP effects on CMJ and LJ performance of male university soccer players. Rest intervals of around 6 min (greater than 3 min) are required to maximize the PAP effects via multiple sets of EOL exercise. However, further research is needed to clarify the optimal EOL protocol configurations for PAP response.

In International journal of sports physiology and performance