Participants randomized to the exercise condition received a structured exercise program 3 times a week for 8 weeks. Exercise sessions consisted of a 5-min warm-up, 30 min of aerobic activity on a treadmill, followed by 15 min of weight training and a 5-min cool-down/stretching period. Each session was monitored by a staff exercise physiologist who guided one to two participants at a time. Using heart rate monitors, the exercise physiologist worked closely with each individual participant on exercise days to increase treadmill speed/slope to maintain a heart rate between 60% and 85% of maximum for 30 minutes. Once a participant was able to complete two sets of 15 repetitions of any given exercise, weight was incrementally increased.