PMID: 1209164Dec 1, 1975Paper

Relationship between urine flow, glomerular filtration, and urine solute concentrations during prolonged heavy exercise

Scandinavian Journal of Clinical and Laboratory Investigation
H E Refsum, S B Strömme

Abstract

Serum and urine electrolytes, creatinine, and urea were determined in 21 well-trained men, aged 21-56 years, in connection with a 70-km cross-country ski race, lasting 4.39-6.52 h, leading to slight dehydration. Although the race urine flow was low, averaging 0.41 (0.1-0.9) ml/min, the average urine concentrations of urea, Na, Ca, Mg, Cl and P were markedly lower than during the preceding night, while the concentrations of K and creatinine were higher, the total of measured solutes being 621 nmol/l, compared with 911 nmol/l during the preceding night. Decreasing urine flow and endogenous creatinine clearance were accompanied by a falling urine solute concentration, particularly when the race creatinine clearance decreased to below 70 ml/min, mainly due to a fall in the urea, Na, and Cl concentrations. Thus, a decrease in the glomerular filtration rate was accompanied by a progressive decline in the urine concentrating ability.

References

Oct 1, 1973·Scandinavian Journal of Clinical and Laboratory Investigation·H Jensen
May 1, 1974·Scandinavian Journal of Clinical and Laboratory Investigation·H E Refsum, S B Strömme
Jun 1, 1967·Acta Physiologica Scandinavica·J CastenforsM Piscator
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Citations

Dec 6, 1976·European Journal of Applied Physiology and Occupational Physiology·G Haralambie, A Berg
Jan 1, 1988·European Journal of Applied Physiology and Occupational Physiology·D BöningT O Wagner
Apr 12, 1979·European Journal of Applied Physiology and Occupational Physiology·J DécombazJ R Poortmans
Jan 1, 1985·European Journal of Applied Physiology and Occupational Physiology·P LijnenA Amery
Apr 27, 2010·Prostaglandins & Other Lipid Mediators·Matthew Blatnik, Rick C Steenwyk
Oct 1, 1980·Scandinavian Journal of Clinical and Laboratory Investigation·H HaugenH E Refsum
Jan 1, 1977·Annals of the New York Academy of Sciences·J Castenfors
Feb 1, 1978·Scandinavian Journal of Clinical and Laboratory Investigation·H E Refsum, S B Strømme
Sep 1, 1979·Scandinavian Journal of Clinical and Laboratory Investigation·H E RefsumS B Strømme
Feb 6, 1998·Journal of Applied Physiology·W SchmidtW G Forssmann
Jan 1, 1986·Acta Medica Scandinavica·H P AarsethE Thaulow
Sep 1, 1984·Journal of Clinical Chemistry and Clinical Biochemistry. Zeitschrift Für Klinische Chemie Und Klinische Biochemie·G M CostongsP J Brombacher
Apr 1, 1976·Scandinavian Journal of Haematology·H ArnesenH E Refsum
May 1, 1990·The Journal of Urology·J AbarbanelD Kimche
May 18, 2021·Temperature : Multidisciplinary Biomedical Journal·Christopher L ChapmanZachary Schlader

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