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Intraindividual movement variability within the 5 m water polo shot
Taylor, Paul G. Landeo, Raul Coogan, Jennifer
Taylor, Paul G.
Landeo, Raul
Coogan, Jennifer
Abstract
The purpose of this study was to explore movement variability of throwing arm and ball release parameters during the water polo shot and to compare variability between successful (hit) and unsuccessful (miss) outcomes. Seven injury free, subelite, females completed 10 trials of the 5 m water polo penalty shot. Intraindividual coefficient of variation percentage (CV%) values were calculated for elbow and wrist angular displacement, wrist linear velocity and ball release parameters (height, angle and velocity). Coordination variability (elbow/wrist angular displacement) was calculated as the CV% of the mean cross-correlation coefficient. Elbow and wrist displacement variability decreased to 80% of throwing time then increased toward release. Wrist linear velocity variability reduced toward release. Individual CV% values ranged between 1.6% and 23.5% (all trials), 0.4% and 20.6% (hit), and 0.4% and 27.1% (miss). Ball release height and velocity variability were low ( < 12%; all trials) whereas release angle variability was high ( > 27%; all trials). Cross-correlation results were inconclusive. Roles of the elbow and wrist in production of stable ball release height and velocity and control of the highly variable release angle in the water polo shot are discussed and suggested for further study. Optimal levels of variability warrant future investigation.
Keywords
coordination, cross-correlation, variance, coefficient of variation, movement outcome
Date
2014
Type
Journal article
Journal
Journal of Applied Biomechanics
Book
Volume
30
Issue
3
Page Range
477-482
Article Number
ACU Department
School of Behavioural and Health Sciences
Faculty of Health Sciences
Faculty of Health Sciences
Relation URI
Source URL
Event URL
Open Access Status
Published as green open access
License
File Access
Controlled
Open
Open
Notes
This record includes an authors accepted manuscript - as accepted for publication. © 2014 Human Kinetics, Inc.