| Heart rate variability and exercise in aging women. | |
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MedLine Citation:
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PMID: 21967166 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Our group has shown a positive dose-response in maximal cardiorespiratory exercise capacity (VO(2max)) and heart rate variability (HRV) to 6 months of exercise training but no improvement in VO(2max) for women ≥60 years. Here, we examine the HRV response to exercise training in postmenopausal women younger and older than 60 years. METHODS: We examined 365 sedentary, overweight, hypertensive, postmenopausal women randomly assigned to sedentary control or exercise groups exercising at 50% (4 kcal/kg/week, [KKW]), 100% (8 KKW) and 150% (12 KKW) of the National Institutes of Health (NIH) Consensus Development Panel physical activity guidelines. Primary outcomes included time and frequency domain indices of HRV. RESULTS: Overall, our analysis demonstrated a significant improvement in parasympathetic tone (rMSSD and high frequency power) for both age strata at 8 KKW and 12 KKW. For rMSSD, the age-stratified responses were: control, <60 years, 0.20 ms, 95% confidence interval (CI)-2.40, 2.81; ≥60 years, 0.07 ms, 95% CI -3.64, 3.79; 4 KKW, <60 years, 3.67 ms, 95% CI 1.55, 5.79; ≥60 years, 1.20 ms, 95% CI -1.82, 4.22; 8-KKW, <60 years, 3.61 ms, 95% CI 0.88, 6.34; ≥60 years, 5.75 ms, 95% CI 1.89, 9.61; and 12-KKW, <60 years, 5.07 ms, 95% CI 2.53, 7.60; ≥60 years, 4.28 ms, 95% CI 0.42, 8.14. CONCLUSIONS: VO(2max) and HRV are independent risk factors for cardiovascular disease (CVD) mortality. Despite no improvement in VO(2max), parasympathetic indices of HRV increased in women ≥60 years. This is clinically important, as HRV has important CVD risk and neurovisceral implications beyond cardiorespiratory function. |
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Authors:
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Conrad P Earnest; Steven N Blair; Timothy S Church |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural Date: 2011-10-03 |
Journal Detail:
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Title: Journal of women's health (2002) Volume: 21 ISSN: 1931-843X ISO Abbreviation: J Womens Health (Larchmt) Publication Date: 2012 Mar |
Date Detail:
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Created Date: 2012-03-08 Completed Date: 2012-10-01 Revised Date: 2013-04-15 |
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: 334-9 Citation Subset: IM |
Affiliation:
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Pennington Biomedical Research Center, Preventive Medicine and Exercise Biology, Louisiana State University System, Baton Rouge, Louisiana 70808, USA. conrad.earnest@pbrc.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aged Aging / physiology* Female Heart Rate / physiology* Humans |
| Grant Support | |
ID/Acronym/Agency:
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HL66262/HL/NHLBI NIH HHS |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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