underwater weighing


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un·der·wat·er weigh·ing

(ŭn'dĕr-waw'tĕr wā'ing)
Assessment of body volume by measuring a person's weight in air and again under water; loss of scale weight (corrected for water density) equals body volume. Body density (body mass:volume ratio) is then used to compute percent body fat.
Synonym(s): densitometry, hydrodensitometry, hydrostatic weighing.
References in periodicals archive ?
Validity of this approach has been demonstrated in children, with two or more skinfolds at different sites having high correlation with estimation of body fatness from underwater weighing (Harsha, 1978).
fat quantities ranged from 10 5 percent with DEXA (a highly accurate method used primarily in research facilities), 9 percent with underwater weighing, 8.
The most accurate test, underwater weighing, is also the most cumbersome and thus is not available except in some hospitals and research labs.

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