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Left ventricular systolic performance during prolonged strenuous exercise in female triathletes

BACKGROUND: The effect of prolonged strenuous exercise (PSE) on left ventricular (LV) systolic function has not been well studied in younger female triathletes. This study examined LV systolic function prior to, during and immediately following PSE (i.e., 40 km bicycle time trial followed by a 10 km...

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Autores principales: McGavock, Jonathan, Haykowsky, Mark, Warburton, Darren, Taylor, Dylan, Quinney, Arthur, Welsh, Robert
Formato: Texto
Lenguaje:English
Publicado: BioMed Central 2003
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC155674/
https://www.ncbi.nlm.nih.gov/pubmed/12713668
http://dx.doi.org/10.1186/1476-5918-2-2
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author McGavock, Jonathan
Haykowsky, Mark
Warburton, Darren
Taylor, Dylan
Quinney, Arthur
Welsh, Robert
author_facet McGavock, Jonathan
Haykowsky, Mark
Warburton, Darren
Taylor, Dylan
Quinney, Arthur
Welsh, Robert
author_sort McGavock, Jonathan
collection PubMed
description BACKGROUND: The effect of prolonged strenuous exercise (PSE) on left ventricular (LV) systolic function has not been well studied in younger female triathletes. This study examined LV systolic function prior to, during and immediately following PSE (i.e., 40 km bicycle time trial followed by a 10 km run) in 13 younger (29 ± 6 years) female triathletes. METHODS: Two-dimensional echocardiographic images were obtained prior to, at 30-minute intervals during and immediately following PSE. Heart rate, systolic blood pressure, end-diastolic and end-systolic cavity areas were measured at each time point. Echocardiographic and hemodynamic measures were also combined to obtain LV end-systolic wall stress and myocardial contractility (i.e., systolic blood pressure – end-systolic cavity area relation). RESULTS: Subjects exercised at an intensity equivalent to 90 ± 3% of maximal heart rate. Heart rate, systolic blood pressure, systolic blood pressure – end-systolic cavity area relation and fractional area change increased while end-diastolic and end-systolic cavity areas decreased during exertion. CONCLUSIONS: PSE is associated with enhanced LV systolic function secondary to an increase in myocardial contractility in younger female triathletes.
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spelling pubmed-1556742003-05-17 Left ventricular systolic performance during prolonged strenuous exercise in female triathletes McGavock, Jonathan Haykowsky, Mark Warburton, Darren Taylor, Dylan Quinney, Arthur Welsh, Robert Dyn Med Research BACKGROUND: The effect of prolonged strenuous exercise (PSE) on left ventricular (LV) systolic function has not been well studied in younger female triathletes. This study examined LV systolic function prior to, during and immediately following PSE (i.e., 40 km bicycle time trial followed by a 10 km run) in 13 younger (29 ± 6 years) female triathletes. METHODS: Two-dimensional echocardiographic images were obtained prior to, at 30-minute intervals during and immediately following PSE. Heart rate, systolic blood pressure, end-diastolic and end-systolic cavity areas were measured at each time point. Echocardiographic and hemodynamic measures were also combined to obtain LV end-systolic wall stress and myocardial contractility (i.e., systolic blood pressure – end-systolic cavity area relation). RESULTS: Subjects exercised at an intensity equivalent to 90 ± 3% of maximal heart rate. Heart rate, systolic blood pressure, systolic blood pressure – end-systolic cavity area relation and fractional area change increased while end-diastolic and end-systolic cavity areas decreased during exertion. CONCLUSIONS: PSE is associated with enhanced LV systolic function secondary to an increase in myocardial contractility in younger female triathletes. BioMed Central 2003-04-08 /pmc/articles/PMC155674/ /pubmed/12713668 http://dx.doi.org/10.1186/1476-5918-2-2 Text en Copyright © 2003 McGavock et al; licensee BioMed Central Ltd. This is an Open Access article: verbatim copying and redistribution of this article are permitted in all media for any purpose, provided this notice is preserved along with the article's original URL.
spellingShingle Research
McGavock, Jonathan
Haykowsky, Mark
Warburton, Darren
Taylor, Dylan
Quinney, Arthur
Welsh, Robert
Left ventricular systolic performance during prolonged strenuous exercise in female triathletes
title Left ventricular systolic performance during prolonged strenuous exercise in female triathletes
title_full Left ventricular systolic performance during prolonged strenuous exercise in female triathletes
title_fullStr Left ventricular systolic performance during prolonged strenuous exercise in female triathletes
title_full_unstemmed Left ventricular systolic performance during prolonged strenuous exercise in female triathletes
title_short Left ventricular systolic performance during prolonged strenuous exercise in female triathletes
title_sort left ventricular systolic performance during prolonged strenuous exercise in female triathletes
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC155674/
https://www.ncbi.nlm.nih.gov/pubmed/12713668
http://dx.doi.org/10.1186/1476-5918-2-2
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