Physical activity in free-living, overweight white and black women: divergent responses by race to diet-induced weight loss.

Details

Serval ID
serval:BIB_BA4793BCD3F8
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Physical activity in free-living, overweight white and black women: divergent responses by race to diet-induced weight loss.
Journal
American Journal of Clinical Nutrition
Author(s)
Weinsier R.L., Hunter G.R., Schutz Y., Zuckerman P.A., Darnell B.E.
ISSN
0002-9165 (Print)
ISSN-L
0002-9165
Publication state
Published
Issued date
10/2002
Volume
76
Number
4
Pages
736-742
Language
english
Notes
Publication types: Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, P.H.S.
Publication Status: ppublish
Abstract
BACKGROUND: Black women are at greater risk of obesity than are white women, perhaps because of their lower levels of physical activity.
OBJECTIVE: We compared free-living activity energy expenditure (AEE) in sedentary white and black women (in overweight and normal-weight states) and in never-overweight control subjects.
DESIGN: Subjects included 46 women (23 white, 23 black) studied while overweight and after reaching a normal weight and 38 female control subjects (23 white, 15 black). Diet, without exercise training, resulted in a mean weight loss of 13 kg and a body mass index (in kg/m(2)) < 25. Body composition, sleeping energy expenditure, free-living total energy expenditure, and the energy cost of activity and aerobic capacity were assessed before and after weight loss under 4-wk, diet-controlled, weight-stable conditions and in the control subjects. AEE was defined as above-sleep energy expenditure.
RESULTS: No significant racial differences in body composition, before or after weight loss, were found. After weight loss, AEE and aerobic capacity increased in the white women and decreased in the black women (P < 0.05 and P < 0.02, respectively). After weight loss, but not before, the white women had a significantly higher mean AEE than did the black women (2448 +/- 979 and 1728 +/- 1373 kJ/d, respectively; P < 0.05), approximating AEEs in the white (2314 +/- 1105) and black (2310 +/- 1251) control subjects.
CONCLUSIONS: Relative to the responses of the white women to diet-induced weight loss, the black women became less fit and less physically active. Induction of a normal body weight in overweight black women appeared to produce a more obesity-prone state, favoring weight relapse.
Keywords
Adult, African Continental Ancestry Group, Body Composition, Body Mass Index, Diet, Reducing, Energy Metabolism, European Continental Ancestry Group, Exercise, Female, Humans, Life Style, Middle Aged, Obesity/diet therapy, Recurrence, Sleep/physiology, Weight Loss
Pubmed
Web of science
Create date
21/01/2008 13:08
Last modification date
20/08/2019 15:28
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