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Changes in cold-induced vasodilation during Arctic exercises

S D Livingstone

    Journal of Applied Physiology
    |March 1, 1976
    PubMed
    Summary
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    Exposure to extreme cold negatively impacts cold-induced vasodilation (CIVD) in military personnel. Arctic conditions worsened CIVD responses, indicating a detrimental effect on peripheral circulation.

    Area of Science:

    • Environmental Physiology
    • Military Medicine

    Background:

    • Cold exposure can alter peripheral vascular responses.
    • Understanding cold-induced vasodilation (CIVD) is crucial for personnel in cold climates.

    Purpose of the Study:

    • To investigate the impact of a 2-week Arctic deployment on cold-induced vasodilation (CIVD).

    Main Methods:

    • Assessed CIVD in military personnel before and after a 2-week Arctic stay.
    • Measured finger temperature response to ice water immersion.

    Main Results:

    • Post-Arctic deployment showed decreased mean finger temperature during CIVD testing.
    • Increased time to initial vasodilative temperature increase was observed.
    • Lowered finger temperature threshold for vasodilation initiation.

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    Conclusions:

    • Short-term Arctic cold exposure had a deleterious effect on CIVD.
    • Findings suggest general, rather than peripheral, acclimation to cold stress.