Abstract: A weight plate for use with a barbell type exercise device wherein the plate is coupled to the apparatus' lifting bar for rotation during the exercise movement, which rotation is ultimately blocked by a leverage bar coupled to the plate for rotation therewith and positioned to contact the user's outer forearm during the exercise movement.The plate includes protrusions and recesses on its front and rear faces for interengaging adjacently mounted plates on the apparatus so that the plates rotate together without the need for the leverage bar to penetrate all plates.

Abstract: An exercise device comprising a pair of weight plates (10) is disclosed which can be mounted for rotation about a lifting bar (22) with the plates' centers of gravity below the lifting bar. A leverage control bar, coupled to the plates for rotation therewith, is positioned to contact the users forearm during a portion of the curling movement, thereby limiting the rotation of the plates and maintaining the plates' centers of gravity in a lagging position with respect to the user's hands so as to exert relatively constant resistance during the movement.