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Blood hemostasis in exercise and training.

M S El-Sayed1, C Sale, P G Jones

  • 1Research Institute for Sport and Exercise Sciences, School of Human Sciences, Liverpool John Moores University, England. M.EISAYED@LIVJM.ac.uk

Medicine and Science in Sports and Exercise
|May 5, 2000
PubMed
Summary

Exercise impacts blood clotting and clot dissolution, with moderate activity enhancing clot breakdown. Heavy exercise activates both clotting and clot breakdown, but the overall effects of training on hemostasis require further study.

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Area of Science:

  • Physiology
  • Hemostasis
  • Exercise Science

Background:

  • Blood clot formation and dissolution are balanced by coagulation and fibrinolytic systems.
  • Exercise influences blood hemostasis, affecting coagulation, fibrinolysis, and platelet function.
  • Existing research presents conflicting results on exercise's precise impact on blood hypercoagulability.

Purpose of the Study:

  • To review the effects of exercise and physical training on blood hemostasis.
  • To clarify the relationship between exercise-induced changes in coagulation and fibrinolysis.
  • To highlight the need for further research on exercise training's long-term effects on hemostasis.

Main Methods:

  • Review of existing literature on exercise and blood hemostasis.
  • Analysis of studies examining acute exercise effects on coagulation parameters (e.g., APTT, FVIII, fibrinogen).

Related Experiment Videos

  • Examination of research on exercise-induced changes in fibrinolysis (tPA, PAI) and platelet function.

    • Main Results:

    • Acute exercise can transiently increase blood coagulation (shortened APTT, increased FVIII).
    • Moderate exercise enhances fibrinolysis, while very heavy exercise activates both coagulation and fibrinolysis.
    • Effects of exercise on plasma fibrinogen and platelet aggregation remain debated.

    Conclusions:

    • Exercise exerts complex effects on blood hemostasis, with varying impacts based on intensity and duration.
    • The physiological significance of exercise-induced hyperfibrinolysis is not fully understood.
    • More comprehensive studies are needed to determine the long-term benefits of exercise training on blood coagulation, fibrinolysis, and platelet function.