Hypoxic Respiratory Chemoreflex Control in Young Trained Swimmers

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dc.contributor.authorArce-Alvarez, Alexis
dc.contributor.authorVeliz, Carlos
dc.contributor.authorVazquez-Munoz, Manuel
dc.contributor.authorvon Igel, Magdalena
dc.contributor.authorAlvares, Cristian
dc.contributor.authorRamirez-Campillo, Rodrigo
dc.contributor.authorIzquierdo, Mikel
dc.contributor.authorMillet, Gregoire P.
dc.contributor.authorDel Rio, Rodrigo
dc.contributor.authorAndrade, David C.
dc.date.accessioned2025-01-20T23:52:09Z
dc.date.available2025-01-20T23:52:09Z
dc.date.issued2021
dc.description.abstractDuring an apnea, changes in PaO2 activate peripheral chemoreceptors to increase respiratory drive. Athletes with continuous apnea, such as breath-hold divers, have shown a decrease in hypoxic ventilatory response (HVR), which could explain the long apnea times; however, this has not been studied in swimmers. We hypothesize that the long periods of voluntary apnea in swimmers is related to a decreased HVR. Therefore, we sought to determine the HVR and cardiovascular adjustments during a maximum voluntary apnea in young-trained swimmers. In fifteen trained swimmers and twenty-seven controls we studied minute ventilation (V-E), arterial saturation (SpO(2)), heart rate (HR), and autonomic response [through heart rate variability (HRV) analysis], during acute chemoreflex activation (five inhalations of pure N-2) and maximum voluntary apnea test. In apnea tests, the maximum voluntary apnea time and the end-apnea HR were higher in swimmers than in controls (p < 0.05), as well as a higher low frequency component of HRV (p < 0.05), than controls. Swimmers showed lower HVR than controls (p < 0.01) without differences in cardiac hypoxic response (CHR). We conclude that swimmers had a reduced HVR response and greater maximal voluntary apnea duration, probably due to decreased HVR.
dc.fuente.origenWOS
dc.identifier.doi10.3389/fphys.2021.632603
dc.identifier.eissn1664-042X
dc.identifier.urihttps://doi.org/10.3389/fphys.2021.632603
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/94893
dc.identifier.wosidWOS:000627750300001
dc.language.isoen
dc.revistaFrontiers in physiology
dc.rightsacceso restringido
dc.subjectapnea
dc.subjectautonomic nervous system
dc.subjectchemosensitivity
dc.subjecthypoxia
dc.subjectswimming
dc.subject.ods03 Good Health and Well-being
dc.subject.odspa03 Salud y bienestar
dc.titleHypoxic Respiratory Chemoreflex Control in Young Trained Swimmers
dc.typeartículo
dc.volumen12
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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