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

Kevin L. De Keijzer, Stuart A. McErlain-Naylor, Antonio Dello Iacono, Marco Beato

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Abstract

Purpose
To investigate the post-activation potentiation (PAP) effects of different eccentric overload (EOL) exercise volumes on countermovement jump (CMJ) and standing long jump (LJ) performance.

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.
Original languageEnglish
Number of pages6
JournalInternational Journal of Sports Physiology and Performance
Early online date2 Mar 2020
DOIs
Publication statusE-pub ahead of print - 2 Mar 2020

Keywords

  • strength
  • training
  • flywheel
  • squat
  • Bayesian statistics

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