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A marathon runner consumes a sports drink every 20 minutes during a race. What is the main advantage of...

A marathon runner consumes a sports drink every 20 minutes during a race. What is the main advantage of this strategy?
It provides carbonation that speeds cooling through respiration.
It boosts insulin production for quick sugar conversion.
It prevents water absorption and slows fatigue onset.
It replaces electrolytes lost in sweat to support muscle contraction.

Answer

The main advantage of consuming a sports drink every 20 minutes during a marathon is that it replaces electrolytes lost in sweat to support muscle contraction. During intense physical activity, such as running a marathon, athletes lose not only water but also essential electrolytes, including sodium, potassium, and magnesium, through sweat. Maintaining the right balance of electrolytes is crucial for muscle function, preventing cramping, and sustaining energy levels. Sports drinks are formulated to provide these necessary electrolytes, along with carbohydrates for energy, thus helping to delay fatigue and improve overall performance during prolonged endurance events.

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