Abstract: Exercise method and apparatus activated air compressor driven by a pedal and crank exercise machine which is used for supplying kinetic energy to drive an air compressor. The compressed air is stored in a series of compressed air bottles similar to those used in scuba diving, the compressor being connected to the air storage bottles in sequentially switched fashion as each bottle reaches a desired predetermined pressure. The kinetic energy thus stored in the bottles in the form of high pressure air is released at a controlled rate to drive a turbine, for example, or any form of the air motor, which may then in turn drive any electrical generator, or supply a source of rotary power for any use.