Document Detail

Echocardiographic and physiological performance characteristics of triathletes.
MedLine Citation:
PMID:  10978935     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Endurance sports require a variety of physiological adaptations.
OBJECTIVE: To examine the structural and functional heart adaptations and their hemodynamic implications in triathletes.
PATIENTS AND METHODS: A group of 52 male triathletes was compared with a control group of 22 healthy male nonathletes. All of the subjects were given a bidimensional cardiac Doppler echocardiography examination and administered maximal exercise tests with lactic acid determinations, on a bicycle ergometer and a treadmill.
RESULTS: The triathletes showed clear structural and functional heart adaptations with concentric and eccentric hypertrophy with evidence of a supernormal diastolic left ventricular function. The performance capacity of the triathlete differed significantly from that of the control subject. The maximal oxygen consumption and the maximal oxygen consumption per kilogram on the bicycle and on the treadmill were significantly higher in the triathletes. The same results and conclusions were obtained concerning aerobic capacities and power outputs on a bicycle ergometer at blood lactate concentrations of 2, 3 and 4 mmol/L. The heart rate 6 min after the start of exercise is a significant parameter for the evaluation of the physical condition of a subject. The lactic acid determinations during the recovery phase enabled important conclusions to be drawn about the physical condition of the subjects.
CONCLUSIONS: The triathletes showed evidence of important structural and functional heart adaptations with hemodynamic implications. The maximal performing capacities, on the bicycle as well as on the treadmill, were distinctly higher in the triathlete group. Furthermore, the aerobic and anaerobic capacities were significantly different between the groups. In this context, the heart rate 6 min after the start of exercise and the blood lactate concentrations 20 min after the maximal exercise test were significant parameters. It was not always the best triathletes who had the most significant structural cardiac adaptations. Thus, the 'athletic heart' syndrome as a physiological entity is questioned.
C Claessen; P Claessens; M Claessens; J Claessens
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  The Canadian journal of cardiology     Volume:  16     ISSN:  0828-282X     ISO Abbreviation:  Can J Cardiol     Publication Date:  2000 Aug 
Date Detail:
Created Date:  2000-09-28     Completed Date:  2000-09-28     Revised Date:  2014-07-28    
Medline Journal Info:
Nlm Unique ID:  8510280     Medline TA:  Can J Cardiol     Country:  CANADA    
Other Details:
Languages:  eng     Pagination:  993-1002     Citation Subset:  IM    
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MeSH Terms
Adaptation, Physiological
Analysis of Variance
Bicycling / physiology*,  statistics & numerical data
Echocardiography, Doppler* / instrumentation,  methods,  statistics & numerical data
Exercise Test
Heart / physiology
Hemodynamics / physiology
Physical Endurance / physiology
Running / physiology*,  statistics & numerical data
Swimming / physiology*,  statistics & numerical data

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

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