Relationship between maximal pulmonary ventilation during exhaustive exercise and postexercise plasma potassium concentration in man.
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.
Miyamura
M
M
Research Center of Health, Physical Fitness and Sports, Nagoya University, Japan.
Ishida
K
K
Ohkuwa
T
T
Itoh
H
H
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*
D007773:Lactates; D019344:Lactic Acid; D011188:Potassium