Arterial oxygen saturation and heart rate variation during breath-holding: Comparison between breath-hold divers and controls
Deutscher übersetzter Titel: | Arterielle Sauerstoffsättigung und Herzfrequenzvariation beim Atemanhalten : Vergleich zwischen Apnoe-Tauchern und Kontrollpersonen |
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Autor: | Delahoche, J.; Delapille, P.; Lemaître, F.; Verin, E.; Tourny-Chollet, C. |
Erschienen in: | International journal of sports medicine |
Veröffentlicht: | 26 (2005), 3, S. 177-181, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
Sprache: | Englisch |
ISSN: | 0172-4622, 1439-3964 |
DOI: | 10.1055/s-2004-820976 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU200504001037 |
Quelle: | BISp |
Abstract des Autors
Breath-holding induces cardiovascular responses, notably bradycardia and peripheral vasoconstriction, which are known collectively as the diving response. This response is oxygen-conserving, i.e. an augmented response attenuates arterial oxygen desaturation, and is enhanced by apnoea training. To test this hypothesis, we compared heart rate (HR) and arterial oxygen saturation (SaO2) in breath-hold divers (BHD) and non-divers (ND). Nine BHD and nine healthy ND performed two static apnoeas (for 30 s and 45 s) and two dynamic apnoeas (for 30 s and 45 s) while swimming underwater at 0.7 m · s-1. The pool temperature was 26 °C. The apnoeas were performed at 60 % of forced vital capacity. Heart rate (HR) and SaO2 were recorded before breath-holding and at its end and are expressed in % change from rest values (ΔHR and ΔSaO2). Comparisons between BHD and ND showed that ΔSaO2 were lower in divers after both static apnoeas for 30 s and 45 s (- 2.8 % vs. - 5.5 %; - 3.2 % vs. 6.3 %; p<0.05, respectively) and dynamic apnoeas (- 6 % vs. - 10.1 %; - 7.2 % vs. - 12.3 %; p<0.05, respectively). The change in HR did not differ between the two groups and negative linear relations were found between ΔHR and ΔSaO2 in both divers and ND (r=0.66 and 0.61, respectively; p<0.001). Moreover, the slope was lower for the divers (- 0.785 vs. - 0.1429; p<0.001). Our results suggest that apnoea training explained the greater oxygen conservation seen in the divers in both static and dynamic conditions. Verf.-Referat