Etiology — what causes it

Progressive narrowing of the central canal, lateral recess, or foramen due to facet hypertrophy, ligamentum flavum thickening, disc bulging, and degenerative spondylolisthesis. The result is mechanical and vascular compromise of neural structures, particularly during extension.

Epidemiology — who gets it

Symptomatic lumbar stenosis affects roughly 11% of adults over 60 (Kalichman et al., Spine J 2009). Prevalence rises sharply with age. Often coexists with degenerative spondylolisthesis.

Clinical signs

Positive shopping cart sign (relief with trunk flexion), positive two-stage treadmill test (improved tolerance walking inclined vs flat), pain reproduction with sustained extension, normal or mildly reduced lumbar flexion. Neurological exam may be normal or show diffuse mild signs.

Symptoms

Neurogenic claudication — buttock and leg pain, heaviness, weakness, or numbness with walking and standing, relieved by sitting or forward leaning. Symptoms classically improve when leaning on a shopping cart or walking uphill. May be unilateral or bilateral.

Best evidence for chiropractic treatment

The Slätis trial and FORENSIC study indicate that supervised exercise programs produce outcomes comparable to surgery for many patients with mild-to-moderate stenosis at 2-year follow-up. JOSPT CPGs and the North American Spine Society guidelines support a conservative-first approach with manual therapy, flexion-biased exercise, gait and balance training, and graded aerobic exercise. Surgical decompression is appropriate when symptoms are progressive, disabling, and refractory to structured conservative care.

Subtypes

  • Central canal stenosis. Bilateral symptoms with classic neurogenic claudication.
  • Lateral recess stenosis. Often unilateral, dermatomal radicular symptoms.
  • Foraminal stenosis. Localized nerve root compression with positional dependence.

When to seek emergency care

Some symptoms need urgent medical attention — not a chiropractic visit. Call 911 or go to the nearest emergency department for: progressive limb weakness, loss of bowel or bladder control, saddle anesthesia (numbness in the groin/inner thighs), severe unrelenting pain unrelieved by position, signs of fracture after significant trauma, chest pain, stroke-like symptoms (face drooping, arm weakness, speech changes), or any rapidly worsening or unusual symptom.

Bottom line

Lumbar stenosis often improves substantially with flexion-biased exercise, manual therapy, and graded walking — surgery isn't always the first answer.