| Effects of physical conditioning on cardiac autonomic function in healthy middle-aged women. | |
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MedLine Citation:
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PMID: 11880688 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The purpose of this study was to determine whether moderate exercise training affects heart rate variability (HRV) and spontaneous baroreflex (SBR) function in healthy middle-aged women. Thirty-two sedentary women aged 40-59 yr were divided into four groups depending on reproductive state (premenopausal, PrM or postmenopausal, PoM, and training group (exercise or sedentary control group). The electrocardiographic R-R interval and systolic blood pressure (finger plethysmograph) were measured at rest during paced breathing at 16 breaths/min in the left lateral decubitus, sitting, and free standing postures, and during upright cycling at 40% maximal heart rate reserve (MHRR). After initial testing, the exercise groups underwent a 12 week walking program. After training, both exercise groups (PrM and PoM) had a longer R-R interval in all conditions, a higher SBR slope in the sitting and standing posture and lower sympathetic modulation in the standing posture, than the control groups and pre-training levels. During exercise, vagal modulation was higher and sympathetic modulation was lower in both exercise groups compared to pre-training values. Vagal modulation is increased following moderate intensity aerobic conditioning in middle-aged women. |
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Authors:
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Paula R Myslivecek; C Ann Brown; Larry A Wolfe |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Canadian journal of applied physiology = Revue canadienne de physiologie appliquée Volume: 27 ISSN: 1066-7814 ISO Abbreviation: Can J Appl Physiol Publication Date: 2002 Feb |
Date Detail:
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Created Date: 2002-03-06 Completed Date: 2002-04-17 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9306274 Medline TA: Can J Appl Physiol Country: United States |
Other Details:
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Languages: eng Pagination: 1-18 Citation Subset: IM |
Affiliation:
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School of Physical and Health Education, School of Nursing and Department of Physiology, Queen's University, Kingston, ON, Canada, K7L 3N6. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Analysis of Variance Autonomic Nervous System / physiology* Baroreflex / physiology Blood Pressure / physiology Electrocardiography Exercise Test Female Heart Conduction System / physiology* Heart Rate / physiology Humans Middle Aged Posture Walking / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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