Lumbar stenosis: what it is, why walking is hard and treatment options
Lumbar canal stenosis narrows the space through which the nerves pass and produces its most characteristic symptom: neurogenic claudication. We explain what causes it, how it is diagnosed and when decompression surgery is considered.
Lumbar stenosis is the narrowing of the canal through which the nerves pass in the lower part of the spine. As the space shrinks, the nerve roots are compressed and the most characteristic symptom appears: pain, heaviness or cramping in the legs when walking or standing, which forces you to stop and which improves when sitting or leaning forward (neurogenic claudication). It is usually due to age-related wear, so it is more common from the age of 60. Treatment starts with conservative measures; when the limitation is significant and does not improve, or when there is loss of strength, decompression surgery is considered.
What lumbar canal stenosis is
Picture the spinal canal as a tunnel through which the nerves travel. Over the years, that tunnel can narrow due to arthritis, discs that lose height and ligaments that thicken. As the space shrinks, the nerves have less room and become irritated, especially when the spine is straight or bent backwards (standing, walking).
The key symptom: claudication when walking
What distinguishes stenosis is its pattern: the patient walks a certain distance, heaviness and cramping in the legs begin, they have to stop, and when sitting or leaning forward (for example on a shopping trolley) the pain eases and they can resume walking. That is why many patients tolerate cycling better than walking: they pedal bent forward.
Why walking hurts and sitting relieves
Leaning forward opens the canal and gives the nerves room; standing straight closes it. This also explains why in stenosis walking a lot can worsen things, unlike sciatica from a herniation. We develop this in Recommended and discouraged exercises for lumbar stenosis.
Treatment: from conservative to surgery
- Conservative: physiotherapy focused on flexion, tolerable aerobic exercise (cycling), weight control, pain relief and, in selected cases, injections. Many patients stabilise here.
- Decompression surgery: when the walking distance shrinks greatly, quality of life drops or weakness appears. The canal is widened (laminectomy or minimally invasive techniques) and, in some cases with instability, a fusion is added. See Lumbar fusion: recovery.
To know when the picture has become surgical, see When is lumbar stenosis severe?
Related information
Frequently asked questions
Can lumbar stenosis be cured without surgery?
Conservative treatment does not reverse the narrowing, but it controls symptoms in many patients for years. Surgery is the only option that physically widens the canal.
Is walking good with lumbar stenosis?
Walking is healthy, but in stenosis it can trigger the pain. Tolerable activity is recommended, often better on a bike or walking slightly bent forward.
Is stenosis surgery dangerous?
Decompression is a common procedure with good outcomes. The risk depends on the technique and the patient; a specialised neurosurgeon adapts the approach to each case.
Will I walk without pain after surgery?
The main goal of surgery is precisely to recover walking distance. Most patients improve their claudication markedly.
Do you have to stop every few metres when walking?
The team assesses your case and advises you on the most suitable treatment for lumbar stenosis, from physiotherapy to decompression surgery.