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Acute Effects of Isometric Contraction Distribution on Jump Performance in Volleyball Players

Jonatan Helbin1, Dawid Gawel1, Artur Terbalyan1

  • 1Institute of Sport Sciences, Academy of Physical Education, 40-065 Katowice, Poland.

Journal of Functional Morphology and Kinesiology
|September 22, 2025
PubMed
Summary

Isometric conditioning activity (ICA) durations of 9s or 45s can enhance countermovement jump (CMJ) performance in volleyball players. Longer ICA durations, like 27s and 45s, showed greater CMJ improvements compared to shorter 9s protocols.

Keywords:
isometric squatpost-activation performance enhancementsports performancevertical jump

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