Body composition refers to the proportion of fat, muscle, bone, and other tissues that make up an individual's body weight. It provides a more detailed understanding of physical fitness than weight alone, as it distinguishes between lean mass (muscles, bones, organs) and fat mass. A healthy body composition typically features a higher ratio of lean mass to fat mass, which is associated with better metabolic health, improved physical performance, and reduced risk of chronic diseases. Monitoring body composition can guide fitness and nutrition strategies, helping individuals achieve their health and wellness goals more effectively.