Your body is 60 percent water, and you can’t live without it for very long. You excrete at least a quart of water every day, so you must drink at least that much to avoid becoming dehydrated. Nearly all foods contain water, and some are 90 percent fluid. It’s important to keep your body well hydrated, especially if you work out, are in the hot sun, or are very physically active. As a guideline, an athlete should consume between five to twelve ounces of water every 15 minutes. A good rule is to drink more than what you think you’ll need. When you exercise, you lose a lot of fluids and some minerals. Replenishing them with water is superior to sports drinks, because many commercial drinks of that nature contain refined sugars, food colorings, additives, and other chemicals, which aren’t good for you. When you sweat a lot, you lose salt and potassium, which are important electrolytes . Some people take salt tablets prior to exercising to avoid losing minerals, but you can replace minerals lost during exercise by eating fruits or vegetables, a better choice than salt tablets.