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Average muscle fiber fraction by fiber type: A and D, type I. B and E, type IIa. C and F, Type IIb. Error bars shown as ±standard deviation. Statistical significance (P < 0.05) determined by 1-way analysis of variance with Tukey post hoc test: for A–C, compared to *UC and #SC; for D–F, compared to *SC, #UR, and †PR.
