Physiological responses to repeated apneas in underwater hockey players and controls.

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Physiological responses to repeated apneas in underwater hockey players and controls.

Show simple item record Lemaître, F Polin, D Joulia, F Boutry, A Le Pessot, D Chollet, D Tourny-Chollet, C 2009-05-27T13:44:01Z 2009-05-27T13:44:01Z 2007
dc.identifier.citation Undersea Hyperb Med. 2007 Nov-Dec;34(6):407-14. en
dc.identifier.isbn 1066-2936
dc.identifier.other PMID: 18251437
dc.description Undersea & Hyperbaric Medicine : Journal of the Undersea and Hyperbaric Medical Society, Inc. en
dc.description.abstract The aim of this study was to investigate the effects of short repeated apneas on breathing pattern and circulatory response in trained (underwater hockey players: UHP) and untrained (controls: CTL) subjects. The subjects performed five apneas (A1-A5) while cycling with the face immersed in thermoneutral water. Respiratory parameters were recorded 1 minute before and after each apnea and venous blood samples were collected before each apnea and at 0, 2, 5 and 10 minutes after the last apnea. Arterial saturation (SaO2) and heart rate were continuously recorded during the experiment. Before the repeated apneas, UHP had lower ventilation, higher P(ET)CO2 (p < 0.05) and lower P(ET)O2 than CTL (p < 0.001). After the apneas, the P(ET)O2 values were always lower in UHP (p < 0.001) than CTL but with no difference for averaged P(ET)CO2 (p = 0.32). The apnea response, i.e., bradycardia and increased mean arterial blood pressure, was observed and it remained unchanged throughout the series in the two groups. The SaO, decreased in both groups during each apnea but the post-exercise SaO2 values were higher in UHP after A2 to A5 than in CTL (p < 0.01). The post-apnea lactate concentrations were lower in UHP than in CTL. These results indicate that more pronounced bradycardia could lead to less oxygen desaturation during repeated apneas in UHP. The UHP show a specific hypoventilatory pattern after repeated apneas, as well as a more pronounced cardiovascular response than CTL. They indeed showed no detraining of the diving response. en
dc.format.extent 1472459 bytes
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Undersea and Hyperbaric Medical Society en
dc.subject DIVERS en
dc.subject DIVING en
dc.subject apneas en
dc.subject breathing pattern en
dc.subject circulatory response en
dc.subject breath-hold en
dc.subject breathhold en
dc.subject human en
dc.subject underwater hockey players en
dc.subject face immersion en
dc.subject training en
dc.subject.mesh Adult Analysis of Variance Apnea/blood Apnea/physiopathology* Blood Pressure/physiology* Bradycardia/blood Bradycardia/physiopathology Carbon Dioxide/blood Case-Control Studies Diving/physiology* Heart Rate/physiology* Hockey/physiology* Humans Male Oxygen/blood Respiration Vasoconstriction/physiology Substances: Carbon Dioxide Oxygen en
dc.title Physiological responses to repeated apneas in underwater hockey players and controls. en
dc.type Article en

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