Your body is made up of water, fat, protein, carbohydrate and various vitamins and minerals.
Body composition is one measure of a person's overall physical fitness.
Obesity is now recognized as a major, independent risk factor for heart disease. The first two are linked with the risk of heart and blood vessel disease. However, WHR is less accurate than waist circumference and is no longer a recommended measure. The body mass index is a formula to assess a person's body weight relative to height. It's a useful, indirect measure of body composition, because it correlates highly with body fat in most people.