Patent ID: 6261213
Filing Date: 2001-07-17
Classification: A63B

Abstract:
An isotonic exercise apparatus for exercising muscles of the lumbar-pelvic region of the body, said apparatus comprising:a) a mounting plate means adapted to be supported by a back rest of a seat, said mounting plate means including a race on a surface thereof and extending downwardly from an upper end of said mounting plate means;b) a flexible sheet member having a first end, a second end and a central portion between said first end and said second end, said first end coupled to said mounting plate means, said second end extending to and riding on said race, freely, and said central portion defining a flexible curvature arching away from said surface of said mounting plate means; andc) a resilient bias means coupled to said mounting plate means, said resilient bias means including a head means and a resilient spring means, said head means in contact with said central portion for transferring resilient force between said resilient spring means and said flexible sheet member and for driving said central portion into a convex geometry for resiliently resisting pressure.