by Chalene Johnson
When you’re exercising, you must increase your hydration level! Even very slight dehydration can slow your metabolism by 3 percent, or about 45 fewer calories a day, which in a year could mean weighing 5 pounds more than you need to. The key to hydration isn’t how much you drink; it’s how frequently you drink it. Don’t wait for thirst to strike. Drink at least 16 ounces of water before you exercise. Drink 8 ounces an hour before and another 4 to 8 ounces every 15 to 20 minutes during your workout. Finish with at least 16 ounces over the course of two hours after you’re done exercising.