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Related Experiment Videos

Rheologic changes in venous blood during prolonged sitting.

M Hitosugi1, M Niwa, A Takatsu

  • 1Department of Forensic Medicine, Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Tokyo 105-8461, Minato-ku, Japan. hitosugi@jikei.ac.jp

Thrombosis Research
|January 11, 2001
PubMed
Summary

Long-term quiet sitting significantly increases blood viscosity in leg veins, indicating a localized increase in thrombotic tendency. This suggests the importance of measuring focal venous blood viscosity to assess risks associated with prolonged sitting.

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Area of Science:

  • Physiology
  • Hematology
  • Vascular Biology

Background:

  • Prolonged sedentary behavior is linked to various health issues.
  • Understanding blood rheology changes during inactivity is crucial for risk assessment.

Purpose of the Study:

  • To investigate the effects of 2-hour quiet sitting on blood rheologic changes, specifically blood viscosity.
  • To compare changes in blood viscosity between arm and foot veins.

Main Methods:

  • Blood samples were collected from healthy adult males before and after 2 hours of quiet sitting.
  • Blood viscosity was measured using an oscillation viscometer.
  • Blood count and chemistry were analyzed.

Main Results:

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  • Blood viscosity significantly increased in foot veins after 2 hours of sitting.
  • No significant increase in blood viscosity was observed in arm veins.
  • Findings suggest a localized increase in thrombotic tendency in the leg.

    • Conclusions:

    • Two hours of quiet sitting can induce local thrombotic tendency in the leg.
    • Systemic thrombotic tendency does not appear to be affected by short-term sitting.
    • Measuring focal venous blood viscosity is important for assessing risks related to prolonged sitting.