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Exercise Physiologist and Registered Nurse
Laurie O'Connor |
Q: What's the value in sports drinks compared to good old-fashioned, free water?
Exercise physiologist and registered nurse Laurie O'Connor weighs in on the pros and cons of sports drinks versus water.
Be conscious of how many calories are in sports drinks. Sometimes they have just as many as a soda. If you are not exercising or not exercising hard enough and/or long enough, drinking a sports drink will actually add more calories than you burn.
So, when should you add a sports drink to your workout?
- Continious aerobic activity for at least 60 minutes. The sugar in the sports drinks will replenish your glycogen stores.
- Training at a high intensity for longer than 30 minutes. Again the extra sugars will replenish your glucose level for continued energy.
- Training outside in the heat. You tend to lose more water/sodium through excessive sweating as well as burn more glycogen. Both need to be replaced.
What should I look for in a sports drink?
- When you are training over an hour at medium to high intensity, look for a drink that provides between 13 - 19 grams of carbohydrates per cup. This will help delay fatigue by topping off blood glucose levels for active muscles.
- Sodium is added not just to replace salt loss in sweat, but to enhance fluid reabsorption in the intestines. Sodium also improves the taste of sports drinks. This sodium will help increase blood volume, which will help to increase endurace. Look for 80 - 110 mg of sodium per cup, possibly even more for longer duration training or if you tend to lose a lot of salt in your sweat.
You should begin drinking a sports drink ten minutes prior to exercising since it can take 10 - 20 minutes to be absorbed. Never wait until you are thirsty, no fluid is instantly absorbed.
The colder the sports drink, the better. You actually burn more calories from drinking a cold beverage because the body has to work to raise the temperature of the drink. |