y calories, rather than fat, and protein? The answer can be explained through understanding the way the body uses the calories that you consume throughout the day.Physiology of Weight LossUnderstanding weight loss and weight gain is not that difficult. In fact, your body works much like an automobile . Let me clarify what I mean. When you put gas in a car you fill up the gas tank so that your engine will run. Likewise, you do the same for your body each time you eat a meal. By eating, you fill your body up with calories so that you can continue to complete the necessary basic functions for life. As with a car, the body will eventually run out of gas or energy. When this occurs you will become hungry, and you will meet this need by filling your body up again by consuming more calories. However, there is one major difference between the filling process of a car and that of the body. In a car you can only fill the tank with so much gas, because there is a certain amount of fuel the gas tank will hold. The body, on the other hand, has an unlimited amount of space; therefore, it is capable of storing excess amounts of fuel as fat. For example, when you sit down to eat your body begins to take in calories or energy that it needs to function. When you exercise you burn or use up those calories. Therefore, we can conclude that as long as you burn as many calories as you take in you will not induce weight gain. However, when you eat more calories than you burn, the addition of those added calories will lead to weight gain in the body. As a matter of fact, if you burn more calories than you eat, you will create a negative caloric balance, and therefore lose weight. Because this energy balance must be constantly maintained in the body, we as humans must continually fill our tanks with the adequate amount of fuel. To finish the example of the car, when we take in fuel (or calories) our tank, or our caloric needs begins to fill up. ...
