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Finger blood flow decrease in leg exercise

K Kitamura, K Hangyo, K Yamaji

    The Japanese Journal of Physiology
    |January 1, 1982
    PubMed
    Summary
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    Leg exercise rapidly reduces finger blood flow (FBF) in all subjects. This decrease in FBF during exercise appears independent of exercise intensity, suggesting a systemic response.

    Area of Science:

    • Physiology
    • Exercise Science
    • Cardiovascular Research

    Background:

    • Understanding the body's response to exercise is crucial for health and performance.
    • Investigating blood flow redistribution during physical activity provides insights into physiological regulation.

    Purpose of the Study:

    • To examine the impact of leg exercise on finger blood flow (FBF).
    • To determine if exercise intensity affects the reduction in FBF.

    Main Methods:

    • Finger blood flow (FBF) was measured using mercury-in-silastic strain gauge venous occlusion plethysmography.
    • Participants performed 2-minute leg exercise on a bicycle ergometer at varying intensities (0, 60, 90, 120 watts).
    • Measurements were taken before, during, and after exercise.

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    Main Results:

    • FBF significantly decreased immediately upon initiation of leg exercise in all participants.
    • Reduced FBF levels were sustained throughout the exercise period.
    • The magnitude of FBF reduction during exercise did not vary with exercise intensity.

    Conclusions:

    • Leg exercise induces a rapid and sustained decrease in peripheral blood flow to the fingers.
    • This reduction in finger blood flow appears to be a non-specific response to exercise, irrespective of intensity.