I've been using Wim Hof's breathing technique and cold therapy for about four months now daily, and can say without a doubt that it has bettered me physically, spiritually and emotionally. My asthma has decreased dramatically, (also with the help of the Buteyko breathing technique). Energy levels are higher, have't been sick since starting it and if ever i feel emotionally down, after a round of breaths im back to calm equanimity. I Highly recommend everyone give it a go daily for a week and see the results.