Which body fat measurement method uses electrical impulses to estimate body fatness?

Bioelectrical Impedance Analysis (BIA) is the method that uses electrical impulses to estimate body fatness. This technique involves sending a small, harmless electrical current through the body, which measures the resistance (impedance) of the body's tissues to the current. Since fat tissue conducts electricity poorly compared to lean tissue (which is more hydrated and thus conducts electricity better), the resistance values can be used to estimate body composition – specifically the amount of body fat and lean mass.

BIA is favored for its relative ease of use, portability, and non-invasive nature. In clinical and fitness settings, it provides results quickly and can often be performed in various environments without the need for specialized facilities.

The other measurement methods, while effective in assessing body composition, do not rely on electrical impulses. Skinfold measurement uses calipers to measure the thickness of skinfolds at specific body sites. Dual X-ray absorptiometry utilizes low-dose X-rays to differentiate between bone, fat, and lean tissue. Hydrostatic weighing involves measuring body density through water displacement. Each of these methods has its own advantages and applications, but they do not employ electrical impulses for measuring body fatness.