Wim Hof is a wizard from the Netherlands who uses very simple breathing exercises to conquer hypothermia, beat world records, and become superhuman - and it's all scientifically validated. He can swim underneath ice sheets, hold his breath underwater for record time, and climb Mount Everest in only his shorts - a very important task indeed. He proves that not only is he capable, but he can teach anyone to use his method and conquer similar goals. His method teaches that you have the power to connect with your endocrine system through these breathing techniques and ignite an inner fire with the oxygen you breathe and boost your immune system. He believes he can change the world as this can also improve the effects of depression, anxiety, and who knows what else!
Check out this short documentary and try his exercises yourself!