MnSOD (A), TrxR1 (B), and myeloperoxidase (C) levels evaluated at rest, before (PRE) and after (POST) training period, in elderly belonging to control group (CTRL) and in those trained for 12 weeks (TR). Protein expression was measured as the ratio between the optical density (OD) of the marker protein and the OD of β-actin. In each panel, images show the results of immunoblotting from the same representative subject, while the histograms represent the mean ± SEM. **p<0.01 and *p<0.05.