Abstract

Blood clotting and blood viscosity was investigated before and after training in the periods of conditioning and of submaximal competitive fitness in the members of a swimming team of child age and adolescent competitors. The obtained results suggest the possibility that blood viscosity might be regulated by a modification of the parameters of the coagulation system in accordance with the state of physical fitness of child age. In the conditioning period a marked reduction in fibrinolysis, fibrinogen and prothrombin concentration and platelet count was observed along with a decrease of blood viscosity. A training load of the same extent was insufficient to trigger the mentioned regulation mechanism in the state of submaximal physical fitness. Verf.-Referat