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. Author manuscript; available in PMC: 2020 Jun 1.
Published in final edited form as: J Appl Biomech. 2019 Apr 10;35(3):182–189. doi: 10.1123/jab.2018-0297

Figure 4.

Figure 4.

(A) Group mean data for electromyographic activity of the soleus muscle during passive ankle rotation (black) and during the 25% IVC (green) and 75% IVC (blue) prescribed activations across the range of motion tested (dorsiflexion positive). Horizontal dashed lines represent target EMG activations based on maximum activation extracted from the 0° isometric voluntary contraction (IVC). (B) Group mean data for soleus fascicle lengthening velocity during passive ankle rotation (black) and during the 25% IVC (red) and 75% IVC (blue) prescribed activations across the range of motion tested. Here, shaded regions represent standard error of the mean. A post-hoc repeated measures ANOVA (condition × 20% ankle rotation bins) revealed that the 75% IVC condition exihibited slower fascicle lengthening compared to the other conditions (p-values<0.050), but only during the first 40% of ankle rotation (i.e., 14°). (C). Group mean soleus fascicle length behavior during passive ankle rotation (black) and during the 25% IVC (red) and 75% IVC (blue) prescribed activations across the range of motion tested.