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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.

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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.

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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.