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Exercise hemorheology: classical data, recent findings and unresolved issues.

Philippe Connes1, Michael J Simmonds, Jean-Frederic Brun

  • 1UMR Inserm U665, Université des Antilles et de la Guyane, Pointe-à-Pitre, Guadeloupe. pconnes@yahoo.fr

Clinical Hemorheology and Microcirculation
|October 9, 2012
PubMed
Summary

Exercise impacts blood viscosity, with recent findings suggesting benefits for vascular function. This review explores exercise hemorheology, inconsistencies in research, and effects of training on cardiovascular and metabolic health.

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Area of Science:

  • Exercise physiology
  • Cardiovascular science
  • Hemodynamics

Background:

  • Exercise alters hemorheology, including hematocrit and blood viscosity.
  • Historically, increased blood viscosity was seen negatively, but recent research suggests potential benefits.
  • Factors like red blood cell deformability and aggregation are also affected by exercise.

Purpose of the Study:

  • To review current knowledge on exercise hemorheology.
  • To discuss unresolved issues and inconsistencies in the literature.
  • To examine the effects of exercise training on hemorheological profiles in various populations.

Main Methods:

  • Literature review of past and recent studies on exercise and hemorheology.
  • Analysis of factors influencing blood viscosity during and after exercise.

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  • Examination of data on red blood cell properties and plasma viscosity.

    • Main Results:

    • Acute exercise increases hematocrit and blood viscosity, potentially enhancing nitric oxide production.
    • Exercise affects red blood cell deformability and aggregation, independently influencing aerobic capacity.
    • Inconsistent findings exist regarding exercise effects on hemorheological parameters, likely due to protocol, population, and methodology variations.

    Conclusions:

    • Dynamic changes in blood viscosity during exercise may benefit vascular function.
    • Exercise training's impact on hemorheology warrants further investigation in healthy individuals and those with cardiovascular/metabolic disorders.
    • Standardization of research methods is needed to resolve discrepancies in exercise hemorheology findings.