Body composition is the ratio of lean body mass to fat body mass.
Body composition consists of lean body mass and body fat. Lean body mass is made up of structural and functional elements in cells, body water, muscle, bones, and other body organs such as the heart, liver and kidneys. Storage fat makes up the remainder of our fat reserves and is the part that many people are always trying to shed. The purpose of measuring body composition is to determine an individual's body fat, lean body mass and body hydration level. This is conducted using the Bioelectrical Impedance Analyzer.