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

Abstract Objective It 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 index (BMI). Methods %FM was assessed under control, dehydration, exercise, water, food intake 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) women 17, 22.5 3.4 separately. Results For all devices, there were no differences in values between control other (− 1.9 0.4%, p > 0.05). Across five conditions, 97% of tests returned within 5% (2 tests), 86% 2% despite an assumption. The errors greatest dehydration more likely have a difference greater than using hand-to-foot device (Tanita TBF-314: 59% versus 9%). There when examined BMI (overweight/obesity: − 2.8 0.1% normal weight: 1.7 0.5%; BMI*trial, 0.99). Conclusion estimates similar preliminary across range different BMIs. minor variations are smaller would be expected day-to-day variability weight loss intervention but may larger men.