Fig. 2

The effects of exercise on the apoptosis and mitochondrial function of skeletal muscle. a The number of TUNEL-positive cells (indicated by the black arrowheads) was counted in four groups (n = 3 samples/group). Magnification × 200. b The results were expressed as means with standard derivation. The comparison of mitochondrial membrane potential (∆Ψm) (c) and ATP concentrations (d) among groups was conducted by the Mann-Whitney U test (n = 15 samples/group). *p < 0.05, **p < 0.01