Fig. 4.
Percent difference of single-muscle fiber function of lifelong exercisers (LLE) and old healthy nonexercisers (OH) compared with young exercisers (YE). MHC, myosin heavy chain. *P < 0.05 vs. other groups; ‡P < 0.05 vs. YE; †P = 0.056 vs. YE.
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