Presynaptic Inhibition of Spinal Alpha-motoneurons in Athletes Adapted to Different Muscle Activity

Changes in the presynaptic inhibition of spinal alpha-motoneurons were studied in athletes during motor activities of different types. In the state where muscles were at relative rest, the presynaptic inhibition of spinal alpha-motoneurons of the m. soleus was stronger in muscle samboists (athletes specializing in the martial art of sambo) and sprinters than in long-distance runners. In samboists performing repeated static loads, the presynaptic inhibition of spinal alpha-motoneurons became stronger from one trial to the next. Both technique training and strength training enhanced the presynaptic inhibition of spinal alpha-motoneurons, this enhancement being greater after strength training.