Fig. 2

Step Length Asymmetry Adaptation and Recalibration. a Stride-by-stride time course of step length asymmetry during Baseline, Adaptation, and Post-Adaptation for each session are shown. Note that each subject’s baseline bias has been removed, resulting in average step length asymmetry values of zero during Baseline. Each data point represents the average of 5 consecutive strides and shaded regions indicate the standard error for each session. For display purposes only, we include in the time courses stride values that were computed with a minimum of 10 subjects and the late adaptation behavior is aligned to the end of each subject’s adaptation epoch. The black arrow indicates a discontinuity in the data caused by many subjects taking a resting break at the same time. b-e The height of the bars indicates group average step length asymmetry ± standard errors. Individual subjects are represented with colored dots connected with lines. b Baseline: Baseline step length asymmetry is not influenced by slope. c Late Adaptation: Note that each session plateaued at different step length asymmetry values during the Adaptation epoch such that subjects reached more symmetric step lengths in the incline session than the flat session (d) ΔAdapt: Participants changed their gait by similar amounts during the Adaptation epoch in both sessions. e After-effects: Subjects had larger After-Effects during early Post-Adaptation in the incline session than the flat session, which is consistent with the Late Adaptation differences across sessions