UTX-Swing is used to support the extension of a knee for a person that has not got enough plantarflexor or quadriceps strength in order to extend the knee. The knee joint is locked during the support phase and it opens in the swing phase. The opening of the knee joint happens when the ankle joint is in dorsiflexion by extending the knee 3 degrees. It is important to choose the users carefully, because the user must have some muscular function left in either the thighs or hips to extend the knee. This orthoses does not correct any malalignments in the lower extremities. The pelottes are on the anterior side of the leg and fastened with velcro bandages. The side bar of the orthosis is on the lateral side of the extremity. The measurements are taken with a specific measuring machine.