Validity and accuracy of regional bioelectrical impedance devices to determine whole-body fatness

摘要: Abstract Objective Growing emphasis on obesity as a risk factor for chronic diseases and commercial availability of impedance devices the at-home assessment body fatness have stimulated need critical evaluation validity these instruments. This study determined reproducibility accuracy two that use upper (hand-to-hand) or lower (foot-to-foot) contact electrode placements in adults with wide range fatness. Methods Body composition was assessed dual x-ray absorptiometry apparently healthy (62 women 48 men) ages 21 to 60 y, mass index 18.6 40.5 kg/m2. Variability predicted regional 10 5 consecutive d. A 50-kHz, tetrapolar bioelectrical plethysmograph surface limbs used determine reference whole-body values. Results (1%) over d less than (2–10%) (3–5%) devices. Regional values were different (P Conclusion Use assess is limited by lack precision accuracy.