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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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