投球における球速と正確性の協調に関する曲率中心を用いた力学解析

抄録

Speed and accuracy are both critical to sports performance but remains poorly understood. In baseball pitching, both ball speed and accuracy must be constrained by human body and ball dynamics. This study examines the dynamics of pitching control ability that coordinates ball speed and control using the center of curvature of trajectories of ball and shoulder joint. Dynamics analysis based on a variable-length pendulum model with the center of curvature of the ball and shoulder joint trajectories reveals that the control of shoulder acceleration affects the coordination of ball speed and pitch control.