An exercise device capable of simultaneously exercising a plurality of muscle groups, which includes an exercise chair mounted to a base, the exercise chair having a pivotally-resistant seat back. The platform includes a bottom portion and a rear portion and a central axis bisecting the bottom portion and the rear portion. The apparatus may be configured to perform a predefined function in response to the device input signal during normal operation. Pieces of processing instruction information, which are as many as originals having different formats, for performing a check process on predetermined entry items in originals having a predetermined format are beforehand stored. The remaining receiving devices do not receive the one or more optical data signals. The device drivers produce a current through fan coils producing an update in the magnetic field of each motor phase which updates the speed of the fan according to programming within the process controller.