Document Detail


Beneficial effects of exercise: shifting the focus from body weight to other markers of health.
MedLine Citation:
PMID:  19793728     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
BACKGROUND: Exercise is widely promoted as a method of weight management, while the other health benefits are often ignored. The purpose of this study was to examine whether exercise-induced improvements in health are influenced by changes in body weight.
METHODS: Fifty-eight sedentary overweight/obese men and women (BMI 31.8 (SD 4.5) kg/m(2)) participated in a 12-week supervised aerobic exercise intervention (70% heart rate max, five times a week, 500 kcal per session). Body composition, anthropometric parameters, aerobic capacity, blood pressure and acute psychological response to exercise were measured at weeks 0 and 12.
RESULTS: The mean reduction in body weight was -3.3 (3.63) kg (p<0.01). However, 26 of the 58 participants failed to attain the predicted weight loss estimated from individuals' exercise-induced energy expenditure. Their mean weight loss was only -0.9 (1.8) kg (p<0.01). Despite attaining a lower-than-predicted weight reduction, these individuals experienced significant increases in aerobic capacity (6.3 (6.0) ml/kg/min; p<0.01), and a decreased systolic (-6.00 (11.5) mm Hg; p<0.05) and diastolic blood pressure (-3.9 (5.8) mm Hg; p<0.01), waist circumference (-3.7 (2.7) cm; p<0.01) and resting heart rate (-4.8 (8.9) bpm, p<0.001). In addition, these individuals experienced an acute exercise-induced increase in positive mood.
CONCLUSIONS: These data demonstrate that significant and meaningful health benefits can be achieved even in the presence of lower-than-expected exercise-induced weight loss. A less successful reduction in body weight does not undermine the beneficial effects of aerobic exercise. From a public health perspective, exercise should be encouraged and the emphasis on weight loss reduced.
Authors:
N A King; M Hopkins; P Caudwell; R J Stubbs; J E Blundell
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-09-29
Journal Detail:
Title:  British journal of sports medicine     Volume:  43     ISSN:  1473-0480     ISO Abbreviation:  Br J Sports Med     Publication Date:  2009 Dec 
Date Detail:
Created Date:  2009-11-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0432520     Medline TA:  Br J Sports Med     Country:  England    
Other Details:
Languages:  eng     Pagination:  924-7     Citation Subset:  IM    
Affiliation:
Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Australia. n.king@qut.edu.au
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MeSH Terms
Descriptor/Qualifier:
Grant Support
ID/Acronym/Agency:
BBS/B/05079//Biotechnology and Biological Sciences Research Council

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