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| Research article summary (published 27 Feb 2002): |
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Comparison of energy expenditure estimates from doubly labeled water, a physical activity questionnaire, and physical activity records.
Full Abstract
BACKGROUND:
Various methods are used by epidemiologists to estimate the energy cost of physical activity; these include physical activity records and recalls. However, there is limited validation of these methods against the doubly labeled water technique for determining energy expenditure (EE).
OBJECTIVE:
We compared EE as estimated by indirect methods (physical activity records and recall questionnaires) used in epidemiologic studies with EE obtained from doubly labeled water (EE(DLW)) in free-living men.
DESIGN:
We determined EE(DLW), energy intake at weight maintenance, and EE from 7-d physical activity records (EE(Record)) and a 7-d physical activity recall questionnaire (EE(Recall)) in 24 men aged 41 plus minus 2.0 y ( plus minus SEM) with a body mass index (in kg/m(2)) of 25.1 plus minus 0.5.
RESULTS:
There was excellent agreement between EE(DLW) (13.27 plus minus 0.35 MJ/d) and energy intake (13.19 plus minus 0.36 MJ/d), with a difference of 0.5 plus minus 1.0% ( plus minus SE). The indirect measures of physical activity and EE were 14.17 plus minus 0.37 MJ/d for EE(Record) (difference from EE(DLW):
7.9 plus minus 3.2%) and 17.40 plus minus 1.45 MJ/d for EE(Recall) (difference from EE(DLW):
30.6 plus minus 9.9%).
CONCLUSIONS:
Seven-day physical activity records provide an acceptable estimate of EE in free-living adults compared with EE(DLW), but 7-d physical activity recalls have limited application to estimate daily EE. For optimal validity, the 7-d physical activity records require good subject compliance and the provision of careful instructions for their use.
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Author information
Author/s: Conway, Joan M (JM); Seale, James L (JL); Jacobs, David R (DR); Irwin, Melinda L (ML); Ainsworth, Barbara E (BE);
Affiliation: US Department of Agriculture, Agricultural Research Service, Beltsville Human Nutrition Research Center, Diet and Human Performance Laboratory, Beltsville, MD 20705, USA. conway(-atsign-)bhnrc.arsusda.gov
Journal and publication information
Publication Type: Comparative Study; Journal Article
Journal: The American journal of clinical nutrition (Am J Clin Nutr), published in United States. (Language: eng)
Reference: 2002-Mar; vol 75 (issue 3) : pp 519-25
Dates: Created 2002/02/26; Completed 2002/03/18; Revised 2006/11/15;
PMID: 11864858, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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