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Updated: May 28, 2026

Using a Combination of Indirect Calorimetry, Infrared Thermography, and Blood Glucose Levels to Measure Brown Adipose Tissue Thermogenesis in Humans
Published on: June 2, 2023
Inconspicuous assessment of diet-induced thermogenesis using whole-body indirect calorimetry
Hideaki Kumahara1, Hiroaki Tanaka, Yves Schutz
1Faculty of Nutritional Sciences, Nakamura Gakuen University, Jounan-ku, Fukuoka, Japan. hideakik@me.com
Abstract:
We report a novel technique for computing diet-induced thermogenesis using data from 24-h respiration chamber measurements of 76 subjects. Physical activity (PA) was determined using a radar system to assess its duration and an accelerometer to evaluate its intensity. The regression line relating PA and energy expenditure facilitated calculation of the integrated thermogenic response to the total energy ingested (11.4% ± 3.8%), which is consistent with the values classically reported in the literature (10%) at the group level.
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