When the calories you eat equal the calories you burn, you maintain your weight. Eating more calories than you burn results in weight gain. Burning more calories than you eat results in weight loss. Calorie Expenditure is the amount of energy your body uses to do anything. For example, you burn calories when you walk, swim, sleep, read and breathe.
Dehydration is the condition that occurs from a loss in body water.
The main cause of dehydration during activity is an increase in sweat production without adequate fluid intake. The greatest risk for dehydration occurs when you exercise in the heat. To learn more about fluid replacement, visit the Nutrition Center. Fitness is a general term with many meanings. In general, physical fitness is the ability to do daily activities without feeling overly tired.