Sport drinks offer fluids help to offset the loss of fluids during physical activity. Sport drinks also supply glucose.
This glucose can be useful during endurance activity lasting 45 minutes or more, during intense activity or during prolonged competitive games that demand repeated intermittent activity.
Sport drinks can benefit some athletes, especially in hot, humid conditions.
Glucose in sport drinks is a more immediate fuel, or energy, source for working muscles. It may help prevent muscle glycogen from depleting too fast and so help lengthen performance time.
Sport drinks contain a dilute mixture of carbohydrate and electrolytes. Most contain 50 to 100 k-calories per cup, about 3-4 teaspoons of carbohydrate per cup, and small amounts of sodium and potassium.
The first sport drinks was developed with a dual purpose – fluid and energy replacement.
Gastric emptying and therefore water absorption, may be hampered by too much carbohydrate in the beverage so many sports drinks are formulated to provide carbohydrate in a concentration that will not interfere with fluid balance and thermoregulation.
Sport drinks
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