Comparison of self-reported with objectively assessed energy expenditure in black and white women before and after weight loss

Walsh, Marianne C.; Hunter, Gary R.; Sirikul, Bovorn; Gower, Barbara A.

doi:10.1093/ajcn/79.6.1013

Cited by 82 publications

(74 citation statements)

References 30 publications

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“…18,19 A Bland-Altman analysis 26 indicated that the heart rate monitor provided reasonable group estimates of ExEE relative to indirect calorimetry, although error was evident at the individual level, a finding that is consistent with other heart rate monitors previously investigated in our laboratory (unpublished data). The implication of this finding is that researchers using heart rate monitors for large-scale lifestyle interventions can rely on the ExEE estimates made by the heart rate monitors.…”

Section: Discussionsupporting

confidence: 76%

“…15 Self-reported exercise diaries and questionnaires have been used in the past to measure adherence; 9,16,17 however, overestimation of self-reported exercise data has been identified as a problem, particularly in overweight and obese individuals. 18,19 Support for the use of objective measures of diet and exercise is increasing; 20 a change that is required to elucidate which treatment component is not being followed and to what extent this is contributing to a lack of expected change in both weight loss 21 and health benefit.…”

Section: Introductionmentioning

confidence: 99%

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Variability in adherence to an unsupervised exercise prescription in obese women

et al. 2008

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Objective: To measure adherence to a specific exercise prescription (1500 kcal week À1 ) by objectively quantifying unsupervised exercise energy expenditure (ExEE) in obese women. Design: The 16-week lifestyle intervention consisted of weekly meetings with research staff and promotion of increased ExEE (1500 kcal week À1 ) and a decreased dietary intake (À500 kcal day À1 ). Participants: Twenty-nine obese females (body mass index ¼ 36.8 ± 5.0 kg m À2 , body fat ¼ 49.6 ± 3.7%) from a hospital-based lifestyle intervention were included in the analysis. Measurements: ExEE was estimated and monitored weekly using heart rate monitoring, and body composition was measured before and after the intervention by dual-energy X-ray absorptiometry. Results: Free-living adherence to the exercise prescription was variable and, on average, modest such that 14% achieved 1500 kcal week À1 , and the average weekly ExEE (768 kcal week À1 ) represented 51.2% of the total amount prescribed. ExEE was correlated with changes in body weight (r ¼ 0.65, Po0.001) and fat mass (r ¼ 0.65, Po0.001). Achievement of a 5% weight loss target was dependent on the achievement of an ExEE level of 1000 kcal week À1 (Po0.001). Exercise 'adherers' (41000 kcal week À1 ) lost more weight (À9.9 vs À4.1 kg), more fat mass (À6.8 vs À3.0 kg) and more waist circumference (À9.8 vs À5.6 cm) when compared to 'non-adherers' (o1000 kcal week À1 ). Discussion: Exercise is an integral component of lifestyle interventions aimed at reducing obesity and its complications. However, without accurate and objective measures of ExEE, it is difficult for relationships between exercise and health outcomes to be elucidated. The present study suggests an alternative to self-report to increase the confidence with which conclusions are drawn regarding the role of exercise within lifestyle interventions.

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Section: Discussionsupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Variability in adherence to an unsupervised exercise prescription in obese women

et al. 2008

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“…The more objective measures (pedometer, BMI, and waist measurement) were consistent with the marked dyslipidemia and higher blood pressure found in the type 2 diabetic cohort. These reporting errors are consistent with prior research (23)(24)(25). Underreporting of caloric intake may be due to inattention to, or lack of knowledge of, healthy foods and portion size (26), both of which can negatively impact achievement of carbohydratecounting proficiency.…”

supporting

confidence: 86%

Should Group Education Classes Be Separated by Type of Diabetes?

et al. 2006

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“…FEE was underestimated by 14.6% relative to DEE, but this was improved to 5.1% (P ¼ 0.071) when FEE was adjusted for EPOC and TEF. Some studies have also found factorial underestimation of daily EE (Haggarty et al, 1994;Leonard et al, 1997), but others have reported overestimation (Alfonzo-Gonzalez et al, 2004;Walsh et al, 2004), or no difference between FEE and DEE measures (Bratteby et al, 1997;Jones et al, 1997;Morio et al, 1997;Withers et al, 1998;Seale et al, 2002). Such discrepancies are very likely owing to differences in methods used to determine BMR and energy costs of activities, the number of activity categories used and the accuracy of estimates or records of time spent in activities, all of which affect the precision of factorial methods.…”

Section: Resultsmentioning

confidence: 99%

Factorial estimation of daily energy expenditure using a simplified method was improved by adjustment for excess post-exercise oxygen consumption and thermic effect of food

Warwick

2006

Eur J Clin Nutr

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This study validated a simplified factorial method for measuring energy expenditure (EE) against EE measured by doubly labelled water (DEE), and investigated whether adjustment for excess post-exercise oxygen consumption (EPOC) and thermic effect of food (TEF) as described by Institute of Medicine (2002) improved the factorial measure. Seventeen normal weight subjects (10 females, seven males) were recruited from among university staff and students. Factorial EE was measured using a 16-activitycategory method, published energy costs of activities and measured basal metabolic rate, before (FEE) and after (FEE adj ) adjustment for EPOC and TEF, and by DEE. FEE underestimated daily EE by 14.6% relative to DEE (P ¼ 0.000), but this underestimate was improved to 5.1% (P ¼ 0.071) when FEE was adjusted for EPOC and TEF. Individual differences between DEE and FEE adj ranged from À20.2 to 17.6%, with 88% of subjects showing differences of less than 712%.

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Comparison of self-reported with objectively assessed energy expenditure in black and white women before and after weight loss

Abstract: Premenopausal women overestimate PA estimates on questionnaires. Overestimation of PA in weight-reduced black women is greater than in weight-reduced white women and never-overweight black and white women.

Cited by 82 publications

References 30 publications

Variability in adherence to an unsupervised exercise prescription in obese women

Variability in adherence to an unsupervised exercise prescription in obese women

Should Group Education Classes Be Separated by Type of Diabetes?

Factorial estimation of daily energy expenditure using a simplified method was improved by adjustment for excess post-exercise oxygen consumption and thermic effect of food

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