Originally Posted by imageWIS
I'll stick to water. Lots and lots of water.
Not to be a pest or anything, but actually, drinking water is bad for you if your workouts are over 1 hour, and drinking "lots and lots" of water is bad for you period. Your body needs electrolytes and one of the main electrolytes is sodium chloride, which is a salt. Your body loses these through sweat and you need to replenish them. By drinking too much water after sweating you're actually inhibiting electrolyte replenishment by replacing the fluids in your body with water, therefore diluting the salts you already have. This lowered concentration of salts in your body's fluid can lead to dilutional hyponatremia, which results in loss of performance and other severe adverse effects.
This is why, when a baby (or adult) gets diarrhea doctors recommend giving them pedialyte - not water.
If your workouts are under one hour then I would stick with water (I drink water during workouts because my workouts are typically about 30 minutes), but if you're working out for over one hour, especially at a high intensity, then you should at least drink something which replenishes electrolytes along with your water. If you are running a five hour marathon you should drink gatorade the whole time and not drink any water.