Effect of Prolonged Exercise on Arterial Oxygen Saturation in Athletes Susceptible to Exercise-Induced Hypoxemia

Stewart, Ian B. & Pickering, Rachel L. (2007) Effect of Prolonged Exercise on Arterial Oxygen Saturation in Athletes Susceptible to Exercise-Induced Hypoxemia. Scandinavian Journal of Medicine and Science in Sports, 17(4), pp. 445-451.

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This study examined the effect of prolonged endurance exercise on the development of exercise-induced hypoxemia (EIH) in athletes who had previously displayed EIH during an incremental maximal exercise test. Five male and three female endurance-trained athletes participated. Susceptibility to EIH was confirmed through a maximal incremental exercise test and defined as a reduction in the saturation of arterial oxygen (SpO2) of ≥4% from rest. Sixty minutes of running was conducted, on a separate day, at an oxygen consumption corresponding to 95% of ventilatory threshold. Immediately following the 60 min exercise bout, athletes commenced a time trial to exhaustion at 95% maximal oxygen consumption (VO2max). The reduction in SpO2 was significantly greater during the maximal incremental test, than during the 60 min, or time trial to exhaustion (−8.8±1.4%, −3.3±1.1%, and −4.1±2.3%, P<0.05, respectively). The degree of desaturation during the 60 min was significantly related to the relative intensity of exercise at 95% ventilatory threshold (adjusted r2=0.54, P=0.02). In conclusion, athletes who did not exercise at greater than 73% VO2max during 60 min of endurance exercise did not display EIH, despite being previously susceptible during an incremental maximal test.

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ID Code: 12583
Item Type: Journal Article
Refereed: Yes
Additional Information: For more information, please refer to the journal's website (see hypertext link) or contact the author.
Keywords: arterial oxygen saturation, endurance, athlete, pulse oximetry
DOI: 10.1111/j.1600-0838.2006.00563.x
ISSN: 0905-7188
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > HUMAN MOVEMENT AND SPORTS SCIENCE (110600)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2007 Blackwell Publishing
Deposited On: 02 Sep 2008 00:00
Last Modified: 29 Feb 2012 13:38

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