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<publisher>HAL CCSD</publisher>
<title lang=en>The oxygen-conserving potential of the diving response: A kinetic-based analysis</title>
<creator>Costalat, Guillaume</creator>
<creator>Coquart, Jeremy</creator>
<creator>Castres, Ingrid</creator>
<creator>Joulia, Fabrice</creator>
<creator>Sirost, Olivier</creator>
<creator>Clua, Eric</creator>
<creator>Lemaître, Frédéric</creator>
<contributor>Centre d’études des transformations des activités physiques et sportives (CETAPS) ; Université de Rouen Normandie (URN) ; Normandie Université (NU) - Normandie Université (NU)</contributor>
<contributor>Institut de Recherche Biomédicale des Armées (IRBA) ; Institut de Recherche des Armées</contributor>
<contributor>Dysoxie, suractivité : aspects cellulaires et intégratifs thérapeutiques (DS-ACI / UMR MD2) ; Aix Marseille Université (AMU) - Institut National de la Santé et de la Recherche Médicale (INSERM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Laboratoire d'Excellence CORAIL (LabEX CORAIL) ; Institut de Recherche pour le Développement (IRD) - Université des Antilles et de la Guyane (UAG) - École des hautes études en sciences sociales (EHESS) - École pratique des hautes études (EPHE) - Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) - Université de la Réunion (UR) - Université de la Polynésie Française (UPF) - Université de Nouvelle Calédonie - Institut d'écologie et environnement</contributor>
<contributor>Centre de recherches insulaires et observatoire de l'environnement (CRIOBE) ; Université de Perpignan Via Domitia (UPVD) - École pratique des hautes études (EPHE) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>International audience</description>
<source>ISSN: 0264-0414</source>
<source>EISSN: 1466-447X</source>
<source>Journal of Sports Sciences</source>
<publisher>Taylor & Francis: SSH Journals</publisher>
<identifier>hal-01325466</identifier>
<identifier>https://hal-univ-perp.archives-ouvertes.fr/hal-01325466</identifier>
<source>https://hal-univ-perp.archives-ouvertes.fr/hal-01325466</source>
<source>Journal of Sports Sciences, Taylor & Francis: SSH Journals, 2016, 〈10.1080/02640414.2016.1183809〉</source>
<identifier>DOI : 10.1080/02640414.2016.1183809</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1080/02640414.2016.1183809</relation>
<language>en</language>
<subject lang=en>NIRS</subject>
<subject lang=en>Diving reflex</subject>
<subject lang=en>breath-holding</subject>
<subject lang=en>haemodynamics</subject>
<subject lang=en>kinetics</subject>
<subject lang=en>oxygen-conserving effect</subject>
<subject>[SDV.SPEE] Life Sciences [q-bio]/Santé publique et épidémiologie</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>We investigated the oxygen-conserving potential of the human diving response by comparing trained breath-hold divers (BHDs) to non-divers (NDs) during simulated dynamic breath-holding (BH). Changes in haemodynamics [heart rate (HR), stroke volume (SV), cardiac output (CO)] and peripheral muscle oxygenation [oxyhaemoglobin ([HbO2]), deoxyhaemoglobin ([HHb]), total haemoglobin ([tHb]), tissue saturation index (TSI)] and peripheral oxygen saturation (SpO2) were continuously recorded during simulated dynamic BH. BHDs showed a breaking point in HR kinetics at mid-BH immediately preceding a more pronounced drop in HR (−0.86 bpm.%−1) while HR kinetics in NDs steadily decreased throughout BH (−0.47 bpm.%−1). By contrast, SV remained unchanged during BH in both groups (all P > 0.05). Near-infrared spectroscopy (NIRS) results (mean ± SD) expressed as percentage changes from the initial values showed a lower [HHb] increase for BHDs than for NDs at the cessation of BH (+24.0 ± 10.1 vs. +39.2 ± 9.6%, respectively; P < 0.05). As a result, BHDs showed a [tHb] drop that NDs did not at the end of BH (−7.3 ± 3.2 vs. −3.0 ± 4.7%, respectively; P < 0.05). The most striking finding of the present study was that BHDs presented an increase in oxygen-conserving efficiency due to substantial shifts in both cardiac and peripheral haemodynamics during simulated BH. In addition, the kinetic-based approach we used provides further credence to the concept of an “oxygen-conserving breaking point” in the human diving response.</description>
<date>2016-05</date>
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