A commonly used body composition measurement that assesses the ratio of fat to lean mass is the body fat percentage. Various methods can measure body fat percentage, including skinfold calipers, bioelectrical impedance analysis, and dual-energy X-ray absorptiometry (DEXA). Understanding body composition is vital for evaluating health and fitness levels, as it provides insight into body weight distribution beyond the total weight alone. This information helps in tailoring fitness programs and nutrition plans to achieve specific health and fitness goals.