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What is a body composition test?

A body composition test measures a person’s body-fat  percentage.  Body composition refers to the relative percentage of body weight that is fat versus fat-free mass. Fat-free mass can be defined as body weight except stored fat, and includes muscles, bones, water, connective and organ tissues, and teeth, whereas fat mass includes both essential fat (crucial for normal body functioning) and nonessential fat (storage fat or adipose tissue). Example body composition tests include skinfold tests, bioelectrical impedance, and hydrostastic (underwater) weighing.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.