HESPEL, P., P. LIJNEN, R. FIOCCHI, B. DENYS, W. LISSENS, J. R. MBUYAMBA-KABANGU, AND A. AMERY. Cationic concentrations and transmembrane fluxes in s of humans . J. Appl. Physiol. 61(l): 37-43, 1986.-The effect of on the intra cationic concentrations and transmembrane fluxes such as the Na+-K+-adenosinetriphosphatase (ATPase) pump, the Na-K+ cotransport, and the Na+-Li+ countertransport system was studied in 11 normal male volunteers. All subjects performed an uninterrupted incremental test on a bicycle ergometer, starting at an initial work load of 20% of the subjects maximal capacity, as determined in a pretest. The work rate was increased with an additional 20% each 6 min up to a final work load of 80%. Blood samples were taken at rest, at 60 and 80% of maximal capacity, and 1, 2, 3, 4, 5, and 30 min after cessation of . At moderate (60% of maximal capacity) the intra potassium concentration was not changed, but at severe (80% of maximal capacity) it was decreased. After the intra potassium concentration returned to base line within 2 min. did not affect the intra concentrations of sodium and magnesium. The activity of the Na-K+-ATPase pump and the Na+-K+ cotransport in the s and after
Journal of Applied Physiology – The American Physiological Society
Published: Jul 1, 1986
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