An exercise arrangement for use on a support surface, comprising: a user support and input arrangement that is configured to support a user and that includes a user force input arrangement, wherein application of forces by the user during operation of the user force input arrangement includes application of forces in a first axial direction that is generally parallel to the support surface and application of forces in a second direction that is non-parallel to the first direction; a movable support arrangement interposed between the support surface and the user support and input arrangement, wherein the movable support arrangement is movable in the first axial direction in response to the application of forces by the user in the first axial direction during operation of the user force input arrangement and is simultaneously movable in the second direction in response to the application of forces by the user in the second direction during operation of the user force input arrangement, characterised in that the movable support arrangement comprises a platform that is movably mounted to a base , wherein the user support and input arrangement is supported on the platform; and a roller and track arrangement that is interposed between the platform and the base, wherein the roller and track arrangement comprises one or more arcuate track engagement surfaces that extends in an axial direction and provide a gravity bias of the platform toward an axially neutral position and wherein the roller and track arrangement provides movement of the platform in the axial direction relative to the base in response to forces applied by the user to the user force input arrangement. a user support and input arrangement that is configured to support a user and that includes a user force input arrangement, wherein application of forces by the user during operation of the user force input arrangement includes application of forces in a first axial direction that is generally parallel to the support surface and application of forces in a second direction that is non-parallel to the first direction; a movable support arrangement interposed between the support surface and the user support and input arrangement, wherein the movable support arrangement is movable in the first axial direction in response to the application of forces by the user in the first axial direction during operation of the user force input arrangement and is simultaneously movable in the second direction in response to the application of forces by the user in the second direction during operation of the user force input arrangement, characterised in that the movable support arrangement comprises a platform that is movably mounted to a base , wherein the user support and input arrangement is supported on the platform; and a roller and track arrangement that is interposed between the platform and the base, wherein the roller and track arrangement comprises one or more arcuate track engagement surfaces that extends in an axial direction and provide a gravity bias of the platform toward an axially neutral position and wherein the roller and track arrangement provides movement of the platform in the axial direction relative to the base in response to forces applied by the user to the user force input arrangement. <EOS>