Adaptation of lymphoid organs during recovery after physical exercises

The peripheral lymphoid organs of white rats adapting to physical loads in the recovery period after the termination of loads were studied. The results were compared with the data of the authors who studied the thymus during recovery from physical exertion. It was found that adaptive reactions in the central and peripheral lymphoid organs are unidirectional. 2 weeks after the termination of the loads, structural and functional inferiority of lymphoid organs, more pronounced in the lymph nodes, is revealed. In the organs, there are involutional changes, inhibition of lymphopoiesis and destruction of lymphoid cells. In the same period is determined by the violation of the permeability of blood vessels in the lymphoid organs. Against the background of lymphocytopenia, restorative reactions occur, which begin at the second week of the recovery period. After 4 weeks after the termination of physical activity, there is a noticeable restoration of the structure and function of lymphoid organs, but a complete restoration of the cellular composition of the lymph nodes does not yet occur. Structural and functional inferiority of lymphoid organs is accompanied by compensatory reactions, which are manifested in an increase in the content of tissue basophils in the lymph nodes and persist throughout the period of observation.