Effects of static and dynamic stretching on lower-limb kinematics and dynamics during the concentric phase in amateur volleyball players

Abstract

The purpose of this study was to assess the effects of a 6-week, dynamic versus a static stretching, (3×/week), on lower-limb kinematics and dynamics characteristics, in former amateur volleyball players. Methods: Randomized controlled trial with 42 healthy physical education students (age: 21.48±1.85 years, height: 1.82±0.06 m, mass: 81.23±9.31 kg and training age: 8.15±3.17 y). Groups: dynamic stretching (DS), static stretching (SS), control (CG). Pre/post isokinetic dynamometry (max concentric force) at Neuromechanics Lab, of the Department of Physical Education and Sports Science of the University of Serres. Kinematics: APAS, dynamics: Bioware/Bioanalysis. Data analysis: Repeated-measures ANOVA, t-tests (p≤0.05). Results: CG unchanged. DS/SS improved flexibility at maximum concentric force (p<0.05). DS uniquely reduced time-topeak concentric force (p<0.05); SS inert dynamically. Conclusion: Both DS/SS enhance flexibility, DS superior for dynamic traits (3×/week, 6 wk). Dynamic stretching recommended for volleyball performance optimization.