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 ...

There’s a reason elite runners flock to towns such as Park City, Utah (altitude 6,936 feet above sea level), Flagstaff, Arizona (6,821 feet above sea level), and Mammoth Lakes (7,881 feet above sea ...

At the 1996 Olympic Games in Atlanta, American distance runners earned a total of zero medals in front of their home fans. Two decades later, in Rio, they picked up seven medals in events between 800 ...