Research on Gait Assessment Using Center-of-Gravity Velocity Estimation by Muscle Force

Abstract

In this study, we construct a model describing the relationship between gait velocity and muscle forces of lower limbs, which would discriminate between normal and abnormal gait. Walking is a movement that is based on inter-articular coordination of the lower limbs. In maintaining and improving walking ability, it is important not only to maintain individual muscle mass, but also to use muscles that enable proper inter-articular coordination. In people with leg disabilities and the elderly, gait is different from normal gait by a healthy person. In the measurement experiment, normal, scissors and circumduction gaits performed by two healthy adult males have been measured using an optical motion analyzer. The two individuals walk three times each, for a total of nine times. The gait model is constructed using some muscles of the left and right lower limbs. The application of the gait model to discriminate between normal and abnormal gait is examined based on the accuracy of the estimation of center-of-gravity velocity during walking. Gait models that have been constructed for each gait show potential for identifying abnormal walking.