日本陸上競技学会

木越 清信、福地 修也、杉浦 澄美、柾木 拓、松井 泰誠

Vol.24, 2026

This study aimed to examine, through a case-based analysis, the hypothesis that the transformation of the velocity vector angle during takeoff in high jump and long jump is achieved through a casting-type movement characterized by temporally staggered segmental rotations. The high jump subject was a male athlete with a personal best of 2.10 m, and the analyzed trial was a successful attempt at 2.10 m. The long jump subject had a personal best of 7.69 m, and the analyzed performance measured 7.52 m. Kinematic analysis revealed that the thigh, shank, and foot segments of the takeoff leg each rotated forward with distinct temporal phases. This sequential segmental rotation contributed to the acquisition of vertical velocity of the whole-body center of mass. In particular, vertical velocity was primarily generated by the shank during the early phase of takeoff and by the thigh in the latter phase. These findings suggest that the takeoff action in high jump and long jump is characterized by the thigh and shank rotating forward asynchronously, enabling effective redirection of velocity.