Bioelectrical Impedance Analysis (BIA): Calculation & Understanding

Bioelectrical impedance analysis is a method for determining how the body responds to the flow of electricity through body tissues. The impedance to that flow can be used to estimate total body water, which can indicate fat-free body mass and body fat. You'll need a special type of analyzer to calculate bioelectrical impedance, but using one is straightforward.

Things You'll Need

• Bioelectric impedance analyzer
• Rubbing alcohol
• Cotton swabs

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Instructions

• 1

  Lay down on your back on a nonconducting surface without your arms touching your trunk or your thighs touching each other.

• 2

  Remove your socks, shoes and any metallic objects on your body.

• 3

  Clean the top of the hand and wrist with rubbing alcohol.

• 4

  Clean the top of the foot and the ankle with rubbing alcohol.

• 5

  Place two of the device's electrodes on your right and left hand or wrist. Consult the owner's manual to determine if you place them on your hands or wrists.

• 6

  Place the other two electrodes on your right and left ankle or foot. Consult the owner's manual to determine if you place them on your ankles or feet.

• 7

  Turn on the analyzer.

• 8

  Wait about 10 seconds and then consult the analyzer's reading to determine the bioelectrical impedance measure.