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. 2012 May 16;7(5):e37390. doi: 10.1371/journal.pone.0037390

Figure 6. Level of coactivation between the SO and TA muscles.

Figure 6

The coactivation was calculated as the relative contribution of the TA EMG to the total sum of the SO and TA EMG in each of the 16 bins representing the gait cycle. If the coactivation value approaches 50% the muscles contribute equally to the total amount of EMG activity indicating indicating maximal coactivation. 100% indicates that TA is active and SO silent while 0% indicates that the SO is active and the TA silent. Coactivation values of the high-heeled (open circles) and barefooted (filled circles) walking are means±SE.