Does the average consumer derive any real benefit from specialized liquid nutrition drinks? It's a marketing gimmick, pure and simple. Most health experts agree that liquid nutrition drinks have electrolytes and sodium that are beneficial to professional athletes and marathoners, but have little value to the average user. There's a certain appeal in drinking what Olympic athletes drink, but it should be just water if you're doing 10 minutes on a treadmill. And because many enhanced waters contain only small amounts of essential nutrients, consumers should look elsewhere for nutrition. That's what we have food for!
Consider that a loss of as little as 2% of one's body weight due to sweating, can lead to a drop in blood volume. When this occurs, the heart works harder in order to move blood through the bloodstream. Prehydration and rehydration are vital to maintaining cardiovascular health, proper body temperature and muscle function.
Liquid nutrition drinks can be helpful to athletes who are exercising at a high intensity for 90 minutes or more. Fluids supplying 60 to 100 calories per 8 ounces helps to supply the needed calories required for continuous performance. It's really not necessary to replace losses of sodium, potassium and other electrolytes during exercise since you're unlikely to deplete your body's stores of these minerals during normal training. If, however, you find yourself exercising in extreme conditions over 5 or 6 hours (an Ironman or ultramarathon, for example) you will need to add a complex health drink with electrolytes.
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