Journal article
Non-invasive approach for body composition measurement: differential buoyancy method and correction for water loss
Biomedical sciences instrumentation, v 31, pp 219-224
01 Jan 1995
PMID: 7654966
Abstract
The Differential Buoyancy method uses Archimedes' principle to non-invasively determine body fat percentage by measuring the subject's weight in breathable high and low densities atmospheres. We currently use both air and helium/oxygen mixtures in our experiments[1]. When the method was tested on rats, an anomaly was observed. As helium/oxygen mixture was admitted to the weighing chamber, while the atmospheric density monotonically decreased, the rat's weight first increased but then after several minutes decreased. Water loss from the rat's body was found to be the main cause of this anomaly. Therefore it was necessary to compensate for this water loss. Consistent with experimental findings the water loss was modeled as a constant rate process, and determined experimentally from weight measurements at the beginning and at the end of the experiment. Making these corrections allowed for accurate predictions of the rat's volume and body fat percentage.
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Details
- Title
- Non-invasive approach for body composition measurement: differential buoyancy method and correction for water loss
- Creators
- R HananiaS DubinS ZietzA NaimB Schrope
- Publication Details
- Biomedical sciences instrumentation, v 31, pp 219-224
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- [Retired Faculty]
- Scopus ID
- 2-s2.0-0029011812
- Other Identifier
- 991019173665004721