Apparatus for isolated, closed chain exercise of a person's quadriceps muscles

摘要

An exercise machine includes a frame designed to rest upon a floor surface; a back rest mounted on the frame; and a foot platform mounted on the frame. At least one of the foot platform and the back rest is pivotally mounted on the frame in such a manner that a person may rest his back against the back rest and exercise his quadriceps muscles in isolated, closed chain fashion. A resistance device is preferably provided to resist movement of the back rest and/or the foot platform in a manner that opposes the user's efforts to straighten his legs at the knees.