Cardio-ventilatory responses to poikilocapnic hypoxia and hypercapnia in trained breath-hold divers

Respiratory Physiology & Neurobiology
Guillaume CostalatF Lemaitre

Abstract

Trained breath-hold divers (BHDs) are exposed to repeated bouts of intermittent hypoxia and hypercapnia during prolonged breath-holding. It has thus been hypothesized that their specific training may develop enhanced chemo-responsiveness to hypoxia associated with reduced ventilatory response to hypercapnia. Hypercapnic ventilatory responses (HCVR) and hypoxic ventilatory responses at rest (HVRr) and exercise (HVRe) were assessed in BHDs (n=7) and a control group of non-divers (NDs=7). Cardiac output (CO), stroke volume (SV) and heart rate (HR) were also recorded. BHDs presented carbon dioxide sensitivity similar to that of NDs (2.85±1.41 vs. 1.85±0.93Lmin(-1)mmHg(-1), p>0.05, respectively). However, both HVRr (+68%) and HVRe (+31%) were increased in BHDs. CO and HR reached lower values in BHDs than NDs during the hypoxic exercise test. These results suggest that the exposure to repeated bouts of hypoxia/hypercapnia frequently experienced by trained breath-hold divers only enhances their chemo-responsiveness to poikilocapnic hypoxia, without altering HCVR.

References

Jan 1, 1981·The Japanese Journal of Physiology·Y MasudaY Honda
Jun 1, 1995·Respiration Physiology·J R FeinerJ W Severinghaus
Aug 1, 1994·Respiration Physiology·B GrassiP Cerretelli
Aug 10, 2000·European Journal of Applied Physiology·E SchagatayB Holm
Feb 1, 2002·European Journal of Applied Physiology·P DelapilleP Pasquis
Jul 23, 2003·Respiratory Physiology & Neurobiology·Fabrice JouliaYves Jammes
Oct 7, 2003·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Guido Ferretti, Mario Costa
Feb 27, 2004·International Journal of Sports Medicine·N TordiR L Hughson
Feb 1, 2005·Scandinavian Journal of Medicine & Science in Sports·G E Foster, A W Sheel
Mar 1, 2005·Respiratory Physiology & Neurobiology·Keisho KatayamaMiharu Miyamura
Apr 14, 2005·European Journal of Applied Physiology·Joanne WelsmanNeil Armstrong
Nov 8, 2005·Experimental Physiology·M J Parkes
Nov 25, 2005·European Journal of Applied Physiology·Julien V BrugniauxJean-Paul Richalet
Jan 13, 2006·Clinical and Experimental Pharmacology & Physiology·Darija BakovićZeljko Dujić
Jul 4, 2006·Respiratory Physiology & Neurobiology·Craig D Steinback, Marc J Poulin
Mar 16, 2007·International Journal of Sports Medicine·K KatayamaM Miyamura
Apr 7, 2007·The Journal of Physiology·Vladimir IvancevZeljko Dujic
Apr 17, 2007·Respiratory Physiology & Neurobiology·Xavier WooronsChristine Lamberto
Nov 10, 2007·Journal of Applied Physiology·Zeljko DujicJens Jordan
Dec 22, 2007·European Journal of Applied Physiology·Robert de BruijnErika Schagatay
Dec 28, 2007·Respiratory Physiology & Neurobiology·Xavier WooronsChristine Lamberto
Nov 1, 2008·Journal of Applied Physiology·Peter Lindholm, Claes E G Lundgren
Nov 20, 2008·European Journal of Applied Physiology·Johan P A Andersson, Erika Schagatay
Sep 22, 2009·Clinical Autonomic Research : Official Journal of the Clinical Autonomic Research Society·Jean-Paul RichaletJean-Luc Elghozi
Oct 13, 2009·Clinical Autonomic Research : Official Journal of the Clinical Autonomic Research Society·Toni BreskovicZeljko Dujic
Oct 24, 2009·Medical Hypotheses·Frédéric LemaîtreDidier Chollet
Nov 21, 2009·Autonomic Neuroscience : Basic & Clinical·Toni BreskovicZeljko Dujic
Apr 16, 2010·Physiological Reviews·Luc J Teppema, Albert Dahan
Apr 27, 2010·Progress in Cardiovascular Diseases·Robert Naeije
Aug 13, 2010·Respiratory Research·Samuel VergesBernard Wuyam
Dec 24, 2011·Journal of Applied Physiology·François J LhuissierJean-Paul Richalet
Aug 3, 2012·Scandinavian Journal of Medicine & Science in Sports·M WilleM Burtscher

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Citations

May 12, 2016·Journal of Sports Sciences·Guillaume CostalatFrédéric Lemaître
Jun 22, 2021·Respiratory Physiology & Neurobiology·Heng PengIsao Muraoka

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