An exercise apparatus comprises: a frame; a crank system comprising first and second crank coupling locations, the crank system being supported by the frame; a right foot support member comprising a first right guide element; a left foot support member comprising a first left guide element; a right movable member comprising a second right guide element; a left movable member comprising a second left guide element; a first flexible support system comprising a first flexible element, the first flexible element coupled to the frame and the first and second right guide elements and operative to move the first crank coupling location when the right foot support member moves; and a second flexible support system comprising a second flexible element, the second flexible element coupled to the frame and the first and second left guide elements and operative to move the second crank coupling location when the left foot support member moves.