Your body perspires to cool itself down during exertion, which means you lose water during exercise. The body can lose several litres of water during a one-hour period of exercise, so you’ll need to replace that water or face the effects of dehydration. Of course, water isn’t the only nutrient you lose during exercise. Sweat also contains both sodium and potassium, which can be a concern during longer periods of exertion, such as a marathon.

Your body perspires to cool itself down during exertion, which means you lose water during exercise. The body can lose several litres of water during a one-hour period of exercise, so you’ll need to replace that water or face the effects of dehydration. Of course, water isn’t the only nutrient you lose during exercise. Sweat also contains both sodium and potassium, which can be a concern during longer periods of exertion, such as a marathon.

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