title: Relationship between maximal pulmonary ventilation during exhaustive exercise and postexercise plasma potassium concentration in man.
abstract: The present study was undertaken to examine the relationship between maximal pulmonary ventilation (VEmax) and potassium concentration ([K+]) or lactate concentration ([La]) of venous blood in man. Nine healthy men performed exercise on a bicycle ergometer at a constant rate of 60 rpm until volitional fatigue. VEmax ranged from 100.4 to 153.2 l/min. In all subjects, potassium concentration measured at 1 min ([K+]1.0) after maximal exhaustive exercise was the highest, and it returned quickly to the resting level within a few minutes during recovery. VEmax was significantly correlated (r = 0.750, p < 0.05) to [K+]1.0, but not to lactate concentration determined at 1 min ([La]1.0) during recovery. These results suggest that a higher increase in blood [K+] may, at least partly, contribute to a greater augmentation of VE during exhaustive exercise.
authors.affiliation: Research Center of Health, Physical Fitness and Sports, Nagoya University, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Miyamura
authors.forename: K
authors.initials: K
authors.lastname: Ishida
authors.forename: T
authors.initials: T
authors.lastname: Ohkuwa
authors.forename: H
authors.initials: H
authors.lastname: Itoh
mesh_terms: D000328:Adult; D001835:Body Weight; D005080:Exercise Test; D006801:Humans; D007773:Lactates / Q000097:blood; D019344:Lactic Acid; D008297:Male; D010101:Oxygen Consumption; D005082:Physical Exertion / Q000502:physiology*; D011188:Potassium / Q000097:blood*; D012119:Respiration / Q000502:physiology*
chemical_list: D007773:Lactates; D019344:Lactic Acid; D011188:Potassium