Motion Analysis of Windmill Pitching in Softball by Motion Capture

Abstract

The purpose of this study is to verify the effect of raising the opposite side of the dominant arm of windmill pitching in softball. We measured the windmill pitching by using an optical motion-capture system. The speed of the dominant wrist, twisting of the wrist, speed of leg drawing, and the rotation angle and speed of the waist were calculated as physical feature values. The feature values of normal pitching are compared with those of pitching without raising the opposite side of the dominant arm.