We have tested the feasibility and effectiveness of a 2 year (average 16 7 months) walk/jog exercise program on 36 male orthotopic cardiac transplant patients (21 to 57 years old) seen initially 2 to 23 months after surgery. Comparison of initial exercise test results with those in 45 age-matched normal men showed the patients to have a lesser lean body mass (56 ± 7 vs 63 ± 8 kg, p < .001), wit...