[Content and utilization of testosterone in the cardiac and skeletal muscles of male rats during physical exercise].

They influenced differently the content, transport and utilization of testosterone (T) in the body. The strength training resulted in a 2.5-3-fold increase of the T-content and binding capacity of blood proteins as compared with untrained animals, and a 1.5-2.0-fold increase of these characteristics as compared with untrained animals. As a result of PE 3H-T incorporation in 10 investigated tissues and organs including muscles increased 2-fold. A pharmacokinetic study showed that androgen half-life in the body increased from 1 h 35 min to 2 h 16 min under PE. The training did not change the T content in the active skeletal and heart muscles. The T and androgen receptor content in the muscle cytosol did not change after training.