 - Active treatment for cancer, stroke 6 mo, peripheral vascular disease, coronary artery disease myocardial infarction 6 mo, state III, IV Congestive Heart Failure, valvular heart disease, major psychiatric disease, severe anemia, liver or renal disease, diabetes, severe osteoarthritis, blindness or deafness, fracture in upper or lower extremity within the last 6 months, upper or lower extremity amputation, anticoagulant therapy aspirin use is permitted, parkinsons disease 