To eat or not to eat: does it affect fat-free mass measured by bio-impedance?
M. Leever-Harkema, M. T. van Hoogdalem, E. Eringa, A. Dijkstra, J. B. Wempe, N. H. T. Ten Hacken (Groningen, The Netherlands)
Source: Annual Congress 2004 - Lung function technology: beyond the basic test
Session: Lung function technology: beyond the basic test
Session type: Thematic Poster Session
Number: 2483
Disease area: Airway diseases
Abstract Introduction The measurement of bio-impedance is a simple and validated way to assess fat free mass (FFM). Because a meal theoretically may affect the electrical conductivity of the body, subjects normally are asked not to eat or drink two hours prior to testing.Aim To investigate if a meal affects the FFM in healthy subjects, as assessed by bio-impedance measurements.Method 29 Healthy subjects were investigated: 22 women and 7 men, with a mean age of 35 years, and a mean BMI of 23 kg/m². Bio-impedance and weight were measured half an hour before, and one and three hours after consuming a hot meal and drinking 450 ml water. Bio-impedance was measured with the Bodystat ® 1500 (Bodystat, England).Results
Conclusion A hot meal increases the Fat Free Mass as measured by bio-impedance. However, the increases are small as compared to the normal intra-individual variability of the measurement and the improvements seen during pulmonary rehabilitation. Therefore, we allow our patients to have a light meal before testing.
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M. Leever-Harkema, M. T. van Hoogdalem, E. Eringa, A. Dijkstra, J. B. Wempe, N. H. T. Ten Hacken (Groningen, The Netherlands). To eat or not to eat: does it affect fat-free mass measured by bio-impedance?. Eur Respir J 2004; 24: Suppl. 48, 2483
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