An appropriate method for measuring body composition is using dual-energy x-ray absorptiometry (DEXA). This method provides detailed information about the distribution of fat mass and lean mass in the body. DEXA scans are accurate and safe, offering insights that can help assess health risks, guide fitness goals, and monitor progress. Other methods include skinfold calipers and bioelectrical impedance analysis (BIA), but DEXA is considered the gold standard for precise measurements in both clinical and research settings.