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Fig. 3. General electromyographic (EMG) variables during walking and running at different normalised speeds. (A) Normalised EMG activity in the swing- and support-related muscles, averaged over swing and stance, respectively, and then summed across all muscles. (B) Peaks of linear EMG envelopes summed across all muscles. A speed of 100% corresponds to the gait transition speed (2.1±0.2ms-1). An asterisk indicates a significant (P<0.05) difference in EMG activity between walking and running at the same speed.