If you are assigned to the yoga group, you will take part in 4 weekly sessions of Tibetan yoga. If you are not able to attend 4 weekly sessions, you can attend 1 session every 3 weeks, for a total of 4 sessions over 12 weeks, of Tibetan yoga. You will be asked to complete a brief form at the start of each session that will take 1-2 minutes to complete. During the yoga sessions, you will be asked to do deep breathing exercises and perform different stretching and movement exercises. You will be able to move through the exercises at your own pace. Sessions occurring weekly will last 90 minutes. Sessions occurring once every 3 weeks will last 90 minutes. All sessions will be provided free of charge. One or more of these yoga sessions may be videotaped by the study staff for quality assurance purposes. Only the study staff will be able to view this videotape.