Abstract
This paper designs and evaluates a pair of walking assistive devices based on the arc foot of a passive walking robot. We aim to enable elderly persons to walk with less muscular strength. This device is a kind of shoe that has an arc-shaped sole designed in order not to occur speed loss when walking. The arc-shaped sole substitutes for the ankle joint of a human. We evaluated the effectiveness of the assistive devices using an electromyograph and a motion capture. The result shows that less use of a front thigh muscular is necessary.