How should fluid intake be managed during endurance exercise to avoid GI distress and maintain hydration?

• A. Drink a large volume at once before exercise.
• B. Drink only when you feel thirsty.
• C. Spread fluid intake to maintain hydration and minimize GI distress.
• D. Avoid fluids during exercise.

Answer: (C)

Managing fluids during endurance exercise means maintaining hydration while keeping GI comfort. The best approach is to spread fluid intake into small, regular sips throughout the activity. This helps preserve blood volume and thermoregulation without overloading the stomach, which can cause GI distress like cramps, nausea, or bloating. Drinking a large volume all at once before or during exercise can sit heavily in the gut and impair comfort and performance, while waiting until you feel thirsty may leave you under-hydrated because thirst lag can mask your actual needs during hard work. Avoiding fluids entirely during exercise leads to dehydration and overheating, which hurts performance and safety. Tailor your intake to the situation by sipping consistently—roughly the amount you can tolerate without feeling bloated—adjusting for temperature, duration, and sweat rate, and consider beverages with electrolytes (and some carbohydrates if the workout is long) to support both hydration and energy needs.