Abstract: A therapeutic device includes a base, a wall extending upward from the base, and left and right platforms. Additionally, the devices includes a left hinge that rotatably attaches one end of the left platform to the wall, and a right hinge that rotatably attaches one end of the right platform to the wall. One or more left springs that bias the left platform upward relative to the base, and one or more right springs that bias the right platform upward relative to the base. In certain embodiments, the left and right platforms are respectively left and right lower platforms, and the device also includes left and right upper platforms located respectively above the left and right lower platforms, as well as further springs extending between the lower platforms and the upper platforms to bias portions of the upper platforms upward relative to the lower platforms.

Abstract: A therapeutic device includes a base and a platform supported by springs. The platform may be attached to the base by hinges. An upper platform may be rotatably attached to the platform such that it rotates about an axis located above the platforms. The upper platform may be biased by springs between the upper platform and the platform. Handlebars may also be Incorporated into the device. A variety of interchangeable. Springs may be provided to assist in adjusting the therapeutic device.

Abstract: A therapeutic device includes a base and a platform supported by springs. The platform may be attached to the base by hinges. An upper platform may be rotatably attached to the platform such that it rotates about an axis located above the platforms. The upper platform may be biased by springs between the upper platform and the platform. Handlebars may also be Incorporated into the device. A variety of interchangeable. Springs may be provided to assist in adjusting the therapeutic device.