転倒リスク評価のための歩幅GISの構築

抄録

Fall is the leading cause of injuries in walking. Previous researches found that features such as step length, cadence and minimum toe clearance are useful for evaluating fall risk. However, most of previous researches focused on inter-subject (healthy and patient, younger and elderly) differences measured under laboratory environments. Walk is achieved by interaction between human body and environment. In this paper, we developed step length GIS (Geographic Infomation System) by measuring walk in daily movement and evaluated effect of environment on fall risk. Step length was calculated from contact points and visualized as colored line representing the change of the step length. We found that the ratio of variability in step length was larger when the subject were climbing up the stairs than when they were walking on slope and flat plane.