The Sport Rehabilitator® treats Mild to Moderate Knee OA. Polycentric ROM hinges can be used to control knee flexion / extension as needed. The pneumatic air bladders on both sides of the knee joint provide excellent medial, lateral, and rotational control of the knee. Patented Swing Assist eliminates quadriceps avoidance gait and strengthens quadriceps muscles during gait to accelerate recovery. Post injury/ surgery recovery can be accelerated by as much as 50%.