She will compare the fat mass to the non-fat mass in her body.
To most accurately measure her body composition, Claudia should compare her fat mass to her non-fat mass in her body. This can be done through methods such as dual-energy X-ray absorptiometry (DXA), bioelectrical impedance analysis (BIA), or skinfold measurements using calipers. These methods provide a more precise measurement of the percentage of fat mass and non-fat mass in the body, giving a better understanding of body composition than simply comparing height, waist circumference, weight, or weightlifting capabilities.