BIA measures an individual’s impedance or resistance to the electrical signal as it travels through the water that is found in muscle and fat.
The more muscle a person has, the more water their body can hold and the greater the amount of water in a person’s body, the easier it is for the electrical signal to pass through it.
The more fat an individual has, the more resistance they have to the electrical signal. BIA is safe and a large majority of the population cannot feel the electrical signal at all, however weight only mode should be used for those with pace makers.
The human body is mainly composed of body fat and lean body mass.
Lean body mass is divided into protein, mineral, and body water.
Protein is a main element of muscle while minerals are commonly found in bones.