http://www.albertmohler.com/. I believe Dr. Mohler asks the right questions and seeks to think biblically in regards to the truth about the deep roots of yoga. Quite frankly, I had not thought much about yoga before. I have not practiced it but anytime I hear someone talk about it they always tell me it is a great exercise.
Go to the article and read it. Tell me what you think about what Dr. Mohler has to say.