Patent ID: 6843759

Claim:
An exercise device comprising: a seat on which, in use of the device in exercising of the abdominal muscles of a user, a user is seated; a bowed back support member disposed adjacent to the seat and resenting a convex curved surface against which the back and head of the user rest in a backwardly reclining posture in one stage of said use; a belt adapted to fit around the waist of the user during said use; restraining means mounted on the device and adapted to engage part of the body of the user during movement of the user from said backwardly reclining posture wherein the back of the user rests against said convex curved surface to sitting position, so as to increase the force that must be exerted by the abdominal muscles of the user in carrying out said movement; and a platform member having a forward portion defining said seat and a rearward portion on which said back support member is mounted; and a platform support member elevating the forward end of the platform member such that the platform member forms an acute angle with a supporting surface for the device.