Objective: The primary objective of the current application is to assess the efficacy of aerobic exercise as an intervention to improve asthma control and quality of life in adult patients with asthma. The results of this study will provide data that will inform physicians and members of the Thoracic community about the benefits of exercise for asthma. The study will also assess potential inflammatory pathways by which exercise may elicit improvements in asthma morbidity. The results of this study should be available for the next Canadian Thoracic Society Canadian Adult Consensus Guidelines.