Actually, there is some data suggesting that for elite endurance athletes (but not "regular" folks), it's possible that 2500 feet could cause oxygen levels in the blood to desaturate during intense exercise:
Actually, there is some data suggesting that for elite endurance athletes (but not "regular" folks), it's possible that 2500 feet could cause oxygen levels in the blood to desaturate during intense exercise:
We've seen dozens of performances now by the top athletes in top condition, and not a single improvement over seed times.