Yoga beneficial, but you have to be careful, says author

Apologist for yoga here:
http://ottawa.ctv.ca/servlet/an/local/CTVNews/20120209/science-of-yoga-120211/20120211/?hub=OttawaHome

Emma O'Neill, an authorized Ashtanga Yoga teacher based in Toronto, says any activity done incorrectly or without adequate instruction "can be risky."

But she calls statements that link yoga to stroke "ridiculous," and said it's a teacher's responsibility to guide students through their practice.

This is just like chiropractic, any risk is too much.