[Crural blood circulation in changed position of the legs and after preventive gymnastics].

Investigations of arterial and venous circulation in the shin, analysis of work hyperemia and venous pump mechanisms have shown, that regional hemodynamics depends on the position of the lower limbs. The optimal initial position for special exercises intensifying the venous outflow is sitting with raised, slightly flexed legs, with the shin on the level of the heart. Sitting with flexed knees and vertical shin is less advisable for prophylaxis.