Fig. 3. Average GM fascicle length, pennation angle, MTU length change (MTU length) and enveloped GM and tibialis anterior (TA) EMG signals with respect to time during walking (A) and running (B) for downhill (-10%; blue), level (0%; green) and uphill (10%; red) conditions. The shaded areas mark the mean stance time across each condition and the pooled 95% confidence interval (± 2 s.e.m.) across all grades for both walking and running is shown with respect to the level condition as the area within the dotted lines. The mean standard error across each grade condition was equivalent.