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[Hemorheological changes during exercise].

It is now necessary to study the macro- and microcirculatory modifications of the organism following the stress. We have devoted our attention to the hemorheological parameters, which have been evaluated in a group of ten sedentary subjects, of fourteen athletes under twenty years of age, and of ten subjects whose age was over thirty, who carry on physical unbroken performance. We have evaluated the modifications of total blood viscosity and of red blood cell deformability after an ergometric test. Our results show that the hemorheological pattern gets worse after strenuous muscular exercise; moreover, the advancing age gets worse the hyperviscosity response. The pathophysiological mechanism which causes the hemorheological disorder is yet unknown, so it is clear the importance of studying the hemorheological balance in order to clarify the pathophysiology of stressed muscular function.