Method and apparatus for enhancing operation of leg prothesis

A method comprising:

• attaching a first end of a cable to a front portion of a leg prosthesis worn by a subject and moved through a plurality of gait phases, wherein the front portion of the leg prothesis faces a front side of a subject wearing the leg prothesis;
• attaching a module to a post secured to the leg prothesis, wherein the module comprises a tension spring, a gear movably coupled to the tension spring, and a locking mechanism;
• engaging a second end of the cable with the gear and tension spring of the module to maintain tension in the cable, wherein the second end of the cable is opposite to the first end of the cable;
• fixing, with the locking mechanism, a position of the gear and tension spring to maintain a length of the cable defined between the module and the front portion of the leg prosthesis during a first gait phase of the plurality of gait phases;
• and
• releasing, with the locking mechanism, the position of the gear and tension spring to vary the length of the cable during a second gait phase of the plurality of gait phases and generate propulsion along a direction of travel of the subject during the at least one second gait phase, said releasing step comprising increasing the length of the cable for the second gait phase comprising a toe off gait phase during plantarflexion.