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 ?
63, assessed by doubly labeled water (Ekelund et al.
1997) A 7 day activity diary for assessment of daily energy expenditure validated by the doubly labeled water method in adolescents.
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.
The study compared SenseWear(R) to the doubly labeled water method, considered the gold standard in measuring energy expenditure (EE), and found that the SenseWear(R) armband offers similar accuracy.