No differences in the body fat after violating core bioelectrical impedance measurement assumptions

BMC Public Health

Adam S. Fogel¹  Jennifer L. Kuk¹  Arshdeep K. Randhawa¹  Veronica Jamnik¹  Michael D. T. Fung¹ 

[1] Sherman Health Science Research Centre, School of Kinesiology and Health Science, York University, Rm 2002, 4700 Keele Street, M3J 1P3, Toronto, ON, Canada;

关键词: Bioelectrical impedance;    Obesity;    BMI;    Body fat;    Impedance;    BIA assumptions;   

DOI  :  10.1186/s12889-021-10552-y

来源: Springer

【 摘 要 】

ObjectiveIt is unclear to what degree acutely violating bioelectrical impedance analysis (BIA) measurement assumptions will alter the predicted percent fat mass (%FM) and whether this differs by sex or body mass index (BMI).Methods%FM was assessed under control, dehydration, exercise, water, food intake and non-voided bladder conditions with three BIA devices (Tanita: BC-418, TBF-314, & Omron HBF-306CN) for men (n = 23, age: 24.0 ± 5.2 years old) and women (n = 17, age: 22.5 ± 3.4 years old) separately.ResultsFor all BIA devices, there were no differences in the %FM values between the control and the other conditions in men or women (− 1.9 to 0.4%, p > 0.05). Across the three devices and five conditions, 97% of %FM tests returned values within 5% of control (2 tests), and 86% of tests were within 2% of control despite violating an assumption. The errors were greatest with dehydration and women were more likely to have a %FM difference greater than 2% than men with dehydration using the hand-to-foot device (Tanita TBF-314: 59% versus 9%). There were no differences in %FM between control and the conditions when examined by BMI (overweight/obesity: − 2.8 to 0.1% and normal weight: − 1.7 to 0.5%; BMI*trial, p = 0.99).Conclusion%FM estimates were similar despite acutely violating the preliminary measurement BIA assumptions across a range of different BMIs. The minor variations in %FM are smaller than what would be expected with day-to-day variability or weight loss intervention but may be larger in women than men.

【 授权许可】

CC BY