1. Doctoral Program in Physical Education, Health and Sport Sciences, University of Tsukuba: 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
2. Japan Society for the Promotion of Science, Japan
3. Department of Occupational Therapy, Ibaraki Prefectural University of Health Science, Japan
4. Physical Fitness Research Institute, Meiji Yasuda Life Foundation of Health and Welfare, Japan
5. Faculty of Health and Sport Sciences, University of Tsukuba, Japan