Think of Body Fat as Your Body's Way of Storing Extra Energy (Calories) and Protecting Itself
The scientific term for fat is adipose tissue, your body stores extra energy in the form of fat cells in the adipose tissue.
MYTH: When you exercise your body turns fat into muscle, when you stop exercising, it turns back to fat.
FACT: Fat and Muscle are separate and distinct. When you exercise you may lose fat and gain muscle, and when you stop you may lose muscle and gain fat. They don't transform into eachother.
Some of your body fat is called essential fat because it provides insulation and protects vital organs. Men need at least 2-4% and women need 10-12%. The remainder is called storage fat, and that's what send many of you to the gym. Body fat tends to increase with age.