Abstract: A device for exercising leg muscles. The device includes a seat and backrest arrangement mounted near the bottom end of an upright suspended frame. The opposite upper end of the frame is mounted to a support for free pivotal movement about a horizontal axis. Overall weight of the entire unit can be varied by adding to or removing weights from a bar below the seat. Resistance to pivotal movement is thereby selectively varied. Legs are exercised by a user seated at the device thrusting rearwardly with his or her legs against a stationary surface. Repeated thrusting leg motions cause a pendulum motion resisted by the overall unit weight. At an extreme outward end of the motion, the user's legs may leave contact with the stationary surface and can relax until the unit pivots back to the start position.