Many patients with genu valgum present with postural changes, such as: internal rotation of the tibial and femoral axes, anteversion of the iliac bones, increased lumbar lordosis, thoracic hyperkyphosis and cervical hyperlordosis. Such pathomechanical changes may interfere with lumbar range of motion. Investigators of this study try to answer the following question: is there a relationship between sacral angle and lumbar range of motion in women with bilateral genu valgum. the results of this study will help professionals to plan a proper treatment program for patients with genu valgum.

Sixty four female participants were under the following procedures:

• Screening for genu valgum via postural assessment from frontal view, then measuring the Q angle bilaterally.
• Patients with Q-angle >20 degress were under the following procedures:

A. Full-Length AP standing X-ray,then the investigators measured the hip-knee angle (the angle between the mechanical axis of the femur and the tibia). It will be obtained by connecting the center of the femoral head to the midpoint of the tibial eminential spine in a line tangential to the femoral condyles, and another line from here to the centre of the trochlea tali.

B-Lumbo-sacral X-ray lateral view was done at the time and the sacral angle was the measured by Ferguson´s technique in degrees using a protractor and this was the sacral angle.

C- During the same session, trunk range of motion was measured by Modified schober test D- Collected data were taken for statistical analysis.

Inclusion Criteria:

1. Female with bilateral genu valgum (Q angle> 20 degrees.
2. Age ranges from 18-25 years old.
3. BMI ≥ 30 (kg/m2)

Exclusion Criteria:

1. Previous lumbar surgery
2. lumbar spine fracture
3. Spondylolisthesis
4. Foraminal or extra foraminal lumbar disc herniation
5. spinal tumors, and bone metabolic diseases 6 - Knee surgeries

Female with bilateral genu valgum with age range 18-25 and BMI≥ 30 (kg/m2)