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In contrast, Segal et al. (2005) found that the medial and lateral gastrocnemius and soleus displayed superior muscle activity in the proximal regions compared to the distal regions of the muscle. (strengthandconditioningresearch.com)
Interestingly, the single - fiber area histogram of soleus muscles from IL - 15Rα — KO mice was not different from control, demonstrating a specific effect of IL - 15Rα knockout on fast muscle morphology. (jci.org)
In agreement, Reid et al. (2011) compared eccentric plantar flexion with the knee fully extended and during a flexed position and reported superior gastrocnemius muscle activity during plantar flexion with full knee extension and no difference in soleus muscle activity. (strengthandconditioningresearch.com)