Document Detail


Age-related changes of cardiac control function in man. With special reference to heart rate control at rest and during exercise.
MedLine Citation:
PMID:  7264239     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Heart rate control function at rest and during exercise in regard to age were studied in 39 healthy male volunteers (age 15 to 75). The heart rate control function during exercise was evaluated by using system analysis of heart rate response to two-step exercises (66 and 84 steps/min). No age-related changes were found in the resting heart rate at supine position or in oxygen consumption at upright rest and during the exercises. However, the mean value and the magnitude of variation of the heart rate at upright rest and the difference of heart rate at upright and supine rest showed significant negative correlations with age. As age advanced, the transfer function of the system during exercise exhibited characteristic changes depending on the frequency ranges. These findings suggest that activity of both sympathetic and parasympathetic nervous systems were depressed at rest, and that contributions of sympathetic and vagal nervous systems during exercise are more enhanced and more depressed, respectively, in older subjects than in younger subjects.
Authors:
I Sato; Y Hasegawa; N Takahashi; Y Hirata; K Shimomura; K Hotta
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of gerontology     Volume:  36     ISSN:  0022-1422     ISO Abbreviation:  J Gerontol     Publication Date:  1981 Sep 
Date Detail:
Created Date:  1981-10-25     Completed Date:  1981-10-25     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0374762     Medline TA:  J Gerontol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  564-72     Citation Subset:  AIM; IM    
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Aged
Aging*
Exercise Test
Heart Rate*
Humans
Male
Middle Aged
Oxygen Consumption
Physical Exertion*
Posture
Rest*

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


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