Background: It is postulated that running at high speeds increases pulmonary pressures; this, combined with weakened blood vessels, causes vessels to rupture. Airway irritation and subclinical airway disease may also contribute to the syndrome.
Symptoms: Bleeding seen on endoscopic exam, post-exercise; in severe cases, bleeding seen at the nostrils.
Diagnostics: Endoscopic exam, history of poor race performance.
Principles for Supplementation: Strengthen blood vessels, decrease reactive airway disease.