Most of us can slot our overall build into one of three general categories, or somatotypes, recognizing that there are a wide variety of shapes and sizes even within these categories.
Body composition is liberating because it gives you something to focus on in a good way—lean body mass. No matter what the scale says, if you’re in a healthy body-composition range, you’re all good! Your ideal body composition depends on your goals. If you’re a competitive athlete, your aim is likely the lower end of the body-fat percentage scale (again, taking your somatotype into consideration), but remember that you are never gunning for zero fat, and lower is not always better.
Excerpted from prevention.com