Plantaris muscles obtained from control (Sham) and 10 d synergist ablated (SA) mice were frozen adjacent to one another, cross-sectioned, and then subjected to immunohistochemistry for different fiber types as described in Figure 2, and Ser240/244 phosphorylated S6 (P-S6 Ser240/244) or total S6. (A) Representative images of P-S6 Ser240/244 and (B) total S6. (C) The effect of SA on the relative amount of P-S6 Ser240/244 and (D) total S6, within each fiber type. The bars in A and B indicate a length of 200 μm. All values are presented as the mean + SEM (n = 84–500 fibers / group from 6 independent pairs of muscles). • Significant effect of SA within a given fiber type, ∗ significantly different from type 1, 2A and 2X fibers, # significantly different from type 2A and 2X fibers, (P<0.05).