Abstract: A leg exerciser is for use by a person sitting in a chair. The device is located in front of the chair and the user puts his feet onto two boards which are at an acute angle to the horizontal. A mechanism including a drive motor or flywheel inside the device rocks the boards anti-phase about a horizontal axis lying transverse to the feet between acute angle positions. Sections of the boards lift out of and back into the planes of the boards during each cycle of rocking to lift and lower the user's toes relative to the remainder of the feet so that the feet are subjected to exercise movements similar to walking movements. The exerciser drives the leg blood pump with a view to improving the user's leg circulation.