What are the Best Breathing Exercises ?- The Wim Hof Method

This is the Wim Hof Breathing Method.  It is very powerful, one of the best things I have ever done.  Anyone can do it.  Lay flat or with a very flat pillow, not like he uses, that is too high.  You can sit as well.  Don’t do it while driving or in the water.  I do it every morning when I wake up.  For more about this method, search Youtube or go to http://www.wimhofmethod.com