A knee brace having anterior and posterior sides divided by an anterior-posterior plane, and lateral and medial sides divided by a lateral-medial plane generally perpendicular to the anterior-posterior plane, the brace adapted for placement over at least a posterior side of a leg, the brace comprising: a first posterior frame member having front and rear surfaces, and including a first end portion, a central portion connecting to the first end portion, and a second end portion defined by at least one arm (120, 122) branching from the central portion; a second posterior frame member connected to the first frame member, the second posterior frame member having front and rear surfaces, and including a first end portion connected to the first end portion of the first frame member, a central portion connecting to the first end portion, and a second end portion defined by at least one arm (126, 128) branching from the central portion; and a posterior resilient hinge device connecting the first and second frame members (102, 104), and located at or near the first end portion of the first frame member, the hinge device located along the lateral-medial plane on the posterior side of the brace, the hinge device arranged to urge the first and second frame members (102, 104) into a predetermined alignment; the hinge device comprises a hinge defined by first and second hinge elements (142, 144) connected to one another with a pivotable joint, characterized in that the first and second hinge elements (142, 144) cooperate with a cantilever spring that restrains movement of the first and second hinge elements (142, 144) so that they are generally pivotable relative to each other thereby enabling them to pivot from a parallel and axially aligned position towards a direction away from the first and second frame members (102, 104). a first posterior frame member having front and rear surfaces, and including a first end portion, a central portion connecting to the first end portion, and a second end portion defined by at least one arm (120, 122) branching from the central portion; a second posterior frame member connected to the first frame member, the second posterior frame member having front and rear surfaces, and including a first end portion connected to the first end portion of the first frame member, a central portion connecting to the first end portion, and a second end portion defined by at least one arm (126, 128) branching from the central portion; and a posterior resilient hinge device connecting the first and second frame members (102, 104), and located at or near the first end portion of the first frame member, the hinge device located along the lateral-medial plane on the posterior side of the brace, the hinge device arranged to urge the first and second frame members (102, 104) into a predetermined alignment; the hinge device comprises a hinge defined by first and second hinge elements (142, 144) connected to one another with a pivotable joint, characterized in that the first and second hinge elements (142, 144) cooperate with a cantilever spring that restrains movement of the first and second hinge elements (142, 144) so that they are generally pivotable relative to each other thereby enabling them to pivot from a parallel and axially aligned position towards a direction away from the first and second frame members (102, 104).