Feasibility of Constant Work Rate Testing to Detect Exercise-induced Laryngeal Obstruction

Inclusion Criteria: * Participant is willing and able to give informed consent for participation in the study. * Male or Female, aged 18 or above with a clinical suspicion of having EILO. * Individuals with concurrent asthma can participate in the study provided that their asthma is well-controlled, determined by a negative bronchoprovocation test. Exclusion Criteria: * No EILO found in Clinical standard-of-care CLE test * Not able to complete the exercise test for other reasons than breathlessness or leg fatigue (e.g. injury, disease or disability preventing cycling to maximal exertion). * Comorbidities other than asthma, which, judged by the investigator, might confound the test results or pose a medical risk to the patient (e.g. cardiac disease, exercise-induced anaphylaxis). * Current smokers (\< 6 months of stopping) or individuals with a significant smoking history (\>10 pack years). * Pregnancy.