Gene expression of denervation associated markers in aged LRT and HRT rats (n = 3–6) in the gastrocnemius (GTN) muscles. (A) GTN LRT Myogenin gene expression, (B) GTN HRT Myogenin gene expression, (C) GTN LRT AChRα gene expression, (D) GTN HRT AChRα gene expression, (E) GTN LRT MuSK gene expression, (F) GTN HRT MuSK gene expression, (G) GTN LRT Rapsyn gene expression, and (H) GTN HRT Rapsyn gene expression. Exercise-induced upregulation of Myogenin was observed in aged HRT rats, *. p ≤ 0.05.