Evaluation of physical properties by using a multi-degree-of freedom model

(Effect on physical properties of floor ones)

Abstract

In this study, we evaluated the running motion and the physical characteristics of body under the various floor condition. We measured, firstly, the running motion under three floor conditions, i.e., the rigid floor, one mat on the floor and two mats on the floor. From the measurement results, it was confirmed that the running motion did not change significantly due to the change of floor condition. Next, we simulated the running motion based on the multi-degree-of-freedom model whose parameters were identified such as to agree with the measured running motion. As the simulation results, it was shown that the rigidity of the hip joint became bigger in the case of running on one mat or two mats compared with the case of rigid floor.