Final answer:
For exercise over 60 minutes, ACSM suggests 3-8 fl oz sports beverage every 15-20 minutes to rehydrate and replenish electrolytes, especially sodium for fluid uptake and improved hydration.
Step-by-step explanation:
The American College of Sports Medicine (ACSM) provides guidelines for fluid intake during extended periods of exercise. For exercise lasting longer than 60 minutes, the ACSM recommends the consumption of 3-8 fl oz of a sports beverage every 15 to 20 minutes. These sports drinks are designed to not only rehydrate the body but also replenish electrolytes like sodium and potassium, which are lost through sweat. Having 125 milligrams of sodium per 8 ounces of sports drink is beneficial as it aids in replenishing some of the sodium lost and promotes fluid uptake in the small intestine, improving hydration.