I understand what Shadon is asking, as my understanding of dehydration and hydtration has to do with keeping the body continually hydrated, not just trying to drink enough water an hour or two before you go out. If you body is dehydrated, that's too soon to compensate.

That being said, I try to drink a lot of water all the time, and the goal is to NOT have to get up in the middle of the night to pee.

Irulan