Hypoxic peripheral chemoreflex stimulation-dependent cardiorespiratory coupling is decreased in swimmer athletes

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dc.contributor.authorAndrade, David C.
dc.contributor.authorArce-Álvarez, Alexis
dc.contributor.authorSalazar-Ardiles, Camila
dc.contributor.authorToledo, Camilo
dc.contributor.authorGuerrero-Henriquez, Juan
dc.contributor.authorAlvarez, Cristian
dc.contributor.authorVasquez-Muñoz, Manuel
dc.contributor.authorIzquierdo, Mikel
dc.contributor.authorMillet, Gregoire P.
dc.date.accessioned2024-10-09T20:11:31Z
dc.date.available2024-10-09T20:11:31Z
dc.date.issued2024-01
dc.descriptionIndexación: Scopus
dc.description.abstractSwimmer athletes showed a decreased ventilatory response and reduced sympathetic activation during peripheral hypoxic chemoreflex stimulation. Based on these observations, we hypothesized that swimmers develop a diminished cardiorespiratory coupling due to their decreased hypoxic peripheral response. To resolve this hypothesis, we conducted a study using coherence time-varying analysis to assess the cardiorespiratory coupling in swimmer athletes. We recruited 12 trained swimmers and 12 control subjects for our research. We employed wavelet time-varying spectral coherence analysis to examine the relationship between the respiratory frequency (Rf) and the heart rate (HR) time series during normoxia and acute chemoreflex activation induced by five consecutive inhalations of 100% N2. Comparing swimmers to control subjects, we observed a significant reduction in the hypoxic ventilatory responses to N2 in swimmers (0.012 ± 0.001 vs. 0.015 ± 0.001 ΔVE/ΔVO2, and 0.365 ± 0.266 vs. 1.430 ± 0.961 ΔVE/ΔVCO2/ΔSpO2, both p < 0.001, swimmers vs. control, respectively). Furthermore, the coherence at the LF cutoff during hypoxia was significantly lower in swimmers compared to control subjects (20.118 ± 3.502 vs. 24.935 ± 3.832 area under curve [AUC], p < 0.012, respectively). Our findings strongly indicate that due to their diminished chemoreflex control, swimmers exhibited a substantial decrease in cardiorespiratory coupling during hypoxic stimulation. © 2024 The Authors. Physiological Reports published by Wiley Periodicals LLC on behalf of The Physiological Society and the American Physiological Society.
dc.identifier.citationPhysiological Reports Volume 12, Issue1 January 2024
dc.identifier.doi10.14814/phy2.15890
dc.identifier.issn2051-817X
dc.identifier.urihttps://repositorio.unab.cl/handle/ria/61192
dc.language.isoen
dc.publisherAmerican Physiological Society
dc.rights.licenseAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectchemoreflex
dc.subjectcoherence
dc.subjecthypoxia
dc.subjectswimmers
dc.titleHypoxic peripheral chemoreflex stimulation-dependent cardiorespiratory coupling is decreased in swimmer athletes
dc.typeArtículo
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