Strengthening of the hip and knee muscles in the first week of treatment. A) Straight Leg Raise (SLR) with slight hip extension. Physiotherapist stabilizes the pelvis to avoid compensatory movement; B) Abduction and lateral rotation at 30° of the hip flexion (clam) with resistance elastic around the knee. During the execution of the movement the therapist stabilizes the patient’s pelvis; C) Quadriceps strengthening without weight bearing. Initial position 90° and final position 45° of the knee flexion, such as safe angulation for the patellofemoral joint; D) Squat preventing the knee exceeds the midfoot.