1. Department of Modern Mechanical Engineering, Waseda University, Tokyo, Japan
2. Department of Mechanical Engineering Informatics, Meiji University, Tokyo, Japan
3. Humanoid Robotics Institute, Waseda University, Tokyo, Japan
4. Graduate School of Creative Science and Engineering, Waseda University, Tokyo, Japan
5. Institute of Sport Science, ASICS Corporation, Hyogo, Japan
6. Faculty of Sport Sciences, Waseda University, Tokyo, Japan
7. Faculty of Engineering, Kanagawa University, Yokohama, Kanagawa, Japan