What is the recommendation for fluid intake during exercise lasting more than one hour?

During exercise lasting more than one hour, electrolyte replenishment is crucial for maintaining fluid balance and optimal performance. Prolonged physical activity leads to significant losses of not just water, but also electrolytes such as sodium, potassium, and chloride through sweat. If these electrolytes are not replaced, athletes can be at risk for conditions such as heat cramps, hyponatremia, or other heat-related illnesses.

Electrolyte drinks help to restore the balance of these essential minerals, which play a role in muscle function and the maintenance of hydration. While water intake is important, it alone may not adequately replace the electrolytes that are lost during extended exercise. Carbohydrate drinks can provide energy, but they do not necessarily address the need for electrolyte balance as effectively as a dedicated electrolyte replenishment drink. Therefore, electrolyte replenishment is the most appropriate recommendation for exercise lasting more than one hour to support hydration and performance.