Comparison of the BodyGem, Harris Benedict prediction equation, and a metabolic cart on resting energy expenditure

Abstract

The purpose of this study was to compare measurements of resting energy expenditure (REE) via indirect calorimetry using the BodyGem with measurements from a metabolic cart and the Harris-Benedict equation. Participants were 25 women (12) and men (13) aged 21-39 years who were tested on one occasion. Results indicated mean REE (kcal•day-I) for the metabolic cart, BodyGem, and Harris-Benedict equation were 1,321. 7, 1,280.5, and 1,609.7 kcal•d-1, respectively. Pearson correlation coefficients (r) were significant ranging from r=0.64 to r=0.98 for weight, height, and body mass index compared to REE measurements. There was a significant difference in mean REE between the metabolic cart and Harris-Benedict equation, but no significant difference between the BodyGem and the metabolic cart. Therefore, it was concluded that the BodyGem provided an accurate method to measure REE and the Harris-Benedict equation should not be used if other methods are available.