Document Detail


Regular endurance exercise in young men increases arterial baroreflex sensitivity through neural alteration of baroreflex arc.
MedLine Citation:
PMID:  19299568     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Endurance exercise training increases arterial baroreflex sensitivity that corresponds to alteration in vessel wall compliance of the carotid artery in elderly men. Here, we examined whether regular endurance exercise increases arterial baroreflex sensitivity through neural alteration of the baroreflex arc in young men. We assessed arterial baroreflex sensitivity in eight sedentary men (age 24 +/- 1 yr) and nine men trained in endurance exercise (age 23 +/- 1 yr) during phase IV of the Valsalva maneuver [systolic arterial blood pressure (SAP)-R-R interval relationship]. Arterial baroreflex sensitivity was further analyzed by dividing the mechanical component [SAP-end-systolic carotid lumen diameter relationship (ultrasonography)] and the neural component (end-systolic carotid lumen diameter-R-R interval relationship). Carotid arterial compliance was determined using B-mode ultrasound and arterial applanation tonometry on the common carotid artery. Arterial baroreflex sensitivity and its neural component were greater in the exercise-trained group (P < 0.05). In contrast, carotid arterial compliance and the mechanical component of arterial baroreflex sensitivity did not differ between groups. These results suggest that regular endurance exercise in young men increases arterial baroreflex sensitivity through changes in the neural component of the baroreflex arc and not through alterations in vessel wall compliance of the carotid artery.
Authors:
Hidehiko Komine; Jun Sugawara; Koichiro Hayashi; Mutsuko Yoshizawa; Takashi Yokoi
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-03-19
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  106     ISSN:  8750-7587     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  2009 May 
Date Detail:
Created Date:  2009-05-05     Completed Date:  2009-06-11     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  8502536     Medline TA:  J Appl Physiol (1985)     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1499-505     Citation Subset:  IM    
Affiliation:
Institute for Human Science and Biomedical Engineering, National Institute of Advanced Industrial Science and Technology (AIST Higashi 1-1-1, Tsukuba, Ibaraki 305-8566, Japan. h-komine@aist.go.jp
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MeSH Terms
Descriptor/Qualifier:
Baroreflex / physiology*
Blood Pressure / physiology*
Cardiac Output
Carotid Artery, Common / physiology*,  ultrasonography
Compliance / physiology
Exercise / physiology*
Heart Rate / physiology
Humans
Male
Oxygen Consumption
Physical Endurance / physiology*
Physical Exertion / physiology*
Radial Artery / physiology
Valsalva Maneuver / physiology
Vascular Resistance / physiology
Young Adult

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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