The present specification discloses an exercise system comprising a stable support purchase, such as a ballet barre, and an unstable support apparatus, such as a ball or a roller, wherein an individual may support a limb on the unstable support apparatus and selectively contact the stable support purchase for balance while performing an exercise, such as a ballet position, and an associated method comprising the steps of positioning at least one limb on the unstable support apparatus and simultaneously performing the exercise.

One or more aspects comprise an apparatus comprising: (a) a base component comprising a flat lower surface and a concave upper surface having a first curvature; and (b) a handle component comprising a convex lower surface having a second curvature; wherein the first curvature and the second curvature conform sufficiently to allow the handle component to rotate three-dimensionally within the base component, and wherein at least one of the concave upper surface and the convex lower surface comprises means to allow the handle component to rotate three-dimensionally within the base component. Other aspects and embodiments, including methods of use and manufacture, will be apparent to those skilled in the art after reviewing the description and drawings provided herein.

Apparatuses and methods are presented herein for an exercise apparatus that functions as a floor slider and balance disc. The apparatus comprises a disc comprising a convex side and a flat side. The disc is coupled to a foam annulus that is removably attached to the flat side of the disc. The foam annulus comprises a side surface between a radially inner surface and a radially outer surface. At least one coupling element arranged on the side surface of the foam annulus. At least one complementary coupling element arranged on the flat side of the disc comprises and configured to interface with the at least one coupling element on the side surface of the foam annulus.

The multi-modal portable exercise equipment of the present invention includes matable first and second generally hemispheric exercise half bodies that in mated condition provide a generally spherical exercise ball that in one exercise modality of the multi-modal portable exercise equipment of the present invention is attached to external exercise equipment such as the cable of an exercise machine or resistance band and can be used by a subject for strength and other allied training exercises and that in another exercise modality thereof the first and second generally hemispheric exercise half bodies in unmated condition each provide a freestanding generally hemispheric exercise half body and can be used by a subject for balance and other allied training exercises. The first and second generally hemispheric exercise half bodies in unmated condition are each constituted of a plurality of spherical caps in nested relation that may be unpacked and used by a subject for balance and other allied training exercises of low, medium and high use difficulty.

The present invention is a modular multi-axis balance trainer that includes a substantially flat deck forming a top portion having a substantially rigid member for stepping. A rigid bottom member is arranged beneath the substantially flat deck. The rigid bottom member is substantially dome-shaped and is configured to be placed on a surface. The rigid bottom member is configured to induce rotational instability on a user stepping on the substantially flat deck to challenge a balance of the user. The modular multi-axis balance trainer also includes a transversely extending opening that allows an insertion of a foot strap, securing the user during dynamic balance exercises. Additional features of the modular multi-axis balance trainer include thermoplastic polyurethane construction for the deck and dome structures, resilience to deformation, and multi-axial rotations enabled by the dome shape.