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Central hemodynamics in ultra-endurance athletes

Citation

Knez, WL and Sharman, JE and Jenkins, DG and Coombes, JS, Central hemodynamics in ultra-endurance athletes, Journal of Science and Medicine in Sport, 11, (4) pp. 390-395. ISSN 1440-2440 (2008) [Refereed Article]

DOI: doi:10.1016/j.jsams.2006.11.005

Abstract

Central hemodynamics such as ascending aortic blood pressure (BP), wave reflection and myocardial perfusion are clinically important in the context of cardiovascular health. Ultra-endurance athletes may be at greater risk of cardiovascular abnormalities due to chronically increased physiological stress placed on the cardiovascular system. This study was a cross-sectional investigation that compared central hemodynamics in ultra-endurance athletes and matched controls. Forty-four athletes (36 males; aged mean S.D., 34 8 years) undergoing ultra-endurance training (16.3 3.7 h/week) were compared to 44 matched recreationally active (1.2 0.9 h/week) controls (36 males; aged 34 8 years). Brachial BP was measured using an oscillometric device while central hemodynamics including ascending aortic BP, wave reflection (augmentation index, AIx), ejection duration, sub-endocardial perfusion (SEVR) and timing of the reflected wave (TR) were determined by applanation tonometry and pulse wave analysis. There were no significant (P > 0.05) differences between groups in AIx (athletes and controls; 6 12% versus 6 13%, respectively), TR (athletes and controls; 165 22 ms versus 165 19 ms, respectively), brachial (athletes and controls; 51 9 mmHg versus 48 12 mmHg, respectively) or central pulse pressure (33 5 mmHg versus 31 7 mmHg). However, athletes had significantly increased SEVR (226 42% versus 198 46%; P < 0.001) despite having a longer ejection duration (348 19 ms versus 339 18 ms; P < 0.05). Furthermore, the amount of exercise training volume was significantly related to central (r = -0.46; P = 0.002), but not brachial pulse pressure (r = -0.28; P > 0.05). Ultra-endurance athletes had increased sub-endocardial perfusion capacity and the quantity of exercise training was associated with central rather than peripheral hemodynamics.

Item Details

Item Type:Refereed Article
Research Division:Medical and Health Sciences
Research Group:Cardiorespiratory Medicine and Haematology
Research Field:Cardiology (incl. Cardiovascular Diseases)
Objective Division:Health
Objective Group:Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:Cardiovascular System and Diseases
Author:Sharman, JE (Professor James Sharman)
ID Code:61276
Year Published:2008
Web of Science® Times Cited:12
Deposited By:Menzies Institute for Medical Research
Deposited On:2010-03-02
Last Modified:2010-05-04
Downloads:0

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