An exercise device is disclosed. The exercise device includes a first portion and a second portion. The first portion includes a first substantially planar surface and is configured to support a portion of a patient. The second portion includes a second substantially planar surface and is configured to support a portion of a patient. The second substantially planar surface is oppositely disposed of the first substantially planar surface. The first substantially planar surface includes a diameter, and the second substantially planar surface includes a diameter. The diameter of the first substantially planar surface is smaller than the diameter of the second substantially planar surface.