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Exercise and the cutaneous circulation.

J M Johnson

    Exercise and Sport Sciences Reviews
    |January 1, 1992
    PubMed
    Summary
    This summary is machine-generated.

    Exercise initially causes vasoconstriction, overriding heat-induced vasodilation. This response, affecting skin blood flow (SKBF), is dependent on dynamic muscle activity and alters thermoregulation during exercise.

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    Area of Science:

    • Physiology
    • Thermoregulation
    • Cutaneous Circulation

    Background:

    • Cutaneous circulation control is complex and not fully understood.
    • Exercise significantly influences skin blood flow (SKBF) through vasoconstriction and altered vasodilation thresholds.
    • Understanding these interactions is crucial for thermoregulation research.

    Purpose of the Study:

    • To elucidate the multifaceted effects of exercise on cutaneous circulation.
    • To investigate how exercise modulates thermoregulatory responses in the skin.
    • To identify the mechanisms underlying exercise-induced alterations in skin blood flow.

    Main Methods:

    • The study reviews existing literature on exercise and cutaneous circulation.
    • It analyzes the roles of the adrenergic vasoconstrictor and active vasodilator systems.

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  • Experimental observations on skin blood flow during various exercise conditions are discussed.

    • Main Results:

    • Exercise initiates cutaneous vasoconstriction, competing with thermoregulatory vasodilation.
    • Dynamic, large-muscle exercise is required for this vasoconstrictor response.
    • Exercise lowers the internal temperature threshold for vasodilation and limits vasodilation during heat stress.

    Conclusions:

    • Exercise exerts significant non-thermoregulatory control over cutaneous circulation.
    • The active vasodilator system plays a key role in exercise-induced thermoregulatory modifications.
    • Further research is needed to understand the mechanisms of active vasodilation and sensory control during exercise.