Abstract: Base and pivot blocks, each having a generally triangular transverse cross section, are pivotally mounted at their central apexes by an elongated pivot axle. The pivot block has a flat upper surface having a plurality of outwardly extending mounting rails spaced along opposite side edges. A pair of mounting blocks having cooperating recesses are adjustably mounted on the side edges of the pivot block. A foot support is adjustably secured on each of the mounting blocks. A plurality of coil springs extend between the base and pivot blocks, each of the springs having opposite end portions received in cylindrical recesses in the pivot and base blocks. A hand grip is attached by at least elongated coil spring to an outer side edge of each of the adjustable mounting blocks. In use, an individual stands on the pivot block, with their feet on the foot supports. The user rocks from side to side against the resistance of the springs extending between the pivot and base blocks.