Fig. 7. (A) Mean myoelectric intensity (black, solid line) for soleus (N=340), plantaris (N=364) and medial gastrocnemius (N=477) muscles, showing interplay between C_s(t) (red dotted line) and C_f(t) (blue broken line). All values are means ± s.e.m. (B) Vector plot of PCI and PCII loading scores in the soleus (red, N=340), plantaris (green, N=364) and medial gastrocnemius (blue, N=477); each arrow represents a different time point during the stride. The vertical line in each diagram denotes the transition from stance to swing phase.