FIGURE 1.

a) Continuous laryngoscopy exercise testing setup: the test subject exercises on a stationary ergometer bicycle with a laryngoscope in situ, fastened to specialist headgear. The subject performs an incremental-load exercise test to volitional maximum, while laryngoscopic recordings are saved for subsequent review. Note the laryngoscopic image on-screen showing a healthy larynx anatomy during inspiration. b) Laryngoscopic image (anonymised), taken during inspiration of an individual with supraglottic exercise-induced laryngeal obstruction (EILO), i.e. medial collapse of the arytenoid and aryepiglottic mucosa. The vocal folds are not affected. c) Laryngoscopic image, taken during inspiration of an individual with glottic EILO, i.e. a medial movement of the vocal folds.