Types of Sports Drinks
Sports drinks (not to be confused with an energy drinks) are formulated to rehydrate, replace electrolytes, and extend endurance over long periods of time. Sports drinks fall into three classes and each one has a different use. They can either be hypotonic, isotonic or hypertonic depending on the concentration of carbohydrates.
Sports Drink Classifications:
Hypotonic Drinks: Drinks with a carbohydrate concentration less than 6% are hypotonic. They are rapidly absorbed and are good for fluid replacement during and after shorter periods of exercise. They are generally lower in calories than other sports drinks and therefore not as good for prolonged exercise.
Isotonic drinks: Most commercially available sports drinks are isotonic, which means they have a 6-8% carbohydrate concentration. Isotonic drinks are absorbed rapidly, and also provide fuel for prolonged exercise. They can be used before, during and after exercise.
Hypertonic drinks: Hypertonic drinks have a carbohydrate concentration greater than 8%. An example of a hypertonic drink is fruit juice, which is absorbed slowly, and shouldn’t be used during exercise because it can cause stomach cramps and bloating. Hypertonic drinks are best used several hours before or after exercise.
