Your scan says severe spinal stenosis. It did not predict who improved with exercise

When a lumbar scan comes back with the word "severe" printed on it, that word tends to make the next decision. Radiographically severe spinal stenosis is often referred straight toward a surgical opinion, on the reasoning that conservative care would only postpone what is coming anyway. A study published on August 8 in Physical Therapy went looking for the evidence behind that reasoning and could not find it.

What the study looked at

The team ran a retrospective analysis of 1,806 people with lumbar spinal stenosis who had gone through an outpatient exercise based program led by physical therapists. Their imaging had already been graded mild, moderate, or severe. The outcomes tracked were pain, back pain related disability, patient specific function, use of analgesic medication, and lumbar extensor strength (Physical Therapy, 2026).

Across the whole sample, every one of those measures improved, and 11.5% of participants reported stopping narcotic medication during treatment. The result the authors put in their title, though, is the comparison between the three imaging groups. There were no significant differences in treatment response across mild, moderate, and severe stenosis on any outcome measured. The people whose scans looked worst improved by about as much as the people whose scans looked mildest.

The authors are direct about why this matters. They note that no studies actually support the premise that people with more radiographically severe stenosis respond poorly to conservative management. It is a widely held clinical belief that had simply not been tested at this scale.

What the headline misses

Two things, and they run in opposite directions.

The first is that the improvement figures are softer than they look. This was a retrospective analysis of a single arm clinical trial. There was no control group and no comparison condition, so the size of everyone's improvement cannot be credited to the exercise program alone. People tend to enter care when their symptoms are at their worst, symptoms fluctuate, and being enrolled in something attentive has an effect of its own. All of that sits inside the improvement numbers, undifferentiated. The follow up was also short term, so the paper says nothing about where these people were a year or five years later, or how many eventually had surgery.

The second is that none of that weakens the finding the title actually makes. The comparison between severity groups is internal. Everyone was in the same program, measured the same way, over the same window. Whatever regression to the mean and natural fluctuation contributed, they contributed to all three groups. In a sample of 1,806, the imaging grade still failed to sort people into responders and non responders. That null result is the sturdier half of this paper, and it is the half worth carrying.

What it is not is an argument against surgery. Some people with spinal stenosis need decompression and do well from it, and that decision belongs to them and their surgeon. The narrower claim, the one this data supports, is that the grade on the report is a poor instrument for deciding who deserves a fair attempt at movement first.

The grade, and the person carrying it

Narrowing in the lumbar spine is extremely common with age and only loosely tied to symptoms. In the Framingham Heart Study imaging sample, acquired relative stenosis was present in 47.2% of people aged 60 to 69, and absolute stenosis in 19.4%. Absolute stenosis was associated with low back pain, but at an odds ratio of 3.16 with a confidence interval running from 1.05 all the way up to 9.53 (The Spine Journal, 2009). A real association, very imprecisely known.

What I see in clients is what happens after the word lands. A severity grade does not stay on the page. It becomes a self description, and then it becomes a way of walking. Someone who has read "severe" on a report starts protecting a back they now understand to be structurally compromised. The stride shortens. The far shop stops being worth it. The trunk is held still through every transfer, and the stillness becomes its own kind of ache. By the time I meet them, the long standing back pain they describe is partly the narrowing and partly several years of moving as though the narrowing were the whole story.

You have not lost the movement. You have lost trust that movement will help. A radiology grade is remarkably efficient at removing that trust, and a paper like this is a reason to hand some of it back.

What to take from it

If you carry a stenosis diagnosis and you have been told your imaging looks severe, this is not permission to skip a consultation. It is a reason to bring a specific question to one: given that imaging severity did not predict who responded in this sample, is a proper trial of exercise based rehabilitation reasonable for me before we discuss anything more invasive. That is a conversation for the clinician who knows your case, particularly if you have leg symptoms alongside the back pain, or any change in bladder or bowel function, which needs attention on its own terms.

The Feldenkrais Method® works in a different place from a rehabilitation program, and it sits alongside physiotherapy rather than in place of it. Awareness Through Movement®, the guided lesson format of the Feldenkrais® tradition, uses small slow movements taken only into the range where they feel easy, pleasant, and comfortable. The target is not the canal in the spine. It is how the nervous system organizes the trunk, the hips, and the breath while walking, which is where the daily cost of stenosis is usually paid. Among the movement methods a person practices on their own, yoga, Pilates, tai chi, and Feldenkrais based work each operate by a different mechanism and each has its own strengths. People ask me all the time whether yoga or Pilates is better for back pain, and the honest answer there runs the same way it does here: the question is less which method and more whether you can keep doing it.

The Feldy online movement program is one way to keep that kind of gentle daily attention going in the weeks between appointments. None of it changes the picture on the film. It is about the walking you do either way.