This study will include two groups. The study group will receive mirror-image postural exercise on the 3D postural analysis. The control group will receive a traditional exercise program.

Inclusion Criteria:

• Having chronic mechanical low back pain.
• Having a significant translational and/or rotational deformity of the lumbar spine according to the posture index scale.
• Having normal x-ray

Exclusion Criteria:

• Severe cardiovascular disease.
• Previous spinal surgery.
• Abdominal hernia.
• True leg length discrepancy.
• Severe respiratory disease.
• Pregnancy.
• Associated pathologies of lower limbs that may interfere with the posture such as foot, knee, and hip deformities.

double blind