This observational study aims to investigate the impact of pelvic asymmetry on hip joint proprioception in patients with lumbar radiculopathy. Proprioception, or the body's sense of joint position and movement, plays an essential role in posture and stability. People with lumbar radiculopathy often suffer from back and leg pain and may experience changes in posture and balance. This study aims to examine the relationship between pelvic asymmetry, hip joint proprioception and low back pain which may help improve physical therapy approaches for such patients.

In this study, participants with confirmed lumbar radiculopathy will undergo clinical and biomechanical assessment. Pelvic alignment will be assessed in both the frontal plane and the sagittal plane using Kinovea software for image-based angle measurements. Hip joint proprioception will be evaluated using an isokinetic dynamometer to assess joint position sense (JPS) under controlled conditions. Additionally, the Numerical Pain Rating Scale (NPRS) will be used to quantify subjective pain levels.

The goal is to identify whether a correlation exists between pelvic asymmetry and deficits in hip joint proprioception and low back pain in this patient group. The findings may contribute to improving targeted rehabilitation strategies and clinical decision-making in the management of patients with lumbar radiculopathy.

Inclusion Criteria:

1. Patients with unilateral lumbar radiculopathy secondary to lumbar disc herniation at the level of L4-L5 and L5-S1 suffering from low back pain with radiating pain to the lower extremity from both sex.
2. Lumbar radiculopathy presented by sensory manifestations only.
3. The duration of the disease was 3 months or more.
4. The age ranged from 25 to 45 years old.
5. Body Mass Index (BMI) ranging from ( 18.5 to 24.9 kg/m² ) .

Exclusion Criteria:

1. Lumbar canal stenosis.
2. Cauda Equina lesions.
3. Lumbar radiculopathy with motor manifestations.
4. Acute lumbar radiculopathy ( symptoms duration less than 3 months ).
5. Diabetic neuropathy.
6. Previous lumbar surgery.
7. Lumbar trauma.
8. Deformities in the lumbar spine.
9. Rheumatoid arthritis.
10. Tumors and infections involving the lumbar spine.
11. Patients with Hip Joint Pathologies ( Osteoarthritis, labral tears, or previous hip surgeries ).

Adult patients aged 25 to 45 years, diagnosed with lumbar radiculopathy and referred to the outpatient clinic at the Faculty of Physical Therapy, Modern University for Technology and Information. All participants will be screened for pelvic asymmetry, hip joint proprioception deficits and low back pain .