How are some electronic scales able to measure body fat or bone density?
In: Technology
Body fat scales use a technology called bioelectrical impedance analysis to measure body fat.
A small, unnoticeable electrical current is sent from one foot, up one leg and down the other leg. Fat is a poor conductor of electricity compared to other components of the body such as muscle. The more resistance the electrical current experiences, the higher the fat.
They are not particularly accurate, I believe.
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