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http://www.sciencedaily.com/releases/2011/10/111024164708.htm
ScienceDaily (Oct. 24, 2011) — Yoga classes were linked to better back-related function and diminished symptoms from chronic low back pain in the largest U.S. randomized controlled trial of yoga to date, published by the Archives of Internal Medicine as an "Online First" article on October 24. But so were intensive stretching classes.
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"We found yoga classes more effective than a self-care book -- but no more effective than stretching classes," said study leader Karen J. Sherman, PhD, MPH, a senior investigator at Group Health Research Institute. Back-related function was better and symptoms were diminished with yoga at 12 weeks; and clinically important benefits, including less use of pain medications, lasted at least six months for both yoga and stretching, with thorough follow-up of more than nine in 10 participants.
In the trial, 228 adults in six cities in western Washington state were randomly assigned to 12 weekly 75-minute classes of either yoga or stretching exercises or a comprehensive self-care book called The Back Pain Helpbook. Nine in 10 of them were primary-care patients at Group Health Cooperative. Participants in the trial typically had moderate -- not severe -- back pain and relatively good mental health, and most had been at least somewhat active before the trial started.
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