Patent ID: 7566291

Claim:
A balance training device for a user to maneuver by balancing the user's weight on the device, the device comprising a board and consisting of only one substantially spherical balancing insert, the balancing insert having a circumference, the board comprising a central longitudinal axis, a central lateral axis, an upper surface defining an upper surface area and a lower surface defining a lower surface area, wherein the lower surface comprises a concave region extending into the board from the lower surface toward the upper surface whereby the apex of the concave region is disposed between the lower surface and the upper surface, and the concave region is positioned off center with respect to the lateral axis and centrally positioned with respect to the longitudinal axis, the concave region adapted to receive the balancing insert, whereby the board rides over the balancing insert, and wherein the concave region encompasses an area within the lower surface greater than an area defined by the circumference of the balancing insert the entire upper surface area is substantially flat and smooth and adapted to support the user during use, and the area encompassed by the concave region is less than the entire upper surface area.