The Role of Heart Rate on the Associations Between Body Composition and Heart Rate Variability in Children With Overweight/Obesity: The ActiveBrains Project

Overview

Journal Front Physiol

Date 2019 Aug 6

PMID 31379602

Citations 11

Authors

Abel Plaza-Florido

Jairo H Migueles

Jose Mora-Gonzalez

Pablo Molina-Garcia

Maria Rodriguez-Ayllon

Cristina Cadenas-Sanchez

Irene Esteban-Cornejo

Socorro Navarrete

Rosa Maria Lozano

Nathalie Michels

Jerzy Sacha

Francisco B Ortega

Affiliations

Soon will be listed here.

Abstract

Background: Heart rate variability (HRV) is negatively associated with body mass index and adiposity in several populations. However, less information is available about this association in children with overweight and obesity, especially severe/morbid obesity, taking into consideration the dependence of HRV on heart rate (HR).

Objectives: (1) to examine associations between body composition measures and HRV, (2) to study differences in HRV between children with overweight and severe/morbid obesity; and (3) to test whether relationships and differences tested in objectives 1 and 2, respectively are explained by the dependency of HRV on HR.

Methods: A total of 107 children with overweight/obesity (58% boys, 10.03 ± 1.13 years) participated in this study. Body composition measures were evaluated by Dual-energy X-ray absorptiometry (DXA). HRV parameters were measured with Polar RS800CX.

Results: Body composition measures were negatively associated with HRV indicators of parasympathetic activity (β values ranging from -0.207 to -0.307, all < 0.05). Children with severe/morbid obesity presented lower HRV values with respect to children with overweight/mild obesity in HRV parameters indicators of parasympathetic activity ( = 0.035). All associations disappeared after further adjustment for HR (all > 0.05).

Conclusion: All associations between adiposity/obesity and HRV could be explained by HR, suggesting a key confounding role of HR in HRV studies in children with weight disturbances.

Citing Articles

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