In January the NY Times Magazine published an excellent article about yoga that addresses some concerns I have shared for some time. Many people have come to believe that they can self-treat physical ailments with yoga. While that may be true in some cases, for most deep seated problems the treatment needs to be more specific and the instruction nore presonalized than you would find in a yoga class. I whole-heartedly encourage everyone to engage in exercise such as yoga that promotes strength, flexibility, focus and relaxation. Just make sure you do it for the right reasons, and ask for help if something doesn't feel right!
http://www.nytimes.com/2012/01/08/magazine/how-yoga-can-wreck-your-body.html?pagewanted=all
