Wim Hoff and Patrick Mckeown sports performance simulate high altitude training, breathwork The Wim Hof method is popular for its connection to engaging the body at a parasympathetic level with the breathing techniques. Patrick Mckeown speaks to simulating the High altitude training decreased oxygen adaption. I have been using both and adapting the best principles for sports performance as a barefoot runner. Using exercises based on the iceman pushups and the breathing exercises from the oxygen advantage program. I am using an ascending set based on starting with an easy set after full the wim hof method breathing technique,then running 15 steps on no breath, stop take 5 breaths based on the nasal breathing technique, from the patrick mckeown the oxygen advantage. Repeating the 5 breath work, hold the 6th breath then run 2 other reps increasing each rep to 25 then 35 steps. I then repeat this 3 times with same breathing exercise but increasing steps. I put this in as part of a longer run and jog out until I am recovered.