Exercise-Induced Asthma: Time Course of Refractory Period Jae-Young Kwon, Don McKenzie, Jane LaBreche School of Human Kinetics, University of British Columbia, Allan McGavin Sports Medicine Centre • To asses the time frame required for pulmonary function to return to baseline after two exercise bouts following proper warm-up in asthmatics. Purpose Figure 1. Change in FEV1 (Forced Expiratory Volume in 1 second) after first bout of exercise following warm-up. Figure 3. Both subjects showing normal spirometry on maximal expiratory flow volume (MEFV) maneuvers after exercise. Figure 2. Change in FEV1 (Forced Expiratory Volume in 1 second) after second bout of exercise following warm-up. Conclusion Subject A Subject B Methods • Subject A and B (Fig 1 & 2) maintained their pulmonary function after exercise, suggesting that the warm-up helped to dilate the lungs. • Although there are variability between subjects, it is safe to conclude that thirty minutes after the first bout of exercise is enough for lungs to return to baseline conditions. • Future research should focus on how the refractory period could be used to treat exercise-induced asthmatics instead of medications. • Exercise-induced asthma is a narrowing of the airways with symptoms of wheezing, chest tightness, and coughing that is triggered by exercise. • Refractory period is the time after asthma attack when an individual is at decreased risk of developing a second attack. • Only half of the subjects with exercise- induced asthma demonstrate refractory period which lasts up to four hours. • In previous asthmatic studies, lungs narrowed without proper warm-up exercise. On the other hand, lungs dilated if warm-up intensity was increased to 60% of maximal exercise capacity. What We Know
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Exercise-induced asthma : time course of refractory period Kwon, Jae-Young; McKenzie, Don; LaBreche, Jane 2010-03-15
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Item Metadata
Title | Exercise-induced asthma : time course of refractory period |
Creator |
Kwon, Jae-Young McKenzie, Don LaBreche, Jane |
Date Issued | 2010-03-15 |
Subject |
Exercise-Induced asthma Refractory period Asthma |
Genre |
Poster |
Type |
Text |
Language | eng |
Series |
University of British Columbia. Multidisciplinary Undergraduate Research Conference (MURC) |
Date Available | 2010-03-15 |
Provider | Vancouver : University of British Columbia Library |
Rights | Attribution-NonCommercial-NoDerivatives 4.0 International |
DOI | 10.14288/1.0081276 |
URI | http://hdl.handle.net/2429/21878 |
Affiliation |
Education, Faculty of Human Kinetics (HKIN), School of |
Campus |
UBCV |
Peer Review Status | Unreviewed |
Scholarly Level | Undergraduate |
Rights URI | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
AggregatedSourceRepository | DSpace |
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