Lung Volume Recruitment for Lung Function and Cough Impairment in Multiple Sclerosis

Inclusion Criteria: * History of multiple sclerosis, diagnosed by a neurologist in accordance with the 2010 McDonald criteria Exclusion Criteria: * Concomitant parenchymal pulmonary disease or pleural disease * Symptomatic cardiomyopathy * Unable to perform pulmonary function testing or lung volume recruitment, due to comprehension or cooperation issues, physical inability such as bulbar or cerebellar dysfunction * Contra-indication to pulmonary function testing or lung volume recruitment such as myocardial infarction, bleeding aortic aneurysm, intracranial hemorrhage within the previous month * Known susceptibility to pneumothorax or pneumomediastinum * Not competent to provide informed consent