Proposed shorter duration protocols for measuring resting energy expenditure utilizing whole-room indirect calorimetry.

Background: Sixty minutes is currently the shortest testing duration for 24-h resting energy expenditure (24-h REE) utilizing whole-room indirect calorimetry.

Objective: Show that recalculated 30-min extrapolated 24-h REE from previously published 60-min metabolic data are valid.

Methods: Propane consumption linearity was determined through an 8-h combustion test.

Dietary sulfur amino acid restriction in humans with overweight and obesity: a translational randomized controlled trial.

Background: Dietary sulfur amino acid restriction (SAAR) improves metabolic health in animals. In this study, we investigated the effect of dietary SAAR on body weight, body composition, resting metabolic rate, gene expression profiles in white adipose tissue (WAT), and an extensive blood biomarker profile in humans with overweight or obesity.

Methods: N = 59 participants with overweight or obesity (73% women) were randomized stratified by sex to an 8-week plant-based dietary intervention low (~ 2 g/day, SAAR) or high (~ 5.

Validity and reproducibility of a whole-room indirect calorimeter for the estimation of VO , VCO , and resting metabolic rate.

Whole-room indirect calorimeters (WRICs) provide accurate instruments for the measurement of respiratory exchange, energy expenditure, and macronutrient oxidation. Here, we aimed to determine the validity and reproducibility of a 7500 L WRIC for the measurement of ventilation rates and resting metabolic rate (RMR). Technical validation was performed with propane combustion tests (n = 10) whereas biological reproducibility was tested in healthy subjects (13 women, 6 men, mean ± SD age 39.

Validation of energy expenditure and macronutrient oxidation measured by two new whole-room indirect calorimeters.

Objective: The aim of this study was to validate two new whole-room indirfect calorimeters according to Room Indirect Calorimetry Operating and Reporting Standards (RICORS 1.0).

Methods: For technical validation, 16 propane combustion tests were performed to determine accuracy and precision of energy expenditure (EE) and ventilation rates of oxygen (VO ), carbon dioxide (VCO ), and respiratory exchange ratio (VCO /VO ).

Validation of whole room indirect calorimeters: refinement of current methodologies.

Whole room indirect calorimeter (WRIC) validation techniques consist of propane combustion (PC) or infusion of mixed carbon dioxide (CO) and nitrogen (N) by a precision blender (PB). To determine the best method, PC of 6, 10, 22-h and PB infusions of 6, 10, and 14-h, were conducted. The 14-h infusion consisted of two metabolic settings.