Abstract: A displaceable seat exercise system (10) is provided wherein a user's legs and arms may be independently exercised. A seat assembly (40) is rotatively coupled to a base frame (12) by means of a parallelogram linkage assembly (90). The user displaces seat assembly (40) by extending his or her legs against a stationary foot support assembly (80), the foot support assembly being affixed to the base frame (12). Seat assembly (40) carries an arm member support assembly (50) which includes a pair of rotary resistance assemblies (120, 130) and respective rotatively coupled arm members (64, 62) for rotation by each of the user's arms, respectively. Seat assembly (40) may be collapsed into juxtaposition over base frame (40) and partially overlaid by the foot platform (88) to releasably secure exercise system (10) in a compact storage configuration.