A double upright knee brace for treating knee flexion contracture includes upper and lower sections, each section having a pair of leg members and an anteriorly disposed integral thigh and shin cuff. A pair of hinges is intermediately positioned to the upper and lower sections. Notches formed in the upper and lower sections provide a catch for a pair of elastic bands, one each deployed on opposed sides of the knee brace, which provide a gait swing assist mechanism for the brace. A multitude of adjustable straps are deployed on both the anterior and posterior sides of the brace. A pair of air bladders, one deployed posteriorly below the knee and one deployed anteriorly above the knee, provide posterior-anterior mobilization when a patient wears the brace, stands up and ambulates. A pair of inner air bladders mounted on inner surfaces of the hinges stabilizes the knee joint.
