Spot electrodes are connected to a bioelectrical impedance machine. The electrodes are placed on the hands and bare feet. There is also a professional model available with foot pad electrodes. The person stands in bare feet on the machine. Computer software in the product measures impedance and then uses this and the person's gender, height, fitness level, weight, and, in some cases, age to determine body fat percentage.
First weight appears on the machine and then percent body fat appears.
A person lies on a cot and spot electrodes are placed on the hands and bare feet. An electrical signal is introduced and an impedance value is obtained. This is then entered into an equation to predict percent body fat. Foot Pad Model. The person stands in bare feet on the machine.