Abstract: An exercise apparatus including upper and lower body exercising assemblies which are operable in isolation or in conjunction with each other. The upper body assembly includes rotary handle members which rotate a driving sprocket. The upper driving sprocket in turn rotates an upper driven sprocket which is connected via two additional sprockets and an endless chain to the wheel of the lower body exercising assembly. The lower body assembly is a conventional exercise bicycle including rotary foot pedals for rotating a lower driving sprocket which in turn rotates a lower driven sprocket connected to the wheel. The upper and lower driven sprockets are one-directional ratcheted sprockets which can be rotated only by the endless chain joining them to the upper and lower driving sprockets, respectively, to provide the independent operation of the upper and lower body exercising assemblies.