Being overweight because of a preponderance of bone and muscle does not have the same meaning as being overweight because of fat tissue.Quite often, an improvement in physical fitness is accompanied by a reduction in body fat.Even when exercise does not result in the loss of weight the amount of body fat may reduce.This is because the relative proportions of lean body weight and fat change.The stored fat in the body is reduced, and the lean body weight (primary muscles) is increase.
Body fat and lean body weight can be measure quite accurately in the laboratory.However, because of the elaborate equipment, complex procedures, and substantial time required to test each individual,these methods are not widely used.As a result, researchers have developed othermeans for estimating body fat that are closely related the complex laboratory techniques.Fortunately, simple methods using skinfold calipers are quite suitable for determining lean body weight and fat weight.