 1. Walk briskly for at least 50-60 minutes at a time, at least 3 times per week, ideally 5 days a week. Exercising is to increase gradually, starting with 10 minute periods, repeated on the same day and that will be gradually increased as tolerated by the patient. Heart rate will be used to monitor exercise intensity, it is recommended that aerobic exercise be performed at 70-80 of maximum heart rate. Lung 2014 192:175-184. 