Abstract: An exercise apparatus having a plurality of upper and lower interchangeable surfaces. The apparatus includes a plurality of interchangeable upper surfaces sized and shaped to fit on an upper side of the fitness platform and a plurality of interchangeable lower surfaces sized and shaped to fit on a lower side of the fitness platform. A user selects one of the plurality of interchangeable upper surface and affixes the selected upper surface to the upper side of the fitness platform and selects one of the plurality of interchangeable lower surfaces and affixes the selected lower surface to the lower side of the fitness platform. The upper surfaces may include an incline surface, a flat upper surface, and a cushion surface. The lower surfaces may include a stable base, an unstable base, and a surface having a plurality of pivotable wheels. The user selects the upper and lower surfaces for the desired exercise.