Associations between Serum 25-Hydroxyvitamin D Concentration and Physical Performance in Old-Old People Living in a Northern Area of Japan

Atsushi Mizumoto^1*, Hikaru Ihira¹, Keisuke Yasuda², Keitaro Makino¹, Yoko Miyabe¹, Shigeyuki Saitoh³, Hirofumi Ohnishi⁴, Takao Suzuki⁵ and Taketo Furuna¹

¹Graduate School of Health Sciences, Sapporo Medical University, Japan

²Department of Rehabilitation, Obihiro-Kosei General Hospital, Japan

³Department of Nursing and 2nd Department of Internal Medicine, Sapporo Medical University, Japan

⁴Department of Public Health and 2nd Department of Internal Medicine, Sapporo Medical University, Japan

⁵National Institute of Longevity Science, National Center for Geriatrics and Gerontology, Japan