Total energy expenditure is repeatable in adults but not associated with short-term changes in body composition. Academic Article uri icon

Overview

abstract

  • Low total energy expenditure (TEE, MJ/d) has been a hypothesized risk factor for weight gain, but repeatability of TEE, a critical variable in longitudinal studies of energy balance, is understudied. We examine repeated doubly labeled water (DLW) measurements of TEE in 348 adults and 47 children from the IAEA DLW Database (mean ± SD time interval: 1.9 ± 2.9 y) to assess repeatability of TEE, and to examine if TEE adjusted for age, sex, fat-free mass, and fat mass is associated with changes in weight or body composition. Here, we report that repeatability of TEE is high for adults, but not children. Bivariate Bayesian mixed models show no among or within-individual correlation between body composition (fat mass or percentage) and unadjusted TEE in adults. For adults aged 20-60 y (N = 267; time interval: 7.4 ± 12.2 weeks), increases in adjusted TEE are associated with weight gain but not with changes in body composition; results are similar for subjects with intervals >4 weeks (N = 53; 29.1 ± 12.8 weeks). This suggests low TEE is not a risk factor for, and high TEE is not protective against, weight or body fat gain over the time intervals tested.

authors

publication date

  • January 10, 2022

Research

keywords

  • Adipose Tissue
  • Body Composition
  • Energy Metabolism
  • Water

Identity

PubMed Central ID

  • PMC8748652

Scopus Document Identifier

  • 85122850453

Digital Object Identifier (DOI)

  • 10.1038/s41467-021-27246-z

PubMed ID

  • 35013190

Additional Document Info

volume

  • 13

issue

  • 1