This study examined the relationship between walking fluctuation and physical fitness in 21 middle-aged and elderly healthy women (65.95 ± 6.6 years). Walking data was gained during a typical six-minute walk by using sensors in the participantsʼ shoes. Stride time (ST), the coefficient of variation of stride time (STCV), and the fractal-scaling index (α) were calculated. Also measured were the ten-meter usual walking time, functional reach, one-leg standing time with eyes open, vertical jump height, and grip strength, and a fitness age score (FAS) was then calculated by using these results. In addition, twenty-second stepping frequency, thirty-second chair standing frequency, and isometric knee extension strength were measured. There was a significant negative correlation between age and FAS (r=-0.590, p=0.005). When participants were divided into two groups by a median of ST, STCV and α, significantly superior physical fitness were observed in higher ST and higher STCV groups, whereas significantly longer step length were observed in higher α groups.This study therefore suggests that STCV is more affected by musculoskeletal function than α. ; 論文