title: Metabolic changes preceding exercise-induced bronchoconstriction.
abstract: Five asthmatics aged 25-30 were studied during bicycle ergometer and treadmill exercise. Metabolic and ventilatory changes during exercise were compared with the degree of bronchoconstriction which followed exercise. In all patients bronchoconstriction was greater after treadmill exercise. Contrary to previous suggestions, exercise-induced bronchoconstriction did not seem to be caused by lactic acidosis, increase in minute ventilation, acidaemia, hypocapnia, or change in arterial Po(2)
mesh_terms: D000138:Acidosis; D000328:Adult; D001158:Arteries; D001249:Asthma / Q000378:metabolism* / Q000503:physiopathology; D001769:Blood; D001980:Bronchi / Q000503:physiopathology*; D002245:Carbon Dioxide / Q000097:blood; D003250:Constriction / Q000503:physiopathology; D005260:Female; D006339:Heart Rate; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007773:Lactates / Q000097:blood; D008297:Male; D010100:Oxygen / Q000097:blood; D010101:Oxygen Consumption; D005082:Physical Exertion; D012119:Respiration
chemical_list: D007773:Lactates; D002245:Carbon Dioxide; D010100:Oxygen