Fig. 4

Ratios of Type I, IIa, and IIb fibers in the Pcm and representative SDH staining of the CSA of the Pcm from the sham, 1 W, 2 W, and 4 W groups. The ratio of Type I was significantly lower in the 1 W, 2 W, and 4 W groups versus the sham group. The ratio of Type I was significantly lower in the 2 W group versus the 1 and 4 W groups. The ratio of Type IIa did not differ significantly between the four groups. The ratio of Type IIb was significantly higher in the 1 and 2 W groups versus the sham group (p < 0.01). SDH-stained cross section of the rat Pcm: the sham group (A), 1 W group (B), 2 W group (C), and 4 W group (D). CSA, cross-sectional area; SDH, succinate dehydrogenase; Pcm, pubococcygeus muscle; sham group, sham-operated group; 1 W group, 1 week after vaginal distention; 2 W group, 2 weeks after vaginal distention; 4 W group, 4 weeks after vaginal distention. Values are mean ± standard deviation. Statistical analysis ANOVA, Steel–Dwass multiple comparison test, Tukey’s test. *Indicates a statistically significant difference (p < 0.05 versus the sham group); †Indicates a statistically significant difference (p < 0.05 versus the 2 W group). Scale bar = 100 μm