In experiments on young rats-females it has been established that chronic introduction of testosterone-propionate into an animal organism has been accompanied by initial (5–15 injections later) facilitating effect on synaptic transfer and also increasing of maximal achievement amplitude of muscular contraction, shortening of the duration of the solitary contraction and all its phases, lengthening of achievement of muscle’s maximal amplitude and increasing of the frequency of the muscle’s tetanization, which have been remained in process of the further introduction of testosterone in an organism.
