Superoxide dismustase (SOD)2 protein (a), catalase protein (b) and glutathione peroxidase (GPX)1 protein (c) in quadriceps muscle from 3 month old (mo) untrained chow mice (UT-C), 15 month old untrained chow mice (UT-C), 15 month old untrained resveratrol (RSV) supplemented mice (UT-R), 15 month old exercise trained (T-C) and 15 month old exercise trained and RSV supplemented (T-R) whole body PGC-1α knockout (KO) and littermate wild type (WT) mice. Values are presented as means ± S.E.; n=8–10. †: Significantly different from 3 month old UT-C within genotype, p<0.05. *: Significantly different from 15 month old UT-C within genotype, p<0.05. (*): Tends to be significantly different from 15 month old UT-C within genotype, 0.05≤p<0.1. #: Significantly different from WT within group, p<0.05. Representative blots are shown on each figure with samples loaded in the same order as depicted on the graph.