A device for monitoring and comparing present, past and ideal performances on an exercise machine senses a preselected set of factors chosen to represent the present performance of the user on the machine. A Central Processing Unit operates under a predetermined set of user controlled instructions to store the set of performance data for each performance of the user in its memory unit, and compare the present set against a stored user selected set of performance data representing a selected performance. It generates an output display signal representative of a user selected comparison metric therebetween.
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