Role of ribose deficit in rat testicular metabolism under conditions of overtraining.

Acute disorders of purine metabolism develop in rat testes under conditions of overtraining. These disorders are characterized by enhanced catabolism and reduced reutilization of purine mononucleotides and activation of lipid peroxidation of membrane structures against the background of reduced activities of the pentose cycle and antioxidant system. Administration of D-ribose to rats subjected to overtraining improves purine reutilization, stimulates the pentose cycle work, inhibits lipid peroxidation in membrane structures of the testes, and saves the testicular incretory function.