Maintained cerebral oxygenation during maximal self-paced exercise in elite Kenyan runners

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dc.contributor.author Santos-Concejero, Jordán
dc.contributor.author Billaut, François
dc.contributor.author Grobler, Liesl
dc.contributor.author Oliván Mallén, Jesús
dc.contributor.author Noakes, Timothy D.
dc.contributor.author Tucker, Ross
dc.date.accessioned 2019-02-13T12:33:18Z
dc.date.available 2019-02-13T12:33:18Z
dc.date.issued 2015
dc.identifier.citation Santos-Concejero, J., Billaut, F., Grobler, L., Oliván, J., Noakes, T. D., & Tucker, R. (2015). Maintained cerebral oxygenation during maximal self-paced exercise in elite Kenyan runners. Journal of Applied Physiology, 118(2), 156-162. https://doi.org/10.1152/japplphysiol.00909.2014 spa
dc.identifier.issn 8750-7587
dc.identifier.issn 1522-1601
dc.identifier.uri http://hdl.handle.net/11268/7800
dc.description.abstract The purpose of this study was to analyze the cerebral oxygenation response to maximal self-paced and incremental exercise in elite Kenyan runners from the Kalenjin tribe. On two separate occasions, 15 elite Kenyan distance runners completed a 5-km time trial (TT) and a peak treadmill speed test (PTS). Changes in cerebral oxygenation were monitored via near-infrared spectroscopy through concentration changes in oxy- and deoxyhemoglobin (Δ[O2Hb] and Δ[HHb]), tissue oxygenation index (TOI), and total hemoglobin index (nTHI). During the 5-km TT (15.2 ± 0.2 min), cerebral oxygenation increased over the first half (increased Δ[O2Hb] and Δ[HHb]) and, thereafter, Δ[O2Hb] remained constant (effect size, ES = 0.33, small effect), whereas Δ[HHb] increased until the end of the trial (P < 0.05, ES = 3.13, large effect). In contrast, during the PTS, from the speed corresponding to the second ventilatory threshold, Δ[O2Hb] decreased (P < 0.05, ES = 1.51, large effect), whereas Δ[HHb] continued to increase progressively until exhaustion (P < 0.05, ES = 1.22, large effect). Last, the TOI was higher during the PTS than during the 5-km TT (P < 0.001, ES = 3.08; very large effect), whereas nTHI values were lower (P < 0.001, ES = 2.36, large effect). This study shows that Kenyan runners from the Kalenjin tribe are able to maintain their cerebral oxygenation within a stable range during a self-paced maximal 5-km time trial, but not during an incremental maximal test. This may contribute to their long-distance running success. spa
dc.description.sponsorship Sin financiación spa
dc.language.iso eng spa
dc.title Maintained cerebral oxygenation during maximal self-paced exercise in elite Kenyan runners spa
dc.type article spa
dc.description.impact 3.004 JCR (2015) Q1, 12/82 Sport Sciences; Q2, 27/83 Physiology spa
dc.identifier.doi 10.1152/japplphysiol.00909.2014
dc.rights.accessRights openAccess spa
dc.subject.uem Fisiología del ejercicio spa
dc.subject.uem Atletas spa
dc.subject.uem Circulación sanguínea spa
dc.subject.unesco Atleta spa
dc.subject.unesco Fisiología humana spa
dc.subject.unesco Kenia spa
dc.description.filiation UEM spa
dc.relation.publisherversion https://doi.org/10.1152/japplphysiol.00909.2014 spa
dc.peerreviewed Si spa

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