What is the best replacement fluid to use for exercise under 60 minutes?

When exercising for less than 60 minutes, the best replacement fluid is plain water. During this duration, the body primarily loses water through sweat without excessive depletion of electrolytes. The primary goal in hydration for activities of this length is to maintain proper fluid balance, and water effectively fulfills this need.

Using plain water helps to prevent dehydration without adding unnecessary sugars or calories that may be present in sports drinks or electrolyte solutions. These beverages are more suited for longer-duration or high-intensity workouts, where the body loses significant amounts of electrolytes and requires carbohydrate replenishment.

While carbonated water is hydrating, it may not be as effective for hydration during exercise because the carbonation can lead to discomfort or bloating for some individuals. Overall, for short-duration exercises, plain water is the most efficient and straightforward choice.