Representative recordings showing the discharge of mechanically sensitive (group III) afferents in response to static contraction induced by electrical stimulation of L5 ventral root in sham+sedentary (sham+Sed) (CV, 4.1 m/s, A), sham+exercised trained (Sham+ExT) (CV, 3.0 m/s, B), chromic heart failure+sedentary (CHF+Sed) (CV, 4.7 m/s, C), and CHF+ExT rats (CV, 5.3 m/s, D).