doubly labeled water


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doub·ly la·bel·ed wa·ter

(dŭb'lē lā'bĕld waw'tĕr)
Noncalorimetric technique for measuring energy expenditure in free-living subjects using an oral dose of water containingstable nonradioactive isotopes, 2H and 18O. Derived CO2 production is used to calculate energy expenditure using indirect calorimetry formulas.
References in periodicals archive ?
"But our doubly labeled water results didn't match the chamber data.
Black, "Physical activity levels from a meta-analysis of doubly labeled water studies for validating energy intake as measured by dietary assessment," Nutrition Reviews, vol.
Some types of data sets are good only to serve as validation sets, for example, the doubly labeled water data set, where there is only one reading of total energy expenditure every two weeks.
As mentioned earlier, doubly labeled water is the most accurate method to estimate energy expenditure, but provides only one reading per 14 days.
Use of an automated chromium reduction system for hydrogen isotope ratio analysis of physiological fluids applied to doubly labeled water analysis.
Measurement of energy expenditure in humans by doubly labeled water method.
Validation of the doubly labeled water technique for measuring energy metabolism in starlings and sparrows.
(2010) found a significant agreement between the SWA and doubly labeled water estimates of TEE with an intra class correlation of 0.8.
A comparable PAL was found in adolescent speed skaters ranging between 1.58 and 2.63, assessed by doubly labeled water (Ekelund et al., 2002).
Measurement of total energy and material balance in rats by means of doubly labeled water. American Journal of Physiology 199:238-242.
(1996) Physical activity levels from a meta-analysis of doubly labeled water studies for validating energy intake as measured by dietary assessment.
(1990) Simultaneous measurement of free-living energy expenditure by the doubly labeled water method and heart-rate monitoring.