Abstract: A foldable exercise device including a board member having a planar top surface for supporting the user in any of several exercising positions; first and second rollers for runningly ridably supporting the board member in a horizontal disposition; structure for dividing and separating the board member into first and second end members; and hinge structure for hingably joining the first and second end members of the board member together and for allowing the board member to be folded between an opened position and a closed position.

Abstract: A device for exercising particular muscles of a user as he selectively accomplishes various exercises in conjunction therewith. The device is characterized by an oblong board member having a size to comfortably support the user's torso and head. The board may be used in several different modes or manners, one of which involves roller apparatus which facilitates traveling the board to-and-fro while in a horizontal disposition. In this mode, track structure is utilized in conjunction with the roller apparatus. In another mode, the board is supported in an inclined stationary fashion to provide, in one instance, an "abdominal board" and in another instance a "slant board". The roller apparatus is made use of in this latter mode to constitute a pair of legs for supporting the elevated end of the board. Other structure which serves a dual function is utilized in reconfiguring the device for compatibility with the performance of many different exercises.