Cardiac responses to exercise in child distance runners

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Deutscher übersetzter Titel:Reaktionen der Herzfunktion auf Ausdauerbelastung bei Langstreckenlaeufern im Kindesalter
Autor:Rowland, T.; Goff, D.; Popowski, B.; DeLuca, P.; Ferrone, L.
Erschienen in:International journal of sports medicine
Veröffentlicht:19 (1998), 6, S. 385-390, Lit.
Format: Literatur (SPOLIT)
Publikationstyp: Zeitschriftenartikel
Medienart: Gedruckte Ressource Elektronische Ressource (online)
Sprache:Englisch
ISSN:0172-4622, 1439-3964
DOI:10.1055/s-2007-971934
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Erfassungsnummer:PU199809304261
Quelle:BISp

Abstract des Autors

Cardiovascular responses to exercise in trained endurance child athletes have been largely unexplored. Doppler echocardiography was utilized to compare cardiac variables during progressive upright cycle exercise to exhaustion in trained male prepubertal distance runners (n=8) and untrained control boys (n=14). Athletes demonstrated a greater maximal stroke index and cardiac index. Stroke volume rose progressively with increasing workloads in the runners but remained stable beyond low intensities in the non-athletes. No significant differences in stroke volume were observed between the two groups at rest. This contrasts with the greater resting stroke volumes typically seen in adult endurance athletes compared to non-athletes. Likewise, values for maximal stroke index were less in the child runners than those typically seen in trained adults. This study demonstrated that the stroke volume response to exercise differs in boy runners compared to non-athletes. The findings also suggest quantitative differences in such responses between prepubertal and young adult athletes. Verf.-Referat