Efeito da hidratação e da alimentação de rotina nos parâmetros da bioimpedância elétrica

Abstract

Introduction: The main bioimpedance guidelines present a series of previous recommendations regarding hydration and food consumption that may limit the use of this technique in clinical practice and population studies. Objective: To evaluate the effect of hydration and routine feeding on electrical bioimpedance parameters Methodology: Participants were selected for convenience. Healthy participants older than five years of both sexes were included in the study. All collections were performed at the place suggested by the participant himself so that no routine changes would occur. On the first day only the hydration protocol was performed, while on the second meeting the diet and exercise protocol. Body composition was evaluated by bioimpedance using the Ottoboni® Biospace Model: InBodyS10, with applied current of 100μA (1KHz), 500μA (other frequencies). The reproducibility and effect of the studied exposures were evaluated using the Bland-Altman model. Results: In the hydration protocol, the mean difference in fat percentage (FP) was -0.50 (P = 0.05), the lower limit of agreement was -3.60%, and the upper limit of agreement was 2.61%. In the food protocol, the mean difference in FP was 0.002 (P = 0.99), the lower limit of agreement was -3.20%, and the upper limit of agreement was 3.20%. Conclusion: Our study shows that ad libitum food and liquid intake do not cause a change above clinically acceptable levels in the FP estimated by bioimpedance.