Article Dans Une Revue Journal of Applied Biomechanics Année : 2025

How Does Push-Off Distance Influence Force–Velocity Profile and Performance During Vertical Jumping?

Résumé

In many sports, practitioners must reach their maximal jump height ( h max ) under time constraints. This requires a reduction of the countermovement depth and so of the push-off distance ( h PO ). The purpose of this study was to investigate how h PO influences force–velocity ( F – v ) profiles ( , , , and S Fv ) and performance. Eleven participants (age: 26 [5] y, height: 175.6 [11.2] cm, mass: 76 [15] kg; squat 1RM: 129 [34] kg) performed maximal countermovement jumps. Kinetic and kinematic measurements were used to assess individual F – v profiles for 3 different h PO conditions ( h PO-SMALL , h PO-MEDIUM , h PO-LARGE ) from countermovement jumps performed under different load conditions (bodyweight [BW], BW + 8 kg, BW + 17 kg, BW + 40%1RM, BW + 70%1RM). Results indicated that and changed across h PO conditions, while remained constant. A lower h PO led to a significantly higher and . These changes resulted in a steeper S Fv leading to a more force-oriented profile, a lower optimal S Fv and a greater F – v imbalance. Reducing h PO and modifying F – v profile led, to some extent, to a reduction in h max . Performance is a compromise between h PO , , and F – v imbalance, all influenced by countermovement depth. This explains why reducing countermovement depth to meet time constraint may lower performance.

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Dates et versions

hal-04950558 , version 1 (16-02-2025)

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Félicie Pommerell, Sébastien Boyas, Pierre Samozino, Baptiste Morel, Jérémie Begue, et al.. How Does Push-Off Distance Influence Force–Velocity Profile and Performance During Vertical Jumping?. Journal of Applied Biomechanics, 2025, pp.1-6. ⟨10.1123/jab.2024-0194⟩. ⟨hal-04950558⟩
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