1. An exercise monitor for monitoring the repetitive performance of an exercise, comprising: a switch mountable during use of the exercise monitor to a reciprocally displaceable member of an exercise equipment, the switch being responsive to the reciprocal motion of the displaceable member to output a signal for each of a plurality of sequential exercise repetitions performed by the user on the exercise equipment; processing means for receiving the signals and determining for each a starting address at which a block of corresponding sound data is stored; a memory for storing sound data for each of the plurality of sequential exercise repetitions, the sound data including data representing a voice count number for each repetition of an exercise; and a speech generator for generating a voice in accordance with the sound data stored in the memory, the speech generator being controlled by the processing means in response to the switch to progressively count sequential exercise repetitions performed by the user.