Effects of interval hypoxia on exercise tolerance: Special focus on patients with CAD or COPD

Burtscher, Martin, Gatterer, Hannes, Szubski, Christoph, Pierantozzi, Emanuela and Faulhaber, Martin (2010) Effects of interval hypoxia on exercise tolerance: Special focus on patients with CAD or COPD. Sleep and Breathing, 14 3: 209-220. doi:10.1007/s11325-009-0289-8


Author Burtscher, Martin
Gatterer, Hannes
Szubski, Christoph
Pierantozzi, Emanuela
Faulhaber, Martin
Title Effects of interval hypoxia on exercise tolerance: Special focus on patients with CAD or COPD
Journal name Sleep and Breathing   Check publisher's open access policy
ISSN 1520-9512
1522-1709
Publication date 2010-09
Year available 2009
Sub-type Article (original research)
DOI 10.1007/s11325-009-0289-8
Volume 14
Issue 3
Start page 209
End page 220
Total pages 12
Place of publication Heidelberg, Germany
Publisher Springer
Collection year 2011
Language eng
Formatted abstract
Introduction: Repeated short-term hypoxia (interval hypoxia) has been suggested to increase exercise tolerance by enhancing stress resistance and/or improving oxygen delivery. As low exercise tolerance contributes to mortality in patients with coronary artery disease (CAD) and chronic obstructive pulmonary disease (COPD), interval hypoxia might be a valuable preventive and therapeutic tool for these patients. Yet, mechanisms responsible for the improvement of exercise tolerance are still largely unknown. Therefore, this review intends to present an overview for better understanding of such mechanisms and to stimulate further research work on this important topic.
Data source: Articles were selected from a search of the PubMed database up to 2009 using the search terms hypoxia, intermittent, interval in various combinations with exercise, capacity, tolerance, CAD, COPD, and various haematological and cardio-respiratory parameters.
Results: Generally, the effects of 2-4 weeks of interval hypoxia on exercise tolerance are contrasting. Whereas aerobic exercise performance improved or remained unchanged, anaerobic performance tended even to worsen. Benefits on exercise tolerance seem to be greater in patients with CAD or COPD when compared to healthy subjects.
Discussion: The mechanisms responsible for these benefits are the increases in total haemoglobin mass, lung diffusion capacity, more efficient ventilation, and a decrease in the responsiveness of the adrenergic system to stimulation and/or an increase in parasympathetic activity. If confirmed in further studies, interval hypoxia might become an attractive strategy to complement the known beneficial effects of exercise training, especially in patients with CAD or COPD.
© Springer-Verlag 2009.
Keyword Coronary artery disease
Chronic obstructive pulmonary disease
Interval hypoxia
Exercise tolerance
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online: 18 August 2009

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
School of Health and Rehabilitation Sciences Publications
 
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Created: Sun, 29 Aug 2010, 00:00:39 EST