Document Detail

Effect of training on left ventricular structure and function. An echocardiographic study.
MedLine Citation:
PMID:  6651996     Owner:  NLM     Status:  MEDLINE    
To study the cardiac effects of running, 15 healthy non-athletic male volunteers underwent a moderate training schedule for six weeks; thereafter five continued to run at a similar intensity for a further six weeks and 10 stopped. Left ventricular wall thickness and dimension, relaxation, and diastolic function were studied by digitised echocardiography at entry and at two, four, and six weeks, and again at 12 weeks. Significant increases in running ability and maximum oxygen consumption were observed. Maximum oxygen consumption was unchanged in those who continued to run but a reduction was noted in those who stopped. No significant changes in left ventricular dimensions were observed, but the thickness of the posterior wall and the septum increased during six weeks' running. Left ventricular mass (cube volume formula) increased significantly during the first six weeks. Comparison of those who continued to train and those who stopped showed that the former had no change in mass, whereas in the latter mass returned towards pre-exercise values. Systolic function (fractional shortening) was unchanged throughout the study. In addition, no abnormalities of relaxation or diastolic function were detected. Exercise induced left ventricular hypertrophy may develop rapidly during training and the increased myocardial mass resulting from six or 12 weeks' running is not associated with impaired relaxation and diastolic function as found in pathological forms of hypertrophy.
L M Shapiro; R G Smith
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  British heart journal     Volume:  50     ISSN:  0007-0769     ISO Abbreviation:  Br Heart J     Publication Date:  1983 Dec 
Date Detail:
Created Date:  1984-02-14     Completed Date:  1984-02-14     Revised Date:  2009-11-18    
Medline Journal Info:
Nlm Unique ID:  0370634     Medline TA:  Br Heart J     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  534-9     Citation Subset:  AIM; IM    
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MeSH Terms
Body Weight
Heart / anatomy & histology,  physiology*
Heart Rate
Heart Ventricles / anatomy & histology
Oxygen Consumption
Physical Education and Training*
Physical Exertion
Ventricular Function

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

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