Or maybe not. The whole claim that yoga breathing can help cure all things is about as solid as the claim that rhodiola rosea is a miracle plant. Or chamomile. Lots of people will swear by it, but the scientific evidence is zero.
And tic tac toe is way easier to learn for beginners. I have done yoga in a serious manner for almost 20 years but I have never seen a clear path for learning pranayama. This may be a problem with the way yoga is taught in the West but I think Win Hof deserves credit for developing and publicizing an easy to learn and effective approach to breathing techniques.
Go to the source: http://www.yogebooks.com/english/atkinson/1903sciencebreath....