Severity of structural lumbar spinal stenosis does not impact responsiveness to exercise-based rehabilitation.

There was no control group, so the study cannot separate the effects of the rehabilitation program from natural recovery or normal symptom fluctuation. Follow-up was only about 3 months, so it does not show whether the improvements lasted. Disability data at discharge were available for 64.0% of participants, and strength data for 49.1% of participants in the completed-data analysis. Participants were grouped by radiology reports rather than by symptoms such as claudication, and radiographic stenosis can be present without symptoms. The program included machine-based lumbar extension exercise, directional preference exercises, and education, so the contribution of any single component cannot be separated. The cohort was not balanced by age, sex, BMI, and stenosis type at baseline; adjustment may not fully remove these differences. People who attended fewer than 3 visits were excluded, and those who chose not to continue may differ from those included.

The paper lists Magistro as a funding source and states that the funders played no role in the design, conduct, or reporting of the study.

Do not conclude that machine-based exercise alone caused these improvements or that severe stenosis should be treated with exercise instead of surgery. Participants also received directional preference exercises and education, and there was no control group, so the study cannot separate the program's components or rule out natural recovery.