KEY POINTS:rn1)The ideal fluid replacement beverage is one that tastes good to the athlete, does not cause gastrointestinal discomfort when consumed in large volumes, promotes rapid fluid absorption and maintenance of extracellular fluid volume, and provides energy to working muscles.rn2)Sports drinks containing 6-8 percent carbohydrate maintain circulatory and thermoregulatory function during exercise as well as plain water and provide greater performance benefits than water.rn3)The small amount of sodium provided by many sports drinks may help maintain fluid and electrolyte balance during prolonged exercise in the heat.rn4)Flavored, sweetened beverages encourage voluntary fluid consumption, a response that helps ensure adequate fluid intake during exercise in the heat.