A. IL-6 expression determined by real time PCR at 1, 2 and 3 h post-stimuli (n=3). B. Effect of SN50 (NF-κB inhibitor, 50 µM) on depolarization-induced IL-6 expression (n=3–7). C. IL-6 secreted levels measured after ES in wt and mdx myotubes (n=6). D. IL-6 expression in diaphragms from either swim-exercised or control mice (n=6). *=P<0.05, **=P<0.01, ***=P<0.001 (indicated or versus basal wt value). ††=P<0.01 (versus basal mdx value) and ns, no significant difference.