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Obesity (Silver Spring). 2014 Feb;22(2):363-70. doi: 10.1002/oby.20525. Epub 2013 Aug 23.

Effect of physical activity on weight loss, energy expenditure, and energy intake during diet induced weight loss.

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1
Division of Endocrinology and Metabolism, Department of Medicine, School of Medicine, Pittsburgh, Pennsylvania.

Abstract

OBJECTIVE:

Objective measurements of physical activity (PA), energy expenditure (EE) and energy intake can provide valuable information regarding appropriate strategies for successful sustained weight loss.

DESIGN AND METHODS:

The total EE was examined by doubly labeled water, resting metabolic rate by indirect calorimetry, PA with activity monitors, and energy intake by the intake/balance technique in 116 severely obese undergoing intervention with diet alone (DO) or diet plus PA (D-PA).

RESULTS:

Weight loss of 9.6 ± 6.8 kg resulted in decreased EE which was not minimized in the D-PA group. Comparing the highest and lowest quartiles of increase in PA revealed a lower decrease in TDEE (-122 ± 319 vs. -376 ± 305 kcal day⁻¹), elimination of the drop in AEE (83 ± 279 vs. -211 ± 284 kcal day⁻¹) and greater weight loss (13.0 ± 7.0 vs. 8.1 ± 6.3 kg). Increased PA was associated with greater adherence to energy restriction and maintenance of greater weight loss during months 7-12.

CONCLUSION:

Noncompliance to prescribed PA in the DO and D-PA groups partially masked the effects of PA to increase weight loss and to minimize the reduced EE. Increased PA was also associated with improved adherence to prescribed caloric restriction. A strong recommendation needs to be made to improve interventions that promote PA within the context of behavioral weight loss interventions.

PMID:
23804562
PMCID:
PMC4896218
DOI:
10.1002/oby.20525
[Indexed for MEDLINE]
Free PMC Article
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