It may be hard to believe, but while you are sitting in the stands all bundled up in a parka at a football game or standing at the bottom of the mountain watching your kid compete in a half-pipe competition, he may be becoming dehydrated. Indeed, a recent study showed that cold weather actually alters the thirst sensation. When athletes don't feel as thirsty, they don't drink as much fluids, and this can cause dehydration. Thus, while a young athlete's need to stay hydrated is a constant regardless of the sports season, athletes exercising in cool or cold weather need to be taught to drink more fluids throughout the day.