is recorded and visually indicated to the user to evaluate speed and to provide an indication for improvement as well as adding to the enjoyment of the exerciser and or players of the game if used as an amusement device it is readily understood that the quicker the bag is struck greater will be the aerobic effect achieved by the user the above described programs are examples of only several of the types of workouts which can be incorporated into control circuitry of circuit board 37 numerous other sequences or programs can be provided by inserting various control chips into the circuit board as can be seen in fig1 the structure and manner of use of a usual speed bag is not changed thereby enabling the boxer and or exerciser to strike the bag in a similar manner prior to incorporating the novel control circuitry therein a further modification of the present invention is shown in fig7 wherein the platform 8 is still provided with three contact zones 60 61 and 62 each of which has a plurality of detection locations 65 such as lasers embedded or projecting through disc 8 which are operatively connected to control circuit 37 this system also provides an audio sound or beep.