Patent ID: 6692419
Filing Date: 2004-02-17
Classification: A63B

Abstract:
An exerciser comprising:a base; and a rocking plate rotatably attached to the base with a ball joint, said rocking plate having a top and a bottom; wherein the ball joint comprises a ball rotatably attached to the bottom of the rocking plate, and a post with a bottom mounted on the ball and secured to the base; and wherein a protrusion with a bottom is formed on the bottom of the rocking plate; a first recess is defined in the bottom of the protrusion to receive a top part of the ball; and a collar is attached to the protrusion for the post to extend through the collar and has a second recess defined in the collar to receive a bottom part of the ball, whereby a user's body can be twisted or swung, or ankles rotated when the user steps on the rocking plate to keep balance.