Document Detail


Effect of exercise training on biologic vascular age in healthy seniors.
MedLine Citation:
PMID:  22268113     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Arteriosclerosis with aging leads to central arterial stiffening in humans, which could be a prime cause for increased cardiac afterload in the elderly. The purpose of the present study was to assess the effects of 1 yr of progressive exercise training on central aortic compliance and left ventricular afterload in sedentary healthy elderly volunteers. Ten healthy sedentary seniors and 11 Masters athletes (>65 yr) were recruited. The sedentary seniors underwent 1 yr of progressive exercise training so that at the end of the year, they were exercising ∼200 min/wk. Central aortic compliance was assessed by the Modelflow aortic age, which reflects the intrinsic structural components of aortic compliance. Cardiac afterload was assessed by effective arterial elastance (Ea) with its contributors of peripheral vascular resistance (PVR) and systemic arterial compliance (SAC). After exercise training, Ea, PVR, and SAC were improved in sedentary seniors and became comparable with those of Masters athletes although the Modelflow aortic age was not changed. Moreover, after exercise training, when stroke volume was restored with lower body negative pressure back to pretraining levels, the exercise training-induced improvements in Ea, PVR, and SAC were eliminated. Aortic stiffening with aging was not improved even after 1 yr of progressive endurance exercise training in the previously sedentary elderly, while left ventricular afterload was reduced. This reduced afterload after exercise training appeared to be attributable to cardiovascular functional modulation to an increase in stroke volume rather than to intrinsic structural changes in the arterial wall.
Authors:
Shigeki Shibata; Benjamin D Levine
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2012-01-20
Journal Detail:
Title:  American journal of physiology. Heart and circulatory physiology     Volume:  302     ISSN:  1522-1539     ISO Abbreviation:  Am. J. Physiol. Heart Circ. Physiol.     Publication Date:  2012 Mar 
Date Detail:
Created Date:  2012-03-16     Completed Date:  2012-05-07     Revised Date:  2014-05-14    
Medline Journal Info:
Nlm Unique ID:  100901228     Medline TA:  Am J Physiol Heart Circ Physiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  H1340-6     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Age Factors
Aged
Aging* / pathology
Analysis of Variance
Aorta / pathology,  physiopathology*
Blood Pressure
Compliance
Exercise*
Female
Hemodynamics*
Humans
Lower Body Negative Pressure
Male
Sedentary Lifestyle*
Stroke Volume
Texas
Time Factors
Vascular Resistance
Ventricular Function, Left
Grant Support
ID/Acronym/Agency:
AG-17479-05/AG/NIA NIH HHS; R01 AG017479/AG/NIA NIH HHS
Comments/Corrections

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