Home > Technology > BIA Technology When body water is measured using a single impedance value, assuming the body to be a single cylinder, there is a higher chance of error. Body mass distribution and metabolic characteristics differ between arms, legs, and trunk and cannot be identified using a single frequency, yielding a higher error rate. InBody separates the body into 5 different cylinders with respect to the arms, legs, and trunk, and calculates the impedance of each. The InBody provides accurate results not only for healthy individuals but also for children, elderly, severely obese, athletes, and patients. figure> The difference of regarding a body as a single cylinder and five cylinders. → By partitioning the body into five cylinders, impedance can be measured with respect to the body shape and the different characteristics of the five body segments. The difference between Whole body Impedance and Segmental Impedance; whole body Impedance considers the trunk and the limbs as having the same characteristics and thus a change in a certain region affects the results and creates limits in attaining accurate body composition.