Body composition relates to overall health by indicating the proportion of fat, muscle, and other tissues in the body. A healthy body composition, characterized by a lower percentage of body fat and higher muscle mass, is associated with reduced risk of chronic diseases, improved metabolic function, and better physical performance. Monitoring body composition can help assess nutritional status and effectiveness of fitness routines. It serves as a more insightful metric than weight alone, as it reflects changes in body structure that are crucial for understanding health and fitness progress.