Muscle velocity recovery cycles (MVRCs) in TA and triceps muscles for WT and Draggen mice at three ages. (A) WT TA MVRCs in response to one conditioning stimulus. (B) WT TA MVRCs in response to five conditioning stimuli. (C) Draggen TA MVRCs in response to one conditioning stimulus. (D) Draggen TA MVRCs in response to five conditioning stimuli. (E) WT triceps MVRCs in response to one conditioning stimulus. (F) WT triceps MVRCs in response to five conditioning stimuli. (G) Draggen triceps MVRCs in response to one conditioning stimulus. (H) Draggen triceps MVRCs in response to five conditioning stimuli. WT TA young, n = 25; middle‐aged, n = 17, old, n = 17. Draggen TA young, n = 15; middle‐aged, n = 12 old, n = 12. WT triceps young, n = 23; middle‐aged, n = 6, old, n = 13. Draggen triceps young, n = 14; middle‐aged, n = 3, old, n = 10. Black = young, blue = middle‐aged, red = old. n = number of individual muscles per group.