Personalized Indirect Calorimeter for Energy Expenditure (EE) Measurement

Francis Tsow*, Erica Forzani*, Nongjian Tao**, Xiaojun Xian, Ashley Quach, Devon Bridgeman

Background and aims: A personal indirect calorimeter allows everyone to assess resting and non-resting energy expenditure, thus enabling accurate determination of a person’s total calorie need for weight management and fitness. The aim of this study is to compare the performance of a new personal metabolic rate tracker based on indirect calorimetry, Breezing®, with the Douglas bag method, the gold standard method for energy expenditure (EE) measurement.

Methods: Energy expenditures (EE) at rest and during activities, and respiratory quotient (RQ) were measured for 12 healthy subjects, including 7 male and 5 female under different living conditions. A total of 314 measurements were performed with Breezing®, and the results were compared with those by the Douglas bag method.

Results: R-squared correlation coefficients (R2) between the data obtained with Breezing® and the Douglas bag method were 0.9976, 0.9986, 0.9981, and 0.9980, for VO2, VCO2, EE, and RQ respectively.

Conclusions: The EE and RQ values determined by Breezing® are in good agreement with those by the Douglas bag method.

Keywords: Indirect calorimetry; Metabolism tracker; Energy expenditure; Respiratory quotient

Published on: Mar 29, 2015 Pages: 4-8

Full Text PDF Full Text HTML DOI: 10.17352/2455-8583.000007
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