The effect of racquet swing weight on serve kinematics in elite adolescent female tennis players.

摘要: a b s t r c Objectives: Collision models for hitting implements denote how ball speed and swing weight increase proportionally when impact location are held constant. The biomechanical effects of interventions less understood. This study examined the on serving arm mechanics, racquet kinematics, in tennis serve. Design: Repeated measures design, where parameters distinguished between serve conditions. Methods: Eleven elite adolescent female players performed serves three conditions: (1) regular, unperturbed racquet; (2) 5% weight; (3) 10% weight. A 500 Hz Vicon motion analysis system captured three-dimensional arm, kinematics. Results: When was increased, peak shoulder internal rotation wrist flexion velocities during forwardswing both decreased. accelerations rotation, elbow extension also appeared to share an inverse relationship with As shifted significantly closer tip resultant at Ball remained similar all Conclusions: assumptions underlying collision model appear be violated by intervention sample players. Consequently, added fails effect faster serves. From dynamical systems perspective, inherent response movement deserves consideration prior to, during, administration