Validity and reproducibility of a whole-room indirect calorimeter for measurement of the thermic effect of food.

ABSTRACT: Whole-room indirect calorimeters (WRICs) measure respiratory exchange, energy expenditure, and macronutrient oxidation. The thermic effect of food (TEF) that occurs after food intake due to digestion, absorption, and storage of nutrients is an important component of daily energy expenditure, but difficult to quantify using metabolic carts. This study evaluated the validity and reproducibility of a 7209 L WRIC for TEF measurement. Technical validation was performed with 7-h propane combustion tests (n = 5), and biological reproducibility was tested in 10 healthy subjects (6 men, mean age 33.5 ± 10.3 years) in replicate 7-h measurements, after a 3-day run-in protocol. Coefficient of variation (CV) and intraclass correlation coefficient (ICC) were calculated for ventilation rates of O_2</

SUBMITTER: Minge MM 

PROVIDER: S-EPMC12917861 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature