Patent ID: 7621860

Claim:
An exercise sitting apparatus comprising: a seat assembly having an upper side defining a generally planar upper surface adapted to support a user in a seated position and a lower side; a base assembly disposed below the seat assembly and configured to rest upon a floor; a rotation assembly coupled to and disposed between the lower side of the seat assembly and the base assembly, the rotation assembly configured to enable rotation of the seat assembly relative to the base assembly only about an axis of rotation oriented generally perpendicular to the upper surface of the seat assembly; a tension mechanism coupled to the rotation assembly, the tension mechanism having a tension knob configured to provide adjustable frictional resistance endured by the rotation assembly for rotation of the seat assembly about the axis of rotation throughout the rotational range of the seat, controllable by the user; and a hold support coupled to the base assembly to remain stationary relative to the base assembly while the seat assembly rotates such that a user can grasp or otherwise brace oneself with the user's hand or forearm while causing the seat assembly to rotate relative to the base assembly about the axis of rotation.