2. After 81-day castration of young male rats the weight of the sоleus and plantaris was reduced and hypertrophy following tenotomy of the gastrocneumius muscle did not develop.
3. Chronically castrated rats received testosterone two weeks prior to tenotomy of the gastrocnemius and a week during the muscle hypertrophy phase. Hypertrophy of the soleus in castrated rats which had received testosterone seven days after tenotomy of the gastrocnemius was 25% as compared with muscles of castrated animals. The corresponding value in the plantaris muscle was 10%. 4. These results indicate that even calf muscles of the rat, namely the soleus and plantaris muscles, are significantly affected by testosterone under these conditions, although it is not, as yet, clear whether its action is direct or indirect.
>>Размер компенсаторной гипертрофии напрямую зависит от гормонального статуса тела. У кастратов не растёт ничего. Тестостерон решает!