and maintained for the correct period of time referring now to the logic block diagram or flow chart of fig1 the operation of the grc will be described in more detail a preferred embodiment of an electrical circuit for effecting this operation is illustrated in fig1 initially a power source such as a three volt coin type battery 201 such as a commonly available cr2032 is connected to a high performance four bit microcontroller 200 such as model w741c250 available from winbond electronics corporation america 2727 n 1st street san jose calif 95134 the power supplied to the microcontroller 200 remains on at all times until the battery 201 has been exhausted and must be replaced when an on reset button 64 on the grc is depressed power is supplied to the microprocessor 200 and also the infra red detector circuit 67 a liquid crystal display lcd array 210 through which a number appears on the display 63 of the grc and to the light emitting diode led indicator circuit 205 which includes the coaching led 65 on the grc when power is supplied to the grc 60 by depressing the on reset button 64 the grc will have been in either a u201c sleep u201d mode wherein the grc has retained the count of the previously completed exercises or in an initial state wherein the grc will record the number of successfully completed exercises beginning from u201c 0 u201d depression of the on reset button 64 will actuate a keypress counter or reset shutdown timer circuit within the microprocessor 200 to energize a timing circuit so that after a time period the grc will again be placed in a.