Histological changes in the soleus muscle after 1 w.

<p>Muscle samples from the exercised side (left column, A, C, E) and contrateral non-exercised side (right column, B, D, F) of the soleus muscle after 1 w of EMS/E. The sections are stained with H&E. The left column (exercised side) shows fiber hypertrophy and fiber splitting (arrow) (A), small angular fibers (arrowheads) (C) and existence of internal nuclei (arrow) (C) and inflammatory cell infiltration in the area of a necrotic fiber (asterisks) (E). The right column (non-exercised side) shows occurrence of fiber splitting (arrow) (B), internal nuclei (arrow), fiber hypertrophy (D) and an accumulation of inflammatory cells in the extracellular matrix (arrow) (F). (Bar = 50 µm).