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Intraindividual movement variability within the 5 m water polo shot
Paul G Taylor1, Raul Landeo, Jennifer Coogan
1School of Exercise Science, Australian Catholic University, Australia.
Journal of Applied Biomechanics
|December 19, 2013
Summary
Water polo players exhibit distinct arm movement variability during shots. While release height and velocity show low variability, the release angle is highly variable, impacting shot success.
Area of Science:
- Biomechanics
- Sports Science
- Motor Control
Background:
- Water polo performance relies on precise throwing mechanics.
- Understanding movement variability is crucial for optimizing technique and preventing injuries.
Purpose of the Study:
- To investigate the variability in throwing arm and ball release parameters during water polo shots.
- To compare this variability between successful (hit) and unsuccessful (miss) shots.
Main Methods:
- Seven subelite female water polo players performed 10 penalty shots each.
- Calculated intraindividual coefficient of variation percentage (CV%) for joint angles, velocities, and ball release parameters.
- Assessed coordination variability using cross-correlation of elbow and wrist movements.
Main Results:
- Elbow and wrist displacement variability initially decreased then increased towards release.
- Wrist linear velocity variability decreased as the throw progressed.
- Ball release height and velocity showed low variability (<12%), while release angle variability was high (>27%).
Conclusions:
- The elbow and wrist contribute to stable ball release height and velocity.
- High variability in release angle suggests it's a key factor for future study in water polo.
- Optimal levels of movement variability for water polo performance require further investigation.
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