The BIA tool measures impedance or resistance through the body by attaching electrodes to the hands and feet while the individual is lying down. A small imperceptible signal passes through the body and is able to determine the difference in composition between muscle and fat based on conduction and resistance. Tissues that hold water like muscle are better conductors and allows the current to pass quicker through the body while fat increases resistance and slows the current down. This tool takes into account subcutaneous and visceral fat (the more problematic fat) and through it’s algorithms determines the factors listed below. The height, weight, age, and waist to hip ratio of the patient are all used as objective markers needed to run the test and to monitor progress.