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Muscle activity, for a healthy subject (mean for 6 trials) is expressed in percent Stance Phase for un-normalized EMG; (A), EMG normalized by MDM; (B), EMG normalized by PDM; (C), EMG normalized by MVC; (D), EMG normalized by *PDM;(E), and EMG normalized by **PDM; (F). Quads = quadriceps muscles, Hams = hamstring muscles, Gastroc = gastrocnemii muscles.
