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EMG start and stop times relative to foot-down in the proximal (green bars), central (red bars) and distal (blue bars) portions of the posterior ILPO at speeds between 0.5 and 3.0 m s–1. Zero time indicates foot-down. Solid horizontal bars extend from the mean EMG start to the mean EMG end. Vertical bars with error bars indicate mean stance duration ± 1 s.e.m. Error bars indicate –1 s.e.m. for the start time and +1 s.e.m. for the end time.
