A Knee-Ankle-Foot-Orthoses (KAFO) brace mechanically generates a knee extensor moment and allows for a flexed knee during STS, allowing for reduced upper body demand to be placed on the patient. An orthosis comprises a femoral brace and a tibial brace connected together with a pivot to form a knee joint between the femoral brace and the tibial brace, and a knee extension moment generator at the knee joint. Also, a foot brace may be connected to the tibial brace to form an ankle joint with an ankle plantar flexion moment generator disposed about the ankle joint.
