Journal of Applied Physiology
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J Appl Physiol 67: 14-18, 1989;
8750-7587/89 $5.00
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Journal of Applied Physiology, Vol 67, Issue 1 14-18, Copyright © 1989 by American Physiological Society

ARTICLES

Use of doubly labeled water technique in soldiers training for jungle warfare

C. H. Forbes-Ewan, B. L. Morrissey, G. C. Gregg and D. R. Waters
Materials Research Laboratory, Defence Science and Technology Organisation, Scottsdale, Tasmania, Australia.

The doubly labeled water method was used to estimate the energy expended by four members of an Australian Army platoon (34 soldiers) engaged in training for jungle warfare. Each subject received an oral isotope dose sufficient to raise isotope levels by 200-250 (18O) and 100-120 ppm (2H). The experimental period was 7 days. Concurrently, a factorial estimate of the energy expenditure of the platoon was conducted. Also, a food intake-energy balance study was conducted for the platoon. Mean daily energy expenditure by the doubly labeled water method was 4,750 kcal (range 4,152-5,394 kcal). The factorial estimate of mean daily energy expenditure was 4,535 kcal. Because of inherent inaccuracies in the food intake-energy balance technique, we were able to conclude only that energy expenditure, as measured by this method, was greater than the estimated mean daily intake of 4,040 kcal. The doubly labeled water technique was well tolerated, is noninvasive, and appears to be suitable in a wide range of field applications.


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