Gait variabilities in 15 different walking conditions.
(A) Stride time variability in 15 different walking conditions. (B) Stride length variability in 15 different walking conditions. (C) Step width variability in 15 different walking conditions. From left to right, the walking conditions are uphill 15%_sub-threshold, uphill 15%_no, uphill 15%_supra-threshold, uphill 8%_sub-threshold, uphill 8%_no, uphill 8%_supra-threshold, level_sub-threshold, level_no, level_supra-threshold, downhill 8%_sub-threshold, downhill 8%_no, downhill 8%_supra-threshold, downhill 8%_sub-threshold, downhill 8%_no, downhill 8%_supra-threshold, respectively. Error bars indicate between-participant standard deviations. X indicates the mean of stride time. Black dots indicate the outlier. The symbols *, #, and & indicate the significant difference among inclines, and $ indicates the significant difference among vibration conditions.A significant effect of inclines was observed in stride time (FThe effect size was large because the Partial Eta Squared values for the interaction between the effect of vibrations and the effect of inclines were 0.4 for the stride time and 0.127 for the step width based on the literature (