Abstract: A gait trainer attachment adapted for use with exercise equipment and a method for using the gait trainer attachment. Embodiments of the gait trainer attachment include a frame, a leg brace, and a compromised limb gait system. The compromised limb gait system attaches the leg brace to the frame and is configured to guide a limb of a user through a simulated gait motion. In aspects, the gait trainer attachment gives an amputee user the ability to use ordinary exercise equipment for rehabilitation and endurance training by providing a leg brace for the compromised limb, a frame designed to attach to exercise equipment, and a connection between the leg brace and frame that guides the compromised limb, thus allowing the user to maintain a biomechanically proper walking motion while exercising.