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Discrepancy between Self-Reported and Actual Caloric Intake and Exercise in Obese Subjects

Lichtman, Steven W., Pisarska, Krystyna, Berman, Ellen Raynes, Pestone, Michele, Dowling, Hillary, Offenbacher, Esther, Weisel, Hope, Heshka, Stanley, Matthews, Dwight E., Heymsfield, Steven B.·1992·New England Journal of Medicine
DOI 10.1056/nejm199212313272701
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Abstract

Background and methods Some obese subjects repeatedly fail to lose weight even though they report restricting their caloric intake to less than 1200 kcal per day. We studied two explanations for this apparent resistance to diet--low total energy expenditure and underreporting of caloric intake--in 224 consecutive obese subjects presenting for treatment. Group 1 consisted of nine women and one man with a history of diet resistance in whom we evaluated total energy expenditure and its main thermogenic components and actual energy intake for 14 days by indirect calorimetry and analysis of body composition. Group 2, subgroups of which served as controls in the various evaluations, consisted of 67 women and 13 men with no history of diet resistance. Results Total energy expenditure and resting metabolic rate in the subjects with diet resistance (group 1) were within 5 percent of the predicted values for body composition, and there was no significant difference between groups 1 and 2 in the thermic effects of food and exercise. Low energy expenditure was thus excluded as a mechanism of self-reported diet resistance. In contrast, the subjects in group 1 underreported their actual food intake by an average (+/- SD) of 47 +/- 16 percent and overreported their physical activity by 51 +/- 75 percent. Although the subjects in group 1 had no distinct psychopathologic characteristics, they perceived a genetic cause for their obesity, used thyroid medication at a high frequency, and describ…

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Research works printed but not linked: 33

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Metadata

Authors
Lichtman, S. W., Pisarska, K., Berman, E. R., Pestone, M., Dowling, H., Offenbacher, E., Weisel, H., Heshka, S., Matthews, D. E., & Heymsfield, S. B.
Venue
New England Journal of Medicine
Publisher
Massachusetts Medical Society
Published
1992-12-31
Volume
327
Issue
27
Pages
1893-1898
ISSN
  • 0028-4793
  • 1533-4406
DOI
10.1056/nejm199212313272701
Cited by
964
References
0
Language
en

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