Comparison of Methods for Achieving 24-Hour Energy Balance in a Whole-Room Indirect Calorimeter
نویسندگان
چکیده
منابع مشابه
Reproducibility of 24 h energy expenditure measurements using a human whole body indirect calorimeter.
Ten female subjects completed two similar experimental procedures (periods 1 and 2) to obtain values of reproducibility of energy intake and 24 h energy expenditure (24hEE) measurements in a whole body indirect calorimeter. The periods consisted of consumption of a provided weight-maintenance diet for 6-8 d, faeces and urine collection during the last 4 d and occupation of the calorimeter durin...
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BACKGROUND The most common methods for obtaining human resting metabolic rate (RMR) use either a ventilated hood connected to a metabolic cart (VH_MC) or calculation by many prediction equations utilizing the person's height and weight. These methods may be inherently inaccurate. The objective of this study is to compare the accuracy for the measurement of RMR by three methods: a new whole room...
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Indirect calorimetry involves measurement of CO(2) produced and O(2) consumed by an organism. These measurements are then used to calculate energy output, metabolic rate (MR), and respiratory quotient (RQ), a relative assessment of carbohydrate and lipid oxidation. By far the most difficult aspect of indirect calorimetry is measurement of O(2). Moreover, the abundance of O(2) (20.95%) relative ...
متن کاملA human calorimeter for the direct and indirect measurement of 24 h energy expenditure.
1. A calorimeter for the continuous measurement of heat production and heat loss in the human subject, for at least 24 h, is described. The calorimeter operated on the heat-sink principle for direct calorimetry and an open-circuit system for indirect calorimetry. 2. Sensible heat loss was measured using a water-cooled heat exchanger, and the temperature of water entering the heat exchanger was ...
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ژورنال
عنوان ژورنال: Obesity Research
سال: 2003
ISSN: 1071-7323
DOI: 10.1038/oby.2003.105