<qa>  What was the BMI?Individuals were excluded from the study if their body mass index BMI was greater than 35 or if they had hypertension, heart disease of any kind or an abnormal electrocardiogram, stroke, chronic infectious disease, any musculoskeletal problem which would limit treadmill testing or impair their ability to exercise, asthma, emphysema, chronic bronchitis, or any other serious medical condition that might make exercise unsafe or unwise. Other exclusion criteria were a schedule that would make adherence unlikely such as very frequent travel, plans to move from the area within the next year, pregnancy or plans to attempt pregnancy, self-report of more than three alcoholic drinks per day on 5 or more days per week, hospitalization for a psychiatric disorder within the last 6 months, currently suicidal, bipolar, or psychotic, or currently using prescription medication that might impair exercise performance or tolerance, specifically beta blockers. Participants agreed to be randomly assigned to any of the conditions and read and signed an institutionally approved consent form after all their questions were answered. 