Document Detail


Exercise training and habitual physical activity: a randomized controlled trial.
MedLine Citation:
PMID:  23159258     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Exercise training reduces adiposity and risk of cardiovascular disease. However, the combined effects of habitual free-living physical activity and aerobic training on waist circumference, weight, fitness, and blood pressure in postmenopausal women are unknown.
PURPOSE: To evaluate the effects of habitual physical activity levels during aerobic training on weight, waist circumference, fitness, and blood pressure.
DESIGN: Secondary analysis of an RCT. Original data collected April 2001 to June 2005 and analyzed in 2012.
SETTING/PARTICIPANTS: Postmenopausal women in a supervised exercise trial.
INTERVENTION: Women (n=325) were randomized to 4, 8, or 12 kcal/kg per week of aerobic training or a control group for 6 months. All outcome measures were collected at baseline and follow-up. Changes in dependent variables within each training group were evaluated across tertiles of pedometer-determined habitual physical activity outside exercise training sessions.
MAIN OUTCOME MEASURES: Changes in waist circumference and weight.
RESULTS: Reductions in waist circumference were significantly greater with higher steps/day accumulated outside exercise training compared to lower levels in the 4 (high: -4.8 cm vs low: -1.4 cm, p=0.03); 8 (high: -4.2 cm vs low: -0.4 cm, p=0.03), and 12 kcal/kg per week groups (high: -4.1 cm vs low: -0.7 cm, p=0.05). For all groups, p-trend≤0.03. A trend was observed for greater weight reduction with higher steps/day in the 4 kcal/kg per week group (p-trend=0.04) but not for the other exercise doses. No effects were observed for blood pressure or fitness measures (all p>0.05).
CONCLUSIONS: In postmenopausal women, higher habitual physical activity while participating in aerobic training was associated with greater reductions in central adiposity, and was supportive of weight loss compared to lower levels.
Authors:
Damon L Swift; Neil M Johannsen; Catrine Tudor-Locke; Conrad P Earnest; William D Johnson; Steven N Blair; Martin Sénéchal; Timothy S Church
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Publication Detail:
Type:  Comparative Study; Journal Article; Randomized Controlled Trial; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  American journal of preventive medicine     Volume:  43     ISSN:  1873-2607     ISO Abbreviation:  Am J Prev Med     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-11-19     Completed Date:  2013-05-01     Revised Date:  2013-12-04    
Medline Journal Info:
Nlm Unique ID:  8704773     Medline TA:  Am J Prev Med     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  629-35     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 American Journal of Preventive Medicine. Published by Elsevier Inc. All rights reserved.
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MeSH Terms
Descriptor/Qualifier:
Blood Pressure / physiology
Exercise / physiology*
Female
Follow-Up Studies
Humans
Middle Aged
Motor Activity / physiology
Physical Fitness / physiology
Postmenopause*
Waist Circumference / physiology*
Weight Loss / physiology*
Grant Support
ID/Acronym/Agency:
HL66262/HL/NHLBI NIH HHS; R01 HL066262/HL/NHLBI NIH HHS
Comments/Corrections

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