The objective of this study is to explore the relaitonship betwenn bent-arm throw and tennis serve performance. Young players (9-12 years) will be assessed at the beginning of the season and at mid-season to measure the accuracy, the speed and the gesture of tennis serve. During a mid-season, they will have to perform a bent-arm throw warm-up program 5 minutes before each training session to increase their ability to throw.
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Serve velocity
Timeframe: change between the beginning and the end of the season (6 months)
Serve precision
Timeframe: change between the beginning and the end of the season (6 months)
Serve bidimensional movement
Timeframe: change between the beginning and the end of the season (6 months)