An exercise apparatus including: a pair of platforms, each of the pair of platforms having: a base including a lower surface and a pair of opposed flanges extending upwardly from the lower surface; roller units received side-by-side in the base and being independently rotatable, each of the roller units extending between the pair of opposed flanges of the base and including at least two roller bodies spaced from one another by a groove, each of the at least two roller bodies including an outer surface, at least a portion of the outer surface being in continuous contact with the lower surface of the base; a retainer coupled to the base for maintaining the rollers units on the base; and a connector for coupling the pair of platforms to one another to provide a surface for sliding.