Nutrition > Diet Right > Carbohydrates

After all that exercise, your body has lost some fluid and you might be a little dehydrated. Dehydration is a condition that occurs when a person loses more fluids (such as urine or sweat) than he takes in. To feel your best, you need to replace that fluid. Dehydration is nowhere near as serious a problem for teens as it can be for babies or young children, but if you ignore your thirst, dehydration can slow you down.When someone gets dehydrated, it means the amount of water in his body has dropped below the proper level (our bodies are about two thirds water).

Proteins give your body power to build new tissues and fluids, among other functions. Your body cannot store extra protein, so it burns it for energy or converts it to fat.

There are three levels of dehydration: mild (where you can lose 3% to 5% of your body weight), moderate (6% to 9%), and severe (10% or more). The most common cause of dehydration in teens is gastronomical illness, sometimes called the stomach flu.