Abstract: Apparatus is disclosed for measuring an athlete's auditory reaction time, and for training an athlete to reduce his auditory reaction time in response to an auditory stimulus used to initiate an athletic event. The apparatus automatically provides a sequence of variable time delays followed by auditory stimuli which stimulates the sequence and auditory quality of the preparatory commands used to initiate an athletic event. The apparatus further provides means for measuring and indicating the athlete's auditory reaction time in response to the auditory stimulus which represents the "Go" signal of the athletic event.