Depressed Systolic and Diastolic Cardiac Function after Prolonged Aerobic Exercise in Healthy Subjects

Abstract We studied 11 healthy untrained volunteers (aged 28.9±4.6 years) during 60 minutes of aerobic ergometric exercise with constant heart rates of 130 to 140 beats/minute. We found a continuous and significant decrease in systolic and diastolic pressure from 175±18/77±7 mmHg in the 5th minute t...

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Bibliographic Details
Published in:International journal of sports medicine 1992-05, Vol.13 (4), p.293-297
Main Authors: Ketelhut, R., Losem, C. J., Messerli, F. H.
Format: Article
Language:English
Subjects:
Adult
Biological and medical sciences
Blood Pressure
Diastole
Echocardiography
Exercise
Exercise Test
Fundamental and applied biological sciences. Psychology
Heart - physiology
Hemodynamics
Hemodynamics. Rheology
Humans
Myocardial Contraction
Stroke Volume
Systole
Vertebrates: cardiovascular system
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Summary:Abstract We studied 11 healthy untrained volunteers (aged 28.9±4.6 years) during 60 minutes of aerobic ergometric exercise with constant heart rates of 130 to 140 beats/minute. We found a continuous and significant decrease in systolic and diastolic pressure from 175±18/77±7 mmHg in the 5th minute to 144±14/68±6 mmHg in the 60th minute of exercise. Cardiac function and structure were assessed by M-mode echocardiography before exercise, after 5 minutes and after 60 minutes of exercise at comparable heart rates. The results demonstrated significant decreases in cardiac Output, ejection fraction, and diastolic posterior wall velocity and an increase in total peripheral resistance after 60 minutes of exercise. We conclude that the decrease in blood pressure during long-term aerobic exercise in healthy untrained subjects might be at least influenced by a decrease in left ventricular filling and contractility, possibly indicating cardiac fatigue.
ISSN:0172-4622
1439-3964
DOI:10.1055/s-2007-1021269