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Haemorheology in exercise and training.

Mahmoud S El-Sayed1, Nagia Ali, Zeinab El-Sayed Ali

  • 1Faculty of Science, School of Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, England. m.s.elsayed@livjm.ac.uk

Sports Medicine (Auckland, N.Z.)
|August 4, 2005
PubMed
Summary

Regular exercise impacts blood rheology, potentially increasing viscosity acutely due to hemoconcentration. Endurance training, however, leads to more dilute blood, enhancing oxygen delivery and performance.

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Area of Science:

  • Exercise physiology
  • Cardiovascular health
  • Blood rheology

Background:

  • Blood rheology disruption is a cardiovascular disease risk factor.
  • Exercise's effects on blood rheology are under-researched.
  • Acute exercise may increase blood viscosity.

Purpose of the Study:

  • To examine the effects of exercise on blood rheology.
  • To investigate the long-term impacts of endurance training on blood rheology.
  • To explore the relationship between exercise, hemoconcentration, and oxidative stress.

Main Methods:

  • Review of existing cross-sectional and longitudinal studies.
  • Analysis of hematocrit and plasma viscosity changes.
  • Assessment of red blood cell deformability and aggregability.

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Main Results:

  • Acute exercise can increase whole blood and plasma viscosity, primarily due to hemoconcentration.
  • Endurance training leads to blood dilution, increased plasma volume, and potentially improved oxygen delivery.
  • Mechanisms and functional consequences of exercise-induced rheological changes require further study.

Conclusions:

  • Exercise significantly influences blood rheology, with acute and chronic effects differing.
  • Endurance training appears to optimize blood rheology for enhanced physiological function.
  • Further research is needed to clarify the impact of various training types and overtraining on blood rheology.