Factors, which influence on speed of motive reaction and speed of protective actions of boxers which are on the stage of base pre-treatment, are examined in the article. It is set on the indicated stage of long-term preparation of boxers: what large mass of parts of body of sportsmen takes part in the certain protective operating and motive reacting on an irritant (signal, attacking the blow of competitor), the greater time is needed on implementation of these motive actions. Excitation of the nervous system of boxers (implementation of the motive operating on a signal) influences on a rev-up their protective actions.