Fuente: WIPO "rice" An exercise apparatus is disclosed. The exercise apparatus includes an elongate bar, a rolling member including an outer surface and a centrally-located axial aperture that extends through the rolling member, and at least one pair of apertures disposed within the elongate bar, each aperture of the pair of apertures being configured to receive a locking pin. A distance between the at least one pair of apertures is slightly greater than a length of the centrally-located axial aperture, and at least one pair of apertures is disposed entirely on a right or left side of a midpoint of the elongate bar.