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Haemorrheology and long term exercise

D Neuhaus1, P Gaehtgens

  • 1Freie Universität Berlin, Department of Physiology, Germany.

Sports Medicine (Auckland, N.Z.)
|July 1, 1994
PubMed
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Haemorrheological (blood flow) changes during long-term exercise are minimal due to water balance and electrolyte control. Endurance training reduces blood viscosity by expanding plasma volume.

Area of Science:

  • Exercise Physiology
  • Haemorheology
  • Cardiovascular Physiology

Background:

  • Haemorheological alterations during exercise are influenced by haematological parameters like haematocrit and plasma protein levels.
  • Acute changes in these parameters during exercise are typically small, especially in the short term.
  • Maintaining fluid and electrolyte balance is crucial for mitigating significant haemorheological shifts.

Purpose of the Study:

  • To investigate the acute changes in haemorheology during long-term exercise.
  • To understand the impact of haematological parameters on blood viscosity during exercise.
  • To examine the effects of endurance training on haemorheology.

Main Methods:

  • Analysis of haemorheological parameters (e.g., blood viscosity, plasma viscosity).

Related Experiment Videos

  • Measurement of haematological factors (e.g., haematocrit, plasma protein levels).
  • Assessment of fluid balance and electrolyte control during exercise.

    • Main Results:

    • Long-term exercise shows minimal haemorheological changes despite cardiorespiratory alterations, attributed to water and electrolyte balance.
    • Exercise leads to increased plasma protein levels and plasma viscosity, but small haematocrit changes limit blood viscosity alterations.
    • Endurance training induces haemodilution, reducing both blood and plasma viscosity; red blood cell deformability shows variable responses.

    Conclusions:

    • Haemorheological changes during submaximal exercise may have limited impact on aerobic capacity.
    • Maximal exercise may induce more significant haemorheological alterations due to full cardiovascular reserve recruitment.
    • Fluid balance and haematological factors are key determinants of haemorheological responses to exercise.