Inconspicuous assessment of diet-induced thermogenesis using whole-body indirect

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 accel- erometer to evaluate its intensity. The regression line relating PA and energy expenditure facilitated calculation of the inte- grated 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.