They acclimate for a fairly long period of time and still most people who try fail. It’s quite likely that those who succeed were genetically predisposed to do

They acclimate for a fairly long period of time and still most people who try fail. It’s quite likely that those who succeed were genetically predisposed to do so rather than just making it on sheer will. There is a good reason why athletes do high altitude training camps it can boost your oxygen carrying capacity, improve fat oxidation and improve your anaerobic capability.