BIOMECHANICAL STUDY OF LANDING MOTION ON A SPRING SURFACE

Abstract

The purposes of this study were to compare landing motion on a spring surface and that on the ground, and to consider about how to change the landing motion by changing the landing surface. Subjects performed drop landing motion on a force platform (DL) and drop landing motion on a spring surface (DLS) from the top of a box. The ground reaction force of DLS changed greatly up and down like a sign wave. The joint angular velocities of the lower extremity for DLS changed greatly up and down. In particular, the angular velocity of the knee joint was greater than those of other joints. The peak ground reaction forces were absorbed many times after the first peak ground reaction force. Since angular velocity after LOW was the highest in the knee joints compared with the other joints, it was suggested that ground reaction force was mainly absorbed by the knee joint.