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A precessional gyroscopic exercise device includes a housing containing a tiltable rotor assembly. The housing and the rotor assembly may be coupled together by a tilt assembly that defines a fixed precession axis for the rotor assembly and allows the rotor assembly to be tilted relative to the fixe

A precessional gyroscopic exercise device includes a housing containing a tiltable rotor assembly. The housing and the rotor assembly may be coupled together by a tilt assembly that defines a fixed precession axis for the rotor assembly and allows the rotor assembly to be tilted relative to the fixed precession axis. When the rotor is spinning, and the rotor assembly is tilted contact between the spinning axle and the interior surfaces of a circumferential channel in the housing causes the rotor assembly to rotate about the fixed precession axis, producing a gyroscopic precessional torque--this torque, and resultant wobbling of the device, is opposed by the user for the exercise effect. The tilting mechanism may be associated with handles on the outside of the device, allowing the user to selectively control the tilting of the rotor assembly. The handles may be rotatably coupled to the device, permitting operation of the device using a pedaling motion. The handles are preferably located on the device on or near the precession axis. An alternate embodiment of the device has no tilting assembly or channel, and the spin and/or precession of the rotor assembly is motor-driven.

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1. An apparatus comprising: a housing having a precession axis; a rotor assembly comprising a rotor and an axle, the axle having a longitudinal axis defining a spin axis for the rotor; and first and second handles, each handle being movably coupled to the housing; wherein the rotor is rotatabl

1. An apparatus comprising: a housing having a precession axis; a rotor assembly comprising a rotor and an axle, the axle having a longitudinal axis defining a spin axis for the rotor; and first and second handles, each handle being movably coupled to the housing; wherein the rotor is rotatable relative to the housing about the spin axis and the rotor assembly is rotatable relative to the housing about the precession axis. 2. The apparatus of claim 1, wherein the movable coupling of the handles to the housing is a rotational coupling, each handle having an associated crank axis, each handle being rotatable, about its crank axis, relative to the housing. 3. The apparatus of claim 2, wherein each handle is moveable in a circular path in a plane substantially perpendicular to its crank axis, and wherein each handle remains in substantially the same orientation during its motion in the circular path. 4. The apparatus of claim 3, wherein the crank axes of the first and second handles are substantially parallel. 5. The apparatus of claim 4, wherein the crank axes of the first and second handles are offset from each other. 6. The apparatus of claim 5, wherein the motion of the first and second handles in their circular paths contributes to the rotation of the rotor assembly about the precession axis. 7. The apparatus of claim 1, wherein the handles are located on or near the precession axis. 8. An apparatus comprising: a housing having a precession axis; a rotor assembly comprising a rotor and an axle, the axle having a longitudinal axis defining a spin axis for the rotor; a precession plane substantially perpendicular to the precession axis; and first and second handles coupled to housing, offset from the precession plane; wherein the rotor is rotatable relative to the housing about the spin axis, and the rotor assembly is rotatable relative to the housing about the precession axis. 9. The apparatus of claim 8, wherein the handles are rigidly coupled to the housing. 10. The apparatus of claim 8, wherein the handles are movably coupled to the housing. 11. The apparatus of claim 10, wherein the movable coupling of the handles to the housing is a universal joint. 12. The apparatus of claim 10, wherein the movable coupling of the handles to the housing is a rotational coupling, each handle having an associated crank axis, each handle being rotatable, about its crank axis, relative to the housing. 13. The apparatus of claim 12, wherein each handle is movable in a circular path in a plane substantially perpendicular to its crank axis, and wherein each handle remains in substantially the same orientation during its motion in the circular path. 14. The apparatus of claim 12, wherein the crank axes of the first and second handles are substantially parallel. 15. The apparatus of claim 12, wherein the crank axes of the first and second handles are offset from each other. 16. The apparatus of claim 13, wherein the motion of the first and second handles in their circular paths contributes to the rotation of the rotor assembly about the precession axis. 17. The apparatus of claim 8, wherein the handles are located along or near the precession axis. 18. The apparatus of claim 1, wherein the handles are offset from the precession plane. 19. The apparatus of claim 1, wherein the movable coupling of the handles to the housing is a universal joint.