Gene expression of denervation associated markers in adult and aged LRT and HRT rats (n = 4–7) in the tibialis anterior (TA) muscles. (A) TA LRT Myogenin gene expression, (B) TA HRT Myogenin gene expression, (C) TA LRT AChRα gene expression, (D) TA HRT AChRα gene expression, (E) TA LRT MuSK gene expression, (F) TA HRT MuSK gene expression, (G) TA LRT Rapsyn gene expression, and (H) TA HRT Rapsyn gene expression. Age-related upregulation of genes associated with denervation were observed in aged sedentary (SED) and exercise (EXER) rats, *. p ≤ 0.05.