Water Fact: Whether you're at the pool, on the court or on the treadmill, keep that glass of water close at hand. "Because we don't notice our sweat in the water, we often don't think we need to re-hydrate," says Richter. "But we still do."
You can use your keyboard to see the next slide ( ← previous, → next)
Find out if you know the truth about these 17 water myths
We reveal the truth about 17 common water myths.
Myth Busters: Do You Have Your Facts About Water Straight?