Abstract: An apparatus includes a first elongate track and a second elongate track that are each substantially straight and adjustably coupled to a base member such that each track is configured to extend away from the base member in the opposite direction relative to the other track. The apparatus also includes a first handle slidably coupled to the first elongate track such that the first handle is movable along the length of the first elongate track and a second handle slidably coupled to the second elongate track such that the second handle is movable along the length of the second elongate track.