A whopping 75% of Americans are chronically dehydrated; are you one of them?

Water does everything from lubricating your joints to improving brain function. It's also a legitimate way to fight off hunger. The Journal of Athletic Training claims athletes should drink 17-20 ounces of water 2-3 hours before a workout, and another 7-10 ounces 10 to 20 minutes before exercise, as well as replacing any fluids lost during your workout within a 2 hour period after you're done.

The moral of the story? Drink more water!