Sex Differences in Measures of Energy Expenditure and Body Composition in Young, Middle-Aged, and Older Adults.

ABSTRACT:

Background

Total daily energy expenditure (TDEE) is vital for energy balance and cardiometabolic health, yet its trajectory across the lifespan, particularly in females, remains poorly understood.

Objectives

We sought to examine the effects of aging and sex on body composition and TDEE.

Methods

In a cross-sectional analysis of data from research centers across 9 European Countries and the United States from the International Atomic Energy Agency database, TDEE and body composition measures of 2326 participants (1560W/766M; 50.7 ± 12 .6 y) were stratified across age groups: young (30-39 y; YOUNG), middle-aged (40-54 y; MID), and old (55-70 y; OLD). Doubly labeled water was used to estimate TDEE and fat-free mass (FFM). Fat mass (FM) was calculated as the difference bet

SUBMITTER: Cabre HE 

PROVIDER: S-EPMC12830153 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature