Fig. 4.
First step characteristics: Step length, COM-to-ankle distance (COM-Ankle), COM velocity (COMv), and Stability margin at first step contact in the ML direction, normalized by leg length at (a) perturbation level 3, (b) level 4, and (c) level 5. Values and error bars are mean and SEM. (a) *p = 0.017, **p < 0.001, ***p = 0.002; (b) *p = 0.001, **p = 0.018, ***p < 0.001; (c) *p = 0.041, **p = 0.024.