EN
The purpose of this examination was to investigate the influence of intensive exertion during long distance races at distances of 60 km, 90 km, 120 km on selected indicators of blood coagulation and hematology of sport horses. The examination was performed on 40 clinically healthy pure Arabian horses, running in distance races of 60 km, 90 km, 120 km. The blood was obtained from vena jugularis externa, before and 40 min after race. The exercise activates both coagulation and fibrinolysis. The change a ratio of coagulation indicators depend on the intensity and duration of exertion: a run at a distance 60 km intensifies fibrinolysis, a run at a distance of 90 km intensifies coagulation, a run at a distance of 120 km indicates disturbances of equilibrium between coagulation and fibrinolysis. Changes in blood coagulation indicators in long distance race horses can demonstrate the pathological influence of the maladjustment of exertion to the efficiency of horses.