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Enhanced systolic myocardial function in elite endurance athletes during combined arm-and-leg exercise
Mittuniversitetet, Fakulteten för humanvetenskap, Institutionen för hälsovetenskap.
Royal Inst Technol KTH, Sch Technol & Hlth, Stockholm, Sweden .
Mittuniversitetet, Fakulteten för humanvetenskap, Institutionen för hälsovetenskap. (Swedish Winter Sports Research Centre)
Karolinska Inst, Dept Internal Med, S-10401 Stockholm, Sweden.
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2011 (Engelska)Ingår i: European Journal of Applied Physiology, ISSN 1439-6319, E-ISSN 1439-6327, Vol. 111, nr 6, s. 905-913Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The aim here was to employ color tissue velocity imaging (TVI), to test the hypothesis that highly trained endurance athletes exhibit enhanced systolic function of the left ventricular (LV) myocardium both at rest and during combined arm-and-leg exercise in comparison with untrained subjects. For each of the ten elite male (EG) and ten matched control participants (CG), LV dimensions and systolic function were assessed at rest using echocardiography. Subsequently, these subjects exercised continuously on a combined arm-and-leg cycle ergometer for 3 min each at 50, 60, 70, 80, 90 and 100% of VO2max. Oxygen uptake, heart rate, systolic blood pressure (SBP) and peak contraction systolic velocities of the LV myocardium (PSV) were recorded in the end of each level. At rest, the trained and untrained groups differed with respect to LV dimensions, but not systolic function. At 60–100% VO2max, the EG group demonstrated both higher PSV and SBP. The observation that the EG athletes had higher PSV than CG during exercise at 60–100% VO2max, but not at rest or at 50% of VO2max, suggested an enhanced systolic capacity. This improvement is likely to be due to an enhanced inotropic contractility, which only becomes apparent during exercise.

Ort, förlag, år, upplaga, sidor
2011. Vol. 111, nr 6, s. 905-913
Nyckelord [en]
elite, exercise, heart, performance, systolic function
Nationell ämneskategori
Idrottsvetenskap Fysiologi
Identifikatorer
URN: urn:nbn:se:miun:diva-12289DOI: 10.1007/s00421-010-1712-3ISI: 000290539100002PubMedID: 21069378Scopus ID: 2-s2.0-79958144438OAI: oai:DiVA.org:miun-12289DiVA, id: diva2:372388
Projekt
Swedish Winter Sports Research CentreIntegrative Human PhysiologyTillgänglig från: 2010-11-25 Skapad: 2010-11-25 Senast uppdaterad: 2018-01-12Bibliografiskt granskad

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Carlsson, LarsLaaksonen, MarkoHolmberg, Hans-Christer

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European Journal of Applied Physiology
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