Experimental Design: This study (Healthy Heart Amputation Rehabilitation Therapy (Healthy HART) - Part 1) involves an intent-to-treat designed randomized 2-group pre- and post-intervention study to examine if conventional rehabilitation augmented by Healthy H.A.R.T. exercise: a) increases aerobic capacity, b) promotes rehabilitation achievements, and c) improves quality of life. Last, cost estimates of the two therapies will be compared.