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On call: Hydration for summer exercise

Updated: July 01, 2008

On call

Hydration for summer exercise

Q. I've always been told that it's important to drink plenty of fluids during exercise, and it seems to work for me. But now I've read that too much water can be very dangerous. Which is right?

A. Both are right: good hydration is important, but overhydration can be hazardous, even lethal. Fortunately, common sense and moderation will protect you from both extremes.

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