Abstract

A review concerning the morphology of microvascular bed and modifications occurring during training in endurance athletes is offered. The capillary density is decisely higher in athletes, compared with sedentary men, around fibres with high oxidative activity. It is also higher in sedentary men submitted to a training period. The parameters capillary density and capillaryfibres ratio rise till the typical value of athletes. Training can also improve the area of exchange capillary-fibers: the average diffusion distance of oxygen becomes shorter and its transfer of fibres quicker. It is also reported the necessary time for such adjustment, relating the V02max and oxidative activity. The modalities such modifications are also pointed out. Verf.-Referat