[Quantitative changes in myoneural synapses and capillaries under the influence of physical stress].

Experiments conducted on young male rats showed that dosaged muscular training with its gradual increase in the course of one month, promoted an increase in the area of both the neuro-muscular synapses and metabolic surface of capillaries in the region occupied by them. These quantitative changes are the morphological equivalent of increasing the activity of the neuro-muscular apparatus in physical exertion.