
As much preaching as we all hear about not drinking enough water and how most people live life chronically dehydrated, it's interesting to know that
it's possible to drink too much water -- especially when exercising -- and more people do it than you might think. Endurance exercisers are the only ones really at risk, and the problem (called hyponatremia) happens when you drink in more water than your kidneys can excrete. Potentially fatal, it's not something to take lightly, but it is easy to avoid: just respect your own personal "thirst" meter and drink only when your body says you need to.