Research Done on Yoga to Relieve Back Pain by The Archives of Internal Medicine

What yogis have been saying for thousands of years and what i have been propagating for the last 20 years, that yoga relieves back pain. Scientists have done thorough work on it.

http://well.blogs.nytimes.com/2011/10/24/yoga-and-stretching-equally-effective-for-back-pain/?ref=health