Abstract
Excessive pronation should be controlled in not only running but also walking in order to enhance footwear stability. In the designing of footwear stability, it is important to clarify excessive pronation mechanism consists of foot and ankle movements. The purpose of this study is to clarify requirement properties for footwear stability in walking. To consider the excessive pronation in walking, ankle motion analyses on 5 surface conditions (flat, 2-side hill, down hill, up hill) were carried out. It was confirmed that maximum rear-foot eversion (β_<max>) and maximum tibia internal rotation (γ_<max>) in HC to FF phases were important parameters for stability function in walking. The relationship between γ_<max> and sole rear-foot torsional angle was discussed and γ_<max> obtained from shoes with various sole rear-foot stiffness were evaluated. In the result, it was clarified that small rear-foot internal torsional angle makes a good influence on footwear stability in walking.
