Correction of water content and solute concentration in blood during hemoconcentration

J Appl Physiol Respir Environ Exerc Physiol. 1977 May;42(5):739-43. doi: 10.1152/jappl.1977.42.5.739.


Eleven, healthy male students were subjected to an exhaustive bicyle ergometer exercise. Many parameters of hemoconcentration were examined in blood and urine samples which were collected before and after exercise. In an exercise lasting approximately 10 min, it was found that serum total protein (STP) would be a suitable parameter that could be used to calculate water content and actual decrease in water volume in blood due to exercise. Further, it is described how STP values before and during hemoconcentration can be used to eliminate the effect of plasma water loss from the determined values of various solute levels in blood.

MeSH terms

  • Adult
  • Blood / metabolism
  • Blood Proteins / metabolism*
  • Blood Urea Nitrogen
  • Body Weight
  • Chlorides / blood
  • Erythrocyte Count
  • Hematocrit
  • Humans
  • Male
  • Nitrogen / urine
  • Osmotic Pressure
  • Phosphates / blood
  • Physical Exertion*
  • Potassium / blood
  • Sodium / blood
  • Uric Acid / blood
  • Water / metabolism
  • Water-Electrolyte Balance*


  • Blood Proteins
  • Chlorides
  • Phosphates
  • Water
  • Uric Acid
  • Sodium
  • Nitrogen
  • Potassium