Exercise, Heart Failure, and Type 2 Diabetes

Inclusion Criteria: * ≥50 yr of age * New York Heart Association class II-III CHF and ejection fraction ≤35% * receiving optimal medical therapy * sedentary (≤ 30 min/wk structured physical activity). * Half of volunteers (n=30) will have a diagnosis of type 2 diabetes (CHF+T2D). Exclusion Criteria: * smoking * changes in medication ≤6 wk prior to enrollment * major cardiovascular event or procedure ≤6 wk prior to enrollment * foot ulcers * advanced neuropathy * co-morbidities or other limitations that may interfere with or prevent volunteers from safely completing the exercise training * fixed rate pacemaker * type 1 diabetes mellitus