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Factor VIII complex in canine plasma after submaximal treadmill exercise.

M A Turrentine, A W Hahn, G S Johnson

    American Journal of Veterinary Research
    |January 1, 1986
    PubMed
    Summary
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    Submaximal exercise in dogs does not significantly alter plasma levels of factor VIII and von Willebrand factor. This study indicates that moderate physical activity does not impact these key blood clotting components in canine subjects.

    Area of Science:

    • Veterinary Medicine
    • Hematology
    • Exercise Physiology

    Background:

    • Coagulation factor VIII and von Willebrand factor are crucial for hemostasis.
    • Exercise is known to affect various physiological parameters, including the coagulation system.
    • Previous research has yielded conflicting results regarding exercise-induced changes in these factors.

    Purpose of the Study:

    • To investigate the effects of submaximal exercise on plasma concentrations of coagulation factor VIII and von Willebrand factor in adult dogs.
    • To determine if moderate treadmill exercise influences key hemostatic factors in a canine model.

    Main Methods:

    • Eight adult dogs were subjected to treadmill exercise for 5-10 minutes at speeds up to 18 km/hr.
    • Plasma samples were analyzed for factor VIII coagulant activity, coagglutinin co-factor activity, and factor VIII-related antigen.

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  • Heart rates and exercise parameters were monitored to confirm submaximal exertion.

    • Main Results:

    • Submaximal exercise did not lead to significant increases in plasma concentrations of factor VIII coagulant activity.
    • Plasma levels of coagglutinin co-factor activity and factor VIII-related antigen remained unchanged post-exercise.
    • The study confirmed that moderate exercise did not elevate these specific coagulation factors in dogs.

    Conclusions:

    • Submaximal exercise, as performed in this study, does not induce significant changes in plasma concentrations of coagulation factor VIII or von Willebrand factor in dogs.
    • These findings suggest that moderate physical activity may not be a strong stimulus for the release of these hemostatic factors in canines.
    • Further research could explore the effects of maximal or prolonged exercise on canine coagulation parameters.