AFAIK they do train at high elevation when possible; it's just that some also cheat too. The U.S. Olympic training center is located at over 6,000ft of elevatio

AFAIK they do train at high elevation when possible; it's just that some also cheat too. The U.S. Olympic training center is located at over 6,000ft of elevation, in Colorado Springs, presumably for exactly this reason. Some sports probably aren't very amenable to this sort of consistently-high-elevation training though — if you play for a specific city's sports team, for example, you're probably going to do most of your training and playtime near that city.