Spinal Stenosis: Symptoms, Stages & Treatment Without Surgery

What Is Spinal Stenosis?

Spinal stenosis is narrowing of the spinal canal that compresses the spinal cord or nerve roots. It occurs most commonly in the lumbar region (lower back) and is primarily a condition of ageing — prevalence increases sharply after age 60. It is the most common reason for spine surgery in adults over 65.

The Classic Symptom: Neurogenic Claudication

The hallmark symptom of lumbar spinal stenosis is neurogenic claudication: leg pain, heaviness, weakness, or tingling that occurs with walking and is relieved by sitting or leaning forward. Patients often describe being able to walk only 50–200 metres before their legs give out — then recovering immediately when they sit down or lean on a shopping cart.

This is distinct from vascular claudication (arterial disease causing similar symptoms): in vascular claudication, pain is relieved by standing still, not specifically by leaning forward or sitting. A bicycle test is helpful: stenosis patients can cycle comfortably (flexed spine position opens the canal) while vascular patients cannot.

Causes of Spinal Canal Narrowing

• Degenerative disc disease (loss of disc height pushes disc material backward)
• Facet joint osteoarthritis (osteophytes project into the canal)
• Ligamentum flavum hypertrophy (thickened ligament buckles into canal when spine is extended)
• Spondylolisthesis (vertebral slippage)
• In younger patients: congenital narrow canal (exacerbated by degenerative changes)

Non-Surgical Treatment

Physiotherapy

Flexion-based exercises open the spinal canal and are specifically beneficial for stenosis. The Williams flexion protocol (pelvic tilts, knee-to-chest, hip flexor stretch, partial sit-ups) is a structured approach. Extension exercises typically worsen stenosis symptoms.

Epidural Steroid Injections

Can provide 3–6 months of meaningful relief in 50–70% of patients. Useful to provide a pain-free window for rehabilitation.

Assistive Devices

Walking poles, a shopping trolley, or a rollator allow patients to maintain a slightly flexed posture during walking, often dramatically extending walking distance.

FIR Thermal Therapy

Reduces inflammatory swelling around the compressed nerve roots, relieves paraspinal muscle spasm secondary to altered gait, and improves tissue pliability. Most effective as a maintenance therapy rather than a cure for the structural narrowing.

Weight Loss

Reduces mechanical load on the spine and associated inflammation — among the most impactful non-surgical interventions.

When Is Surgery Indicated?

Surgery (typically decompressive laminectomy ± spinal fusion) is indicated when: quality of life is significantly impaired despite 3–6 months of conservative treatment, neurological deficits are progressive, or bladder/bowel function is threatened. Outcomes are generally good: 70–80% report significant improvement in walking capacity after surgery.