Document Detail

Seasonal fluctuations in airway responsiveness in elite endurance athletes.
MedLine Citation:
PMID:  15510246     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: It has been suggested that exposure to winter training conditions (irritants in indoor facilities and/or cold, dry air in the outdoors) can increase airway responsiveness in elite endurance athletes. OBJECTIVES: It has yet to be elucidated whether elite endurance athletes experience seasonal fluctuations in their airway responsiveness. METHODS: Eighteen members of a varsity cross-country running team underwent screening procedures and five members were enrolled in the study. Each athlete completed a respiratory and training questionnaire, and underwent allergy skin prick testing. Airway responsiveness was evaluated using a methacholine challenge on four occasions. RESULTS: The participants demonstrated a significant (more than twofold) increase in airway responsiveness (P=0.0496) during the first winter evaluation compared with the autumn baseline. The second winter evaluation still showed an increase but it was not statistically significant. Airway responsiveness had returned to baseline (autumn) values at spring testing. CONCLUSION: Elite endurance athletes experience seasonal fluctuations in airway responsiveness. The specific stimuli that cause this are unknown, but it is speculated to be due to exposure to cold, dry air and/or inhaled irritants that may be present in indoor training facilities.
Howard B Hemingson; Beth E Davis; Donald W Cockcroft
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Canadian respiratory journal : journal of the Canadian Thoracic Society     Volume:  11     ISSN:  1198-2241     ISO Abbreviation:  Can. Respir. J.     Publication Date:  2004 Sep 
Date Detail:
Created Date:  2004-10-28     Completed Date:  2005-02-08     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  9433332     Medline TA:  Can Respir J     Country:  Canada    
Other Details:
Languages:  eng     Pagination:  399-401     Citation Subset:  IM    
Department of Physiology, College of Medicine, University of Saskatchewan, Saskatoon, Canada.
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MeSH Terms
Bronchial Hyperreactivity*
Bronchial Provocation Tests / methods
Bronchoconstrictor Agents / diagnostic use
Cold Temperature / adverse effects*
Forced Expiratory Volume
Methacholine Chloride / diagnostic use
Skin Tests
Reg. No./Substance:
0/Bronchoconstrictor Agents; 62-51-1/Methacholine Chloride

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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