Body composition refers to the different components that make up a person's body, primarily focusing on the proportions of fat, muscle, bone, and water. It is often expressed as a percentage, indicating how much of the body is made up of fat compared to lean mass. Understanding body composition is important for assessing overall health and fitness levels. Measuring body composition can be done through various methods, such as bioelectrical impedance analysis, dual-energy X-ray absorptiometry (DEXA), or skinfold measurements. These assessments help individuals and health professionals track changes in body composition over time, which can be useful for setting fitness goals and monitoring health.