Pyeongchang's moderate altitude is taken into consideration

"High-altitude training calls for more calories and more hydration," Chef Chacosky told ABC News. With an average altitude of 2,300 feet above sea level, Pyeongchang is lower than most of the western United States and higher than most of the eastern United States.

That doesn't make its altitude exceptionally high. In fact, the city's slogan is "Happy 700," and it claims to be at "the best altitude for human biorhythm." But both necessary caloric intake and human hydration needs increase with altitude. Depending on where each athlete is used to performing, nutritional and hydration needs in Pyeongchang might be different than they are at home.

[Photo via @jessiediggins]

3 of 6