Abstract: An exerciser is provided for exercising the leg anterior muscles of a person and includes a forwardly facing seat upon which the person may be seated. A weight arm includes an upper rear end portion mounted for oscillation about a horizontal transverse axis which may be adjusted in elevation relative to the seat and the weight arm rear upper end portion includes a first upwardly facing abutment surface for engagement by the underside of the heel portions of the exerciser as well as a second downwardly facing abutment surface for engagement by the upper forward portions of the exerciser's feet. The forward end of the weight arm includes structure for supporting a variable amount of weight therefrom and the axis of oscillation of the weight arm is disposed closely adjacent the first upwardly facing abutment surface.