초록 ▼

A rigid surface upon which a person sits is elastically supported, preferably by a gas-filled bladder assembly which includes two inflatable bladders, one circumscribing the other. The bladders are preferably independently inflated, the inner bladder preferably being inflated to a higher pressure th

A rigid surface upon which a person sits is elastically supported, preferably by a gas-filled bladder assembly which includes two inflatable bladders, one circumscribing the other. The bladders are preferably independently inflated, the inner bladder preferably being inflated to a higher pressure than the outer bladder to act as a fulcrum for the seating surface. The bladder assembly allows two degrees of movement for the seating surface, e.g., pitch and roll rotations about two mutually orthogonal medians. The two degrees of movement permits a user to exercise his or her lumbar cage muscles by seesaw movement of the lower body on the seating surface.

대표청구항 ▼

1. A device for exercising the lumbar region of a person seated upon it, the device comprising:(a) a rigid surface upon which the person sits upright; (b) means for elastically supporting the surface, said means allowing the surface to be rotated around two mutually orthogonal medians of the surface

1. A device for exercising the lumbar region of a person seated upon it, the device comprising:(a) a rigid surface upon which the person sits upright; (b) means for elastically supporting the surface, said means allowing the surface to be rotated around two mutually orthogonal medians of the surface by selected movement of the person's lower body.