Physical-Fitness Declines in Older Japanese Adults 論文 Shinichi Demura・Masaki Minami・Yoshinori Nagasawa・Nobuhiko Tada・Jinzaburo Matsuzawa・Susumu Satô ·2003-01-01 ·『Journal of Aging and Physical Activity』 11(1) pp. 112-122 doi:10.1123/japa.11.1.112