For obese persons, the focus of the exercise program should be based on low-intensity aerobic activity with progressively increasing duration. Aerobic exercise provides overall health benefits, including fat loss, an increase in daily energy levels, and reduced risk of health problems. At the beginning of the program, the frequency and duration of the activity is more important than the intensity. Aim for exercising four or five days a week for 30 to 60 minutes. If you were previously sedentary, these sessions can be broken up into three 10-minute sessions, with gradual increases in duration.