National Geographic

Drink Plenty of Water When Working Out Before You Get Dehydrated

When you sweat during any physical activity your body is losing water. This will even happen in the water and cold weather, so staying hydrated is important. If you are exercising less than 45 minutes, water is your best {option|choice}. It's easily absorbed, readily available and less expensive than sport drinks, and it's the best choice to drink before a {moderate|reasonable} length workout.