Document Detail

Intakes of most nutrients remain at acceptable levels during a weight management program using the food exchange system.
MedLine Citation:
PMID:  11374349     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: The purpose of this study was to determine if the food exchange system allows subjects' nutrient intake to remain at recommended levels during a weight-loss program. DESIGN: Subjects in an intervention were prescribed an energy-restriction diet and exercise program lasting 32 weeks, and nutrient intake was measured prestudy and after 12, 16, and 32 weeks. SUBJECTS/SETTING: Healthy but overweight and obese premenopausal women (n = 219) were recruited at 6 university sites into community-based weight loss programs. One hundred fifteen women completed all aspects of the study. INTERVENTION: Energy intake was set at 0.8 x resting metabolic rate (RMR) for weeks 1 through 12, 1.0 x RMR for weeks 13 through 20, and 1.2 x RMR for weeks 21 through 32. Energy intake was based on food exchange tables, with the number of food exchanges adjusted to encourage a distribution of 55% carbohydrate, 30% fat, and 15% protein. Subjects increased their daily walking distance to 3.2 km above prestudy levels. MAIN OUTCOME MEASURES: Nutrient intake was measured from four 3-day food records. STATISTICAL ANALYSES PERFORMED: Repeated measures analysis of variance, with specific time point changes assessed from paired t tests adjusted for multiple comparisons. RESULTS: Body mass decreased by a mean +/- SD of 6.7 +/- 3.2 kg at week 12 and 7.8 +/- 6.2 kg by week 32. Walking distance increased by an average of 17.2 +/- 10.0 km/week during the first 12 weeks, and 12.4 +/- 12.4 km/week during the last 20 weeks. Despite a 23% to 36% reduction in energy intake during the study, intake of most nutrients was maintained. Intake of vitamin E, calcium, iron, and zinc decreased significantly from prestudy levels during the first 16 weeks of the intervention, but not at week 32. APPLICATIONS/CONCLUSIONS: Intake of most nutrients can remain at recommended levels when overweight and obese women follow the American Diabetes Association/American Dietetic Association food exchange system during a community-based weight-loss program.
L M Benezra; D C Nieman; C M Nieman; C Melby; K Cureton; D Schmidt; E T Howley; C Costello; J O Hill; J R Mault; H Alexander; D J Stewart; K Osterberg
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the American Dietetic Association     Volume:  101     ISSN:  0002-8223     ISO Abbreviation:  J Am Diet Assoc     Publication Date:  2001 May 
Date Detail:
Created Date:  2001-05-25     Completed Date:  2001-06-14     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7503061     Medline TA:  J Am Diet Assoc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  554-61     Citation Subset:  AIM; IM    
Department of Health and Exercise Science, Appalachian State University, Boone, NC 28608, USA.
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MeSH Terms
Analysis of Variance
Body Composition
Body Mass Index
Body Weight
Diet Records
Diet, Reducing*
Middle Aged
Minerals / administration & dosage*
Nutrition Assessment
Nutrition Policy
Nutritional Requirements
Obesity / therapy*
Time Factors
United States
Vitamins / administration & dosage*
Weight Loss
Reg. No./Substance:
0/Minerals; 0/Vitamins

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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