Field use of D sub 2 sup 18 O to measure energy expenditure of soldiers at different energy intakes

Journal Article · Wed Nov 01 04:00:00 EST 1989 · Journal of Applied Physiology (1985); (USA)

OSTI ID:6983866

DeLany, J P; Schoeller, D A; Hoyt, R W; Askew, E W; Sharp, M A ^[1]

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1. Univ. of Chicago, IL (USA)

To test the application of doubly labeled water under adverse field conditions, energy expenditures of 16 special operations soldiers were measured during a 28-day field training exercise. Subjects were matched by fat-free mass and divided equally between an ad libitum ready-to-eat meal diet and a 2,000 kcal/day lightweight ration. Subjects recorded intakes daily, and body composition was measured before and after the exercise. At the beginning of the study, subjects moved to a new northerly location and, therefore, a new water supply. To compensate for this, a group of soldiers who did not receive heavy water was followed to measure isotopic base-line changes. Energy expenditure by doubly labeled water was in agreement with intake/balance (3,400 {plus minus} 260 vs. 3,230 {plus minus} 520 kcal/day). The overall coefficient of variation of energy expenditure by doubly labeled water was half that of intake/balance (7.6 vs. 16.1%). The coefficient of variation of repeat measures with doubly labeled water was 7.3%. Energy expenditure of the ready-to-eat meal group, 3,540 {plus minus} 180 kcal/day, was not significantly different from the lightweight ration group, 3,330 {plus minus} 301 kcal/day. Doubly labeled water was valid under field conditions.

• OSTI ID: 6983866
• Journal Information: Journal of Applied Physiology (1985); (USA), Journal Name: Journal of Applied Physiology (1985); (USA) Vol. 67:5; ISSN 8750-7587; ISSN JAPHE
• Country of Publication: United States
• Language: English

Related Subjects

550501* -- Metabolism-- Tracer Techniques
59 BASIC BIOLOGICAL SCIENCES
BIOLOGICAL MATERIALS
BODY COMPOSITION
BODY FLUIDS
CALORIFIC VALUE
COMBUSTION PROPERTIES
DEUTERIUM
DOUBLE LABELLING
EVEN-EVEN NUCLEI
EXERCISE
FOOD
HEAVY WATER
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
LABELLING
LIGHT NUCLEI
MATERIALS
METABOLISM
MILITARY PERSONNEL
NUCLEI
ODD-ODD NUCLEI
OXYGEN 18
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
PERSONNEL
STABLE ISOTOPES
TRACER TECHNIQUES
WATER