長距離走行を考慮したシューズ機能設計

抄録

In long distance running, increase of injury risk has been reported due to change of running form associated with muscle fatigue. In the designing process of running shoes, it is necessary to clarify the required functions considered these changes. The purpose of this study is to design functional running shoes to adapt long distance running based on the motion analyses. Ground reaction force and 3 dimensional motion data during long distance running were measured by using a force plate and a motion capture system, respectively. In comparison of fresh and fatigued conditions, higher loading rate (LR) and larger heel eversion angle (β)were confirmed under fatigued condition. This result implies that injury risk becomes higher in fatigued condition. In other words, importance of cushioning and stability are getting higher with increase of running distance. Based on the obtained results, new prototyped shoes with adaptive devices were practically manufactured and the validities were checked.