Mirror Image Spine Correction Exercises Versus Conservative Physiotherapy for Lumbar Radiculopathy

Lumbar radiculopathy is a neuromusculoskeletal disorder commonly caused by lumbar disc herniation or foraminal stenosis leading to nerve root irritation or compression. Symptoms commonly include radiating leg pain, paresthesia, weakness, altered reflexes, and reduced physical function.

Conservative physiotherapy is recommended as first-line management and may include education, graded exercise, mobility restoration, strengthening, neural mobilization, and symptom management. However, treatment response is heterogeneous, and many patients continue to experience persistent symptoms.

Most previous rehabilitation studies have relied primarily on patient-reported outcomes such as pain and disability. These measures are clinically important but may not fully reflect biological recovery of the affected nerve root.

Diffusion Tensor Imaging (DTI) is an advanced magnetic resonance imaging technique that can quantify neural tissue microstructure. Parameters such as Fractional Anisotropy (FA), Mean Diffusivity (MD), Axial Diffusivity (AD), and Radial Diffusivity (RD) may provide objective markers of nerve recovery.

Mirror Image Spine Correction Exercises are individualized posture-based exercises designed to move the trunk or pelvis opposite to identified alignment deviations. This approach may improve biomechanics, reduce abnormal loading, and decrease neural irritation.

This study is a prospective randomized, parallel-group, superiority trial. Eligible adults with unilateral lumbar radiculopathy will be randomly allocated in a 1:1 ratio to:

Mirror Image Spine Correction Exercise group Standardized Conservative Physiotherapy group Both groups will receive supervised treatment sessions three times per week for 12 weeks.

Primary Outcome:

Change in lumbar nerve root microstructural integrity measured by DTI at baseline and week 12.

Secondary Outcomes:

Pain intensity Disability (Oswestry Disability Index) Spinal alignment Safety outcomes and adverse events The study aims to determine whether Mirror Image Spine Correction Exercises produce superior clinical and imaging outcomes compared with conservative physiotherapy.

• Mirror Image Spine Correction Exercises (Behavioral): Participants will receive an individualized supervised exercise program based on identified postural alignment deviations. Treatment will be delivered three sessions per week for 12 weeks and may include trunk and pelvic corrective movements, mobility, stabilization, and a prescribed home exercise program.
• Conservative Physiotherapy (Behavioral): Participants will receive standardized conservative physiotherapy three sessions per week for 12 weeks including education, graded exercise, mobility exercises, strengthening, neural mobilization, and clinically indicated adjunctive non-invasive techniques.

Primary outcomes

• Lumbar Nerve Root Fractional Anisotropy [Baseline and Week 12]: Change in lumbar nerve root microstructural integrity measured using Diffusion Tensor Imaging (DTI) Fractional Anisotropy.

Secondary outcomes

• Pain Intensity [Baseline and Week 12]: Measured using Numeric Pain Rating Scale (0-10).
• Spinal Alignment [Baseline and Week 12]: Measured using digital posture analysis.
• Additional DTI Parameters [Baseline and Week 12]: Mean Diffusivity, Axial Diffusivity, and Radial Diffusivity.

Sex: All, ages: 18 Years to any

Inclusion Criteria:

* Adults aged 18 years or older. Clinical diagnosis of unilateral lumbar radiculopathy. Presence of at least two of the following: dermatomal radiating leg pain, neurological deficit, positive neural tension test.

MRI-confirmed lumbar nerve root compression or irritation consistent with symptoms.

Pain intensity of 3/10 or greater. Able to undergo MRI and Diffusion Tensor Imaging (DTI). Able to understand study procedures and provide written informed consent.

Exclusion Criteria:

* Previous lumbar spine surgery. Bilateral radiculopathy or unclear diagnosis. Tumor, infection, fracture, inflammatory spinal disease, or cauda equina syndrome.

Severe progressive neurological deficit requiring urgent treatment. Contraindications to MRI (pacemaker, incompatible implants, severe claustrophobia).

Recent lumbar injections or surgery. Other neurological or musculoskeletal disorders affecting outcomes. Pregnancy if MRI contraindicated by local policy. Cognitive impairment or inability to follow instructions.

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• Rubin DI. Epidemiology and risk factors for spine pain. Neurol Clin. 2007 May;25(2):353-71. doi: 10.1016/j.ncl.2007.01.004. PMID 17445733