 - Uncontrolled co-morbid illness including, but not limited to, type I diabetes mellitus, type II diabetes mellitus, hypertension, symptomatic congestive heart failure, unstable angina pectoris, claudication, cardiac arrhythmia; active pulmonary disease; hypercholesterolemia, neurological condition, ischemic heart disease, cardiac disease, kidney disease, respiration problems, asthma, shortness of breath, physical limitations, abnormal thyroid function, active malignancy, except for squamous or basal cell carcinoma of the skin; receiving active chemotherapy or radiotherapy; or psychiatric illnesssocial situations that would limit compliance with study requirements 