In another study, after a 5‐week moderate‐intensity treadmill exercise intervention in rat models of DCM, we found that the expression levels of markers of myocardial mitochondrial biogenesis, mitochondrial fusion protein 2 (Mfn2) and Drp1 were increased, which increased the number of mitochondria and improved their function (Veeranki et al., 2016). Here, MFN2 is linked to familial dilated cardiomyopathy.