how much water should you drink when exercising in the heat?
If you are exercising in hot weather, you should add even more. Space out your hydration. If you're exercising, drink 15-20 ounces of water one to two hours before you start your workout, another 8-10 ounces 15 minutes before you begin, and 8 ounces every 15 minutes for the entire duration of your exercise.