Fig. 8. PCI and PCII loading scores at partitioned time points during a stride for the soleus (S, N=6880), plantaris (N=7280) and medial gastrocnemius (MG, N=9540) muscles. Values are means ± s.e.m. Asterisks indicate foot on, 0% stride duration; hash marks indicate foot off. Note that in each muscle, activity begins during the swing phase, therefore the direction of each loop is indicated by the arrows; 1 indicates the beginning of myoelectric activity.