Graphs showing frequency of fiber types in the exercised and non-exercised muscles after 1w, 3w and 6w of unilateral exercise.

<p>Figs. A–C show the magnitude of changes in fiber type frequency (%) in the soleus muscles and Figs. D–H shows corresponding changes in the gastrocnemius muscles. The mean group values in the figure are connected with lines to facilitate interpretation of the direction of changes after E/EMS, but the lines do not imply that the changes between the sample points represent a linear change over this period. Exercised leg is defined by continuous black line, non-exercised leg by dotted line. Significant difference (p<0.05) within the exercised leg is marked with <i>E</i> and significant difference within the non-exercised leg is marked with <i>N</i>. Significant differences relative to controls are marked (c), to 1w group (1w) and to 3w group (3w). Significant differences (p<0.05) between exercised and non-exercised legs are marked with an asterisk (*). Note the shift against a lower proportion of fibers containing slow MyHCI and a higher proportion of fibers containing fast MyHCII in both exercised and non-exercised muscles. Note also the lack of hybrid MyHCI+IIa fibers in the exercised soleus muscle after exercise. Bars indicate SD.