Final answer:
Sports drinks are an appropriate form of hydration in high-intensity endurance training. They help rehydrate the body, prevent fatigue, and provide energy during exercise.
Step-by-step explanation:
Sports drinks are an appropriate form of hydration in high-intensity endurance training. During intense physical activity, the body loses fluids and electrolytes through sweat. Sports drinks contain electrolytes, such as sodium and potassium, which help rehydrate the body and prevent fatigue during exercise. They also provide carbohydrates, which can be used as a source of energy during prolonged workouts.