Shosuke Satake1,2, Kaori Kinoshita1, Yasumoto Matsui3, Hidenori Arai4. 1. Section of Frailty Prevention, Department of Frailty Research, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology, Obu, Japan. 2. Department of Geriatric Medicine, National Center for Geriatrics and Gerontology, Obu, Japan. 3. Department of Orthopedics, National Center for Geriatrics and Gerontology, Obu, Japan. 4. National Center for Geriatrics and Gerontology, Obu, Japan.