Human athletes have long utilized training at high altitudes to improve their oxygen-carrying capacity, so it should come as no surprise that trainers of equine athletes have tried similar methods.

Most men hit the gym to build muscle, drop a few pounds, or sculpt a six-pack. Nothing wrong with that—until you’re on a mountain. Mother Nature doesn’t care about your physique. The only thing you ...

It seems like a simple-enough concept: Train where there’s less oxygen, force your body to adapt, and come back down to low altitude to race fitter and faster. Indeed, the allure of altitude training ...