摘要：The Deltatrac™ II Metabolic Monitor (Datex-Ohmeda Inc.) is considered the standard reference machine in indirect calorimetry; however, it is no longer commercially available thus there is a need for new machines. The gas exchange measurement (GEM; GEM Nutrition Ltd) and the ECAL (Health Professional Solutions) are alternative measuring systems. The aim of this study was to compare the ECAL and GEM with Deltatrac for measures of RMR and the GEM to the Deltatrac for measures of diet-induced thermogenesis (DIT). Twenty healthy participants were tested on test day 1 (T1) and test day 2 (T2). RMR was measured in a randomised order for 30 min on the Deltatrac, the GEM and the ECAL. Following this, a 1553 kJ meal was consumed and DIT was measured on the Deltatrac and the GEM in alternating 15 min intervals for 4 h. The GEM reported consistently higher values than the Deltatrac for VO2, VCO2, RMR and fat oxidation (P 2, RMR, carbohydrate oxidation (T2) and respiratory quotient and fat oxidation (T1, T2) (P P
关键词：RMR; Diet-induced thermogenesis; GEM; ECAL; Deltatrac; Abbreviations CHO carbohydrate DIT diet-induced thermogenesis EE energy expenditure GEM gas exchange measurement MCT medium-chain TAG RQ respiratory quotient T1 test day 1 T2 test day 2
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