Journal of Applied Physiology
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J Appl Physiol 60: 986-990, 1986;
8750-7587/86 $5.00
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Journal of Applied Physiology, Vol 60, Issue 3 986-990, Copyright © 1986 by American Physiological Society

ARTICLES

Physiological changes in hemostasis associated with acute exercise

M. E. Wheeler, G. L. Davis, W. J. Gillespie and M. M. Bern

Acute exercise enhances fibrinolytic (FA), factor VIII coagulant and factor VIII ristocetin cofactor activities, and increases the concentration of factor VIII-related antigen. Little is known concerning the mechanisms of these changes. To investigate possible relationships between exercise-induced changes in blood lactate, 2,3-diphosphoglycerate (DPG), and the hemostatic variables, a branching multistage treadmill protocol was used to exercise male volunteers to a maximum effort. Blood samples were drawn before, immediately post-, and 8 min postexercise. All hemostatic variables were significantly (P less than 0.05) increased postexercise. Highest values for factor VIII coagulant, factor VIII-related antigens and factor VIII ristocetin cofactor were observed at 8 min postexercise. Significant (P less than 0.001) correlations were found postexercise for lactate with factor VIII coagulant (r = 0.64), while no association between pre-, post-, or 8 min postexercise. Postexercise lactate demonstrated a significant correlation (r = +0.81), which was strengthened by including the preexercise high-density lipoprotein (HDL) concentrations (r = +0.87). Consequently, the expected postexercise FA may be calculated from the observed values for postexercise lactate and preexercise HDL. The correlations of lactate with postexercise FA and with postexercise factor VIII coagulant may reflect a common stimulus for these exercise-induced changes.


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