[Relationship between the activity of the kallikrein, plasmin and thrombin systems of the blood during intense physical exertion].

The authors studied the changes in the level of precursors of kallikrein, plasmine, and their inhibitors with the aid of a complex method. Blood plasma of sportsmen was examined--of healthy persons and of those with the syndrome of myocardial overstraining under conditions of rest and intensive bicycle ergometric exercises. The results obtained and correlation analysis data pointed to the functional association of the "Hageman's factor system". Sportsmen with the overstrain syndrome displayed an aggravation of the functional possibilities of humoral systems of the hemovascular regulation, this being expressed in a reduced level of the proenzymatic activity and a reduction of the inhibitor values. Correlation of the mentioned indices was disturbed both at rest and during the exercises.