Fluid balance in exercise dehydration and rehydration with different glucose-electrolyte drinks

  • Bodil Nielsen
  • Gisela SjØgaard
  • Jacob Ugelvig
  • Bo Knudsen
  • Bengt Dohlmann
Article

Summary

After exercise dehydration (3% of body weight) the restoration of water and electrolyte balance was followed in 6 male subjects. During a 2 h rest period after exercise, a drink of one of four solutions was given as 9×300 ml portions at 15 min intervals: control (C-drink), high potassium (K-drink), high sodium (Na-drink) or high sugar (S-drink). An exercise test (submaximal and supramaximal work) was performed before dehydration and after rehydration. Dehydration reduced plasma volume by 16%, a process reversed on resting even before fluid ingestion began, due to release of water accumulated in the muscles during exercise. After 2 h rehydration, plasma volume was above the initial resting value with all 4 drinks. The final plasma volumes after the Na-drink (+14%) and C-drink (+9%) were significantly higher than after the K- and S-drinks. The Na-drink favoured filling of the extracellular compartment, whereas the K- and S-drinks favoured intracellular rehydration. In spite of the higher than normal plasma volume after rehydration, mean heart rate during the submaximal test was 10 bpm higher after rest and rehydration than in the initial test, and was not different between the drinks. The amount of work which could be performed in the supramaximal test (105%\(\dot V_{O_{_2 max} } \)) was 20% less after exercise dehydration and subsequent rest and rehydration than before. This reduction was similar for all drinks, and may be due to a decreased muscle glycogen content (70% of initial) at the time of the second test.

Key words

Plasma [Na]-[K] Muscle [Na]-[K]-glycogen Water compartments Physical work capacity 

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References

  1. Adolph EF, Brown AH, Goddard DR, Gosselin RE, Kelly JJ, Molnar GW, Rahn H, Rothstein A, Towbin EJ, Wills, JH, Wolf AV (1947) Physiology of man in the desert. New York InterscienceGoogle Scholar
  2. Bergström J (1962) Muscle electrolytes in man. Scand J Clin Lab Invest 14 [suppl] 68:1–110Google Scholar
  3. Bergström J, Guarnieri G, Hultman E (1971) Carbohydrate metabolism and electrolyte changes in human muscle tissue during heavy work. J Appl Physiol 30:122–125PubMedGoogle Scholar
  4. Clausen T, Wang P, Ørskov H, Kristensen O (1980) Hyperkalemi periodic paralysis. Relationships between changes in plasma water, electrolytes, insulin and catecholamines during attacks. Scand J Clin Lab Invest 40:211–220PubMedGoogle Scholar
  5. Convertino VA, Keil LC, Bernauer EM, Greenleaf JE (1981) Plasma volume, osmolality, vasopressin and renin activity during graded exercise. J Appl Physiol: Respirat Environ Exercise Physiol 50:123–128Google Scholar
  6. Cornét F, Scheen A, Juchmes J, Cession-Fossion A (1978) Déterminisme de la dérive lente de la fréquence cardiaque pendent l'exercise musculaire. CR Soc Biol 172:569–574Google Scholar
  7. Costill DL, Saltin B (1974) Factors limiting gastric emptying during rest and exercise. J Appl Physiol 37:679–683PubMedGoogle Scholar
  8. Costill DL, Sparks KE (1973) Rapid fluid replacement following thermal dehydration. J Appl Physiol 34:299–303PubMedGoogle Scholar
  9. Dill DB, Costill DL (1974) Calculation of percentage changes in volumes of blood, plasma and red cells in dehydration. J Appl Physiol 37:247–248PubMedGoogle Scholar
  10. Fordtran JS, Saltin B (1967) Gastric emptying and intestinal absorbtion during prolonged severe exercise. J Appl Physiol 23:331–335PubMedGoogle Scholar
  11. Fortney SM, Nadel ER, Wenger CB, Bove JR (1981a) Effect of acute alterations of blood volume on circulatory performance in humans. J Appl Physiol: Respirat Environ Exercise Physiol 50:292–298Google Scholar
  12. Fortney SM, Nadel ER, Wenger CB, Bove JR (1981b) Effect of blood volume on sweating rate and body fluids in exercising humans. J Appl Physiol: Respirat Environ Physiol 51:1594–1600Google Scholar
  13. Greenleaf JE, Sargent F II. Voluntary dehydration in man. J Appl Physiol 20:719–724Google Scholar
  14. Hiatt N, Yamakawa T, Davidson MB (1974) Necessity for insulin in transfer of excess infused K to intracellular Fluid. Metabolism 30:43–49Google Scholar
  15. Hunt JN, Pathak JD (1960) The osmotic effects of some simple molecules and ions on gastric emptying. J Physiol (Lond) 154:254–269Google Scholar
  16. Kanstrup I-L, Ekblom B (1982) Acute hypervolemia, cardiac performance and aerobic power during exercise. J Appl Physiol: Respirat Environ Exercise Physiol 52:1186–1191Google Scholar
  17. Karlsson J (1971) Lactate and phosphagen concentrations in working muscle of man. Acta Physiol Scand [Suppl] 358Google Scholar
  18. Krogh A, Trolle C (1936) A balance for the determination of insensible perspiration in man and its use. Skand Arch Physiol 73:159–162Google Scholar
  19. Moroff SV, Bass DE (1965) Effect of overhydration on man's physiological responses to work in the heat. J Appl Physiol 20:267–270Google Scholar
  20. Nielsen B, SjØgaard G, Bonde Petersen F (1984) Cardiovascular, hormonal and body fluid changes during prolonged exercise. Eur J Appl Physiol 53:63–70Google Scholar
  21. NiemelÄ KO, Palatsi IJ, IkÄheimo MJ, Takkunen JT, Vuori JJ (1984) Evidence of impaired left ventricular performance after an uninterrupted competitive 24 hour run. Circulation 70:350–356PubMedGoogle Scholar
  22. Novosadová J (1977) The changes in hematocrit, hemoglobin, plasma volume and proteins during and after different types of exercise. Eur J Appl Physiol 36:223–230CrossRefGoogle Scholar
  23. Sachs L (1976) Statistische Auswertungsmethoden. 3rd. Ed. Springer, Berlin Heidelberg New YorkGoogle Scholar
  24. Saltin B (1964) Circulatory response to submaximal and maximal exercise after thermal dehydration. J Appl Physiol 19:1125–1132PubMedGoogle Scholar
  25. Sawka MW, Knowlton RG, Critz JB (1979) Thermal and circulatory responses to repeated bouts of prolonged running. Med Sci Sports 11:177–180PubMedGoogle Scholar
  26. SjØgaard G (1983) Electrolytes in slow and fast muscle fibres of humans at rest and with dynamic exercise. Am J Physiol [Regulatory Integrative Comp Physiol] 245:R25-R31Google Scholar
  27. Vellar O (1969) Nutrient loss through sweating Universitetsforlaget, OsloGoogle Scholar

Copyright information

© Springer-Verlag 1986

Authors and Affiliations

  • Bodil Nielsen
    • 1
  • Gisela SjØgaard
    • 1
  • Jacob Ugelvig
    • 1
  • Bo Knudsen
    • 1
  • Bengt Dohlmann
    • 1
  1. 1.The Laboratory for the Theory of GymnasticsUniversity of Copenhagen, The August Krogh InstituteCopenhagen Ø.Denmark

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