Resilient exercise board

A portable, stand alone exercise board, comprising a generally rectangular, substantially rigid platform having an upper surface of sufficient lateral extent to receive a person who is exercising, a plurality of feet positioned toward corners of the platform on the under side of the platform and engagable with a supporting surface, and a pair of arched bars of resilient spring material extending between the feet along opposing side margins of the platform and imparting an upwardly convex contour to the platform while permitting the platform to flex with a resilient action in response to the weight of a person who is exercising on the board, the bars and the platform being formed as a unitary one-piece structure.

A portable, stand alone exercise board, comprising a generally rectangular, substantially rigid platform having an upper surface of sufficient lateral extent to receive a person who is exercising, a plurality of feet positioned toward corners of the platform on the under side of the platform and engagable with a supporting surface, and a pair of arched bars of resilient spring material extending between the feet along opposing side margins of the platform and imparting an upwardly convex contour to the platform while permitting the platform to flex with a resilient action in response to the weight of a person who is exercising on the board, the bars and the feet being formed as a unitary one-piece structure.

An exercise board, comprising a platform of fiber reinforced plastic formed with an upwardly convex arch and an upper surface of sufficient lateral extent to receive a person who is exercising, and a plurality of feet on the under side of the platform and engagable with a supporting surface, the fiber reinforced plastic permitting the platform to flex with a resilient action in response to the weight of a person who is exercising on the board, the platform comprising a honeycomb core having vertically extending cells, fibrous strands extending horizontally above and below the core, and a resinous binder material enveloping the strands and filling the cells in the core to form a unitary solid structure.

An exercise board, comprising a platform of fiber reinforced plastic formed with an upwardly convex arch and an upper surface of sufficient lateral extent to receive a person who is exercising, and a plurality of feet on the under side of the platform and engagable with a supporting surface, the fiber reinforced plastic permitting the platform to flex with a resilient action in response to the weight of a person who is exercising on the board, the platform being a laminated structure comprising a base layer of resinous mat reinforced with polyester strands, a honeycomb core overlying the base layer and having vertically extending cells, a layer of bidirectional woven roven overlying the core, and a plastic resin filling the cells and bonding the mat, core and roven together to form a unitary solid structure.

An exercise board, comprising a platform of fiber reinforced plastic formed with an upwardly convex arch and an upper surface of sufficient lateral extent to receive a person who is exercising, and a plurality of feet on the under side of the platform and engagable with a supporting surface, the fiber reinforced plastic permitting the platform to flex with a resilient action in response to the weight of a person who is exercising on the board, the platform being generally rectangular and having cornerpieces formed as an integral part thereof with downwardly extending flanges defining recessed areas in which upper portions of the feet are received.