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

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dc.contributor.authorDavid C. Andrade
dc.contributor.authorAlexis Arce Álvarez
dc.contributor.authorCamila Salazar Ardiles
dc.contributor.authorCamilo Toledo
dc.contributor.authorJuan Guerrero Henriquez
dc.contributor.authorCristian Alvarez
dc.contributor.authorManuel Vasquez Muñoz
dc.contributor.authorMikel Izquierdo
dc.contributor.authorGregoire P. Millet
dc.date.accessioned2026-01-23T15:16:15Z
dc.date.available2026-01-23T15:16:15Z
dc.date.issued2024
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.
dc.description.sponsorshipANID, Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT) 11220870 y ACT210083 Minera Escondida Ltda Grant MEL2203
dc.identifier.doi10.14814/phy2.15890
dc.identifier.issn2051817X
dc.identifier.urihttps://repositorioabierto.uantof.cl/handle/uantof/627
dc.language.isoen
dc.rightsAttribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.sourcePhysiological Reports
dc.titleHypoxic peripheral chemoreflex stimulation- dependent cardiorespiratory coupling is decreased in swimmer athletes
dc.typeArticle
oaire.citation.volume12
organization.identifier.rorUniversidad de Antofagasta
uantof.identificator.centerCentro de Investigación en Fisiología y Medicina de Altura
uantof.identificator.departmentDepartamento Biomédico
uantof.identificator.facultyFacultad de Ciencias de la Salud
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Departamento Biomédico
Centro de Fisiología y Medicina de Altura
Departamento ciencias de la rehabilitación y el movimiento humano