Which measurement technique assesses body fat using electrical signals?

Bioelectrical impedance is a technique that measures body fat by sending a small electrical current through the body. The resistance to this current is measured; fat tissue, being less conductive than lean tissue, affects the flow of the current. The more resistance encountered, the higher the estimated body fat percentage, as the body's composition influences how easily the electric signal travels through. This method is popular for its non-invasive nature, ease of use, and relatively quick process to obtain results compared to other techniques.

In contrast, DXA scans use dual-energy X-ray absorptiometry to provide detailed imaging of body composition but do not utilize electrical signals. Hydrostatic weighing involves measuring body density through water displacement, which does not involve electrical currents either. Skinfold calipers measure the thickness of skinfolds at specific body sites to estimate body fat percentage but rely solely on physical measurements rather than electrical signals.