Effect of Prolonged, Heavy Exercise on Urinary Protein Excretion and Plasma Renin Activity

Authors:
  • LBLjubomir Božovć
    Ljubomir Božovć
  • JCJan Castenfors
    Jan Castenfors
  • MPMacnus Piscator
    Macnus Piscator
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Abstract
Experimentally induced proteinuria by renin injection is a well‐known phenomenon. The aim of this investigation is to study the effect of prolonged, heavy, muscular exercise on plasma renin activity and its possible connection with exercise proteinuria. In a group of 15 male participants in theVasaloppetin 1965 (85 km ski race) the urinary protein excretion was studied before and during the ski race, and the plasma renin activity at the start and the end of the race. The increase both in plasma renin activity and in urinary protein excretion was statistically significant. During rest, before the ski race there was a significant correlation between plasma renin activity and protein excretion in the urine (r = 0.84), but not during the ski race.

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