Figure 5. Voluntary aerobic exercise augments arterial markers of antioxidant defense and stress resistance. Aortic protein expression of catalase (A) and Hsp90 (B) in arteries from young control (YC), old control (OC), young voluntary wheel running (YVR) and old voluntary wheel running (OVR) mice. Representative images are presented below each panel with corresponding images of normalizer (beta actin) taken from the same region of the same blot. Data are presented normalized to beta actin and relative to the mean of the YC group as means with error bars representing SEM, n=6-8/group. * p<0.05 vs. YC and OC (main effect of exercise).