Water !

[Tim Wescott]

W a t e r:

1. 75% of Americans are chronically dehydrated. (Likely applies to half the world population.)

2. In 37% of Americans, the thirst mechanism is so weak that it is often mistaken for hunger.

3. Even MILD dehydration will slow down one's metabolism as much as 3%.

4. One glass of water will shut down midnight hunger pangs for almost 100% of the dieters studied in a U-Washington study.

5. Lack of water, the #1 trigger of daytime fatigue.

6. Preliminary research indicates that 8-10 glasses of water a day could significantly ease back and joint pain for up to 80% of sufferers.

7. A mere 2% drop in body water can trigger fuzzy short-term memory, trouble with basic math, and difficulty focusing on the computer screen or on a printed page.

8. Drinking 5 glasses of water daily decreases the risk of colon cancer by 45%, plus it can slash the risk of breast cancer by 79%, and one is 50% less likely to develop bladder cancer.

Are you drinking the amount of water you should every day?

[Tim Wescott]

Water: The Muscle Bath

How it makes muscle:

Whether it's in your shins or your shoulders, muscle is approximately 80 percent water. "Even a change of as little as 1 percent in body water can impair exercise performance and adversely affect recovery," says Volek. For example, a 1997 German study found that protein synthesis occurs at a higher rate in muscle cells that are well hydrated, compared with dehydrated cells. English translation: The more parched you are, the slower your body uses protein to build muscle. Not sure how dry you are? "Weigh yourself before and after each exercise session. Then drink 24 ounces of water for every pound lost," says Larry Kenney, Ph.D., a physiology researcher at Pennsylvania State University.

How it keeps you healthy: Researchers at Loma Linda University found that men who drank five or more 8-ounce glasses of water a day were 54 percent less likely to suffer a fatal heart attack than those who drank two or fewer.