Looking for new biomarkers, which would improve early detection of damage in skeletal muscle, Dahlqvist et al. [127] investigated patients affected by Becker muscular dystrophy (BeMD), an X-linked inherited myopathy with a mutation in the dystrophin gene resulting in dysfunctional dystrophin, McArdle disease, and a control group of healthy individuals. The gene discussed is DMD; the disease is Becker muscular dystrophy.