| Dose-response relationship between moderate-intensity exercise duration and coronary heart disease risk factors in postmenopausal women. | |
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MedLine Citation:
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PMID: 19132882 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: This study was designed to investigate whether, in a dose-response manner, there would be greater health benefits in a group of postmenopausal women completing 45 minute- vs. 30 minutes of moderate intensity (50% maximal oxygen uptake reserve, VO2R) exercise 5 days . wk(-1). METHODS: Apparently healthy but sedentary postmenopausal women (n = 33) were randomized to a nonexercise control group, a 30-minute exercise duration group, or a 45-minute exercise duration group. Exercise training was performed 5 days . wk(-1) for 12 weeks at 50% VO2R. Participants were instructed to not change their usual diet throughout the study. RESULTS: Twenty-six women completed the study. After 12 weeks, VO2max increased significantly (p < 0.05) in both 30-minute (0.20 +/- 0.21 L . min(-1)) and 45-minute (0.41 +/- 0.10 L . min(-1)) groups. Repeated measures ANOVA identified a significant interaction between exercise duration and VO2max values (F = 4.72, p < 0.05), indicating that VO2max responded differently to 30-minute and 45-minute exercise durations. Trend analysis showed that body mass, body composition, waist circumference, and high-density lipoprotein cholesterol (HDL-C) changed favorably (p < 0.05) across control, 30-minute, and 45-minute groups. CONCLUSIONS: Although most health organizations agree that 150 min . wk(-1) of physical activity will reduce the risk of all-cause and cardiovascular mortality, few randomized, controlled studies have examined whether completing more physical activity than the recommended amount will yield additional benefits. Findings from the present study suggest that there is a dose-response relationship between exercise duration and numerous health outcomes in postmenopausal women, including cardiorespiratory fitness, body mass, body composition, waist circumference, and HDL-C. |
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Authors:
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Lance C Dalleck; Brittany A Allen; Bailey A Hanson; Erica C Borresen; Mary E Erickson; Sondra L De Lap |
Publication Detail:
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Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of women's health (2002) Volume: 18 ISSN: 1931-843X ISO Abbreviation: J Womens Health (Larchmt) Publication Date: 2009 Jan-Feb |
Date Detail:
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Created Date: 2009-01-09 Completed Date: 2009-04-27 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101159262 Medline TA: J Womens Health (Larchmt) Country: United States |
Other Details:
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Languages: eng Pagination: 105-13 Citation Subset: IM |
Affiliation:
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University of Wisconsin-Eau Claire, Eau Claire, Wisconsin. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Aged Blood Pressure Body Composition / physiology* Body Mass Index Cholesterol / blood Coronary Disease / prevention & control* Energy Metabolism / physiology Exercise / physiology* Exercise Therapy / methods* Female Humans Middle Aged Oxygen Consumption / physiology Physical Fitness / physiology* Postmenopause / physiology* Risk Factors Time Factors Treatment Outcome Women's Health |
| Chemical | |
Reg. No./Substance:
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57-88-5/Cholesterol |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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