I think how much water you need depends on your body weight. I drink periodically throughout my my workout, but I don't chug-a-lug a bottle of water. I drink some before I start, then take a few sips at a time during the workout. When I'm done, I'll drink a lot of water, partly to cool me down, and partly to rehydrate me.
I live in southern Arizona, and sweat dries on the skin almost immediately because of the heat and low humidity, so it's critical to stay hydrated in those conditions. So, if I'm walking or jogging outside, I drink more water than if I were working out inside an air-conditioned gym or in my own house.
- 6/5/2011 12:39:00 PM