Abstract
In recent years, various kind of diseases leads to increase of elderly people's amputation. Appropriate prosthetic prescription and walking rehabilitation are required to improve their ADL. It is important to understand skill of walking with the prosthesis for this purpose. The present study focuses on walking on stairs with the prosthetic leg as an example of higher ADL. We suppose that it is important to improve easiness of walking on stairs. This study, therefore, aims to development of the prosthesis leg with smooth gait in stairs. As the first step, effect of the inertia property on easiness of stair ascent was investigated by conducting experiments with an expert user of the prosthesis. In addition, gaits with the various inertia properties were investigated. As a result, it was found that easiness of walking was changed widely by inertia property of the prosthesis.
