Hypoxic peripheral chemoreflex stimulation-dependent cardiorespiratory coupling is decreased in swimmer athletes.
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Etat: Public
Version: de l'auteur⸱e
Licence: CC BY 4.0
ID Serval
serval:BIB_7BC52BFBC0BC
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Hypoxic peripheral chemoreflex stimulation-dependent cardiorespiratory coupling is decreased in swimmer athletes.
Périodique
Physiological reports
ISSN
2051-817X (Electronic)
ISSN-L
2051-817X
Statut éditorial
Publié
Date de publication
01/2024
Peer-reviewed
Oui
Volume
12
Numéro
1
Pages
e15890
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Publication Status: ppublish
Résumé
Swimmer 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 (R <sub>f</sub> ) and the heart rate (HR) time series during normoxia and acute chemoreflex activation induced by five consecutive inhalations of 100% N <sub>2</sub> . Comparing swimmers to control subjects, we observed a significant reduction in the hypoxic ventilatory responses to N <sub>2</sub> in swimmers (0.012 ± 0.001 vs. 0.015 ± 0.001 ΔV <sub>E</sub> /ΔVO <sub>2</sub> , and 0.365 ± 0.266 vs. 1.430 ± 0.961 ΔV <sub>E</sub> /ΔVCO <sub>2</sub> /ΔSpO <sub>2</sub> , 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.
Mots-clé
Humans, Athletes, Heart Rate, Hypoxia, Respiratory Rate, Time Factors, chemoreflex, coherence, hypoxia, swimmers
Pubmed
Web of science
Open Access
Oui
Création de la notice
16/01/2024 17:41
Dernière modification de la notice
23/01/2024 8:18