| Cardiac responses to swim bench exercise in age-group swimmers and non-athletic children. | |
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MedLine Citation:
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PMID: 18296115 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The effect of body posture (e.g., gravity) on circulatory responses to exercise remains to be clarified. This study was designed to examine cardiovascular dynamics during prone swim bench exercise in age-group swimmers and to compare these responses to those of matched non-athletic children. Fourteen trained swimmers (mean age 11.3+/-0.5 years) performed progressive exercise to exhaustion during simulated butterfly stroke exercise on a swim bench. Stroke volume was assessed by the Doppler ultrasound technique. Standard echocardiographic measures of left ventricular dimensions and function were recorded at rest prior to exercise. Swimmers were compared to a group of 11 non-athletic children matched for age, gender, and anthropometric measures. Compared to the nonathletes, the swimmers demonstrated larger resting left ventricular diastolic dimension and mass (adjusted for body size) but no differences in systolic or diastolic function. Mean peak VO(2) was 23.2+/-4.1mlkg(-1)min(-1) and 17.8+/-4.4mlkg(-1)min(-1) in the swimmers and nonathletes, respectively (p<0.05). No significant changes were seen in stroke index with increasing work in either group, with values consistently greater in the swimmers (peak 37+/-6mlm(-2) versus 31+/-5mlm(-2) in the untrained subjects). Failure of stroke volume to rise during a progressive simulated swim test is consistent with a model of peripheral facilitation of circulatory responses to exercise. |
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Authors:
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Thomas Rowland; Valérie Bougault; Guillaume Walther; Stéphane Nottin; Agnes Vinett; Philippe Obert |
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Publication Detail:
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Type: Journal Article Date: 2008-02-25 |
Journal Detail:
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Title: Journal of science and medicine in sport / Sports Medicine Australia Volume: 12 ISSN: 1440-2440 ISO Abbreviation: J Sci Med Sport Publication Date: 2009 Mar |
Date Detail:
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Created Date: 2009-03-16 Completed Date: 2009-05-15 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9812598 Medline TA: J Sci Med Sport Country: Australia |
Other Details:
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Languages: eng Pagination: 266-72 Citation Subset: IM |
Affiliation:
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Department of Pediatrics, Baystate Medical Center, Springfield, MA, USA. Thomas.rowland@bhs.org |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Case-Control Studies Child Exercise / physiology Exercise Tolerance / physiology* Female Heart Rate Humans Male Stroke Volume / physiology* Swimming / physiology* |
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