A popular method of measuring body composition is the use of bioelectrical impedance analysis (BIA). This technique estimates body fat percentage by sending a small electrical current through the body and measuring the resistance encountered. Because fat tissue conducts electricity differently than lean mass, BIA provides insights into an individual's fat and lean body mass ratios. Other methods include DEXA scans, skinfold measurements, and hydrostatic weighing. Monitoring body composition is essential for assessing health and fitness levels, guiding nutrition and exercise programming.