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Bioelectrical impedance analysis for the estimation of body composition in rats

Publication Date
  • Veterinary Sciences
  • Zoology
  • Bioelectrical Impedance
  • Body Composition
  • Rats
  • Obesity
  • Fat-Free Mass
  • Water
  • Fat
  • Bioimpedance
  • Weight
  • Design


Bioelectrical impedance analysis (BIA) was used to assess body composition in rats fed on either standard laboratory diet or on a high-fat diet designed to induce obesity. Bioelectrical impedance analysis predictions of total body water and thus fat-free mass (FFM) for the group mean values were generally within 5% of the measured values by tritiated water ((H2O)-H-3) dilution. The limits of agreement for the procedure were, however, large, approximately +/-25%, limiting the applicability of the technique for measurement of body composition in individual animals.

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