Is there any benefit of adding a central nervous system-focused intervention to a manual therapy and home stretching program for people with frozen shoulder? A randomized controlled trial.

Frozen shoulder is painful and stubborn, and researchers have been looking for ways to speed recovery beyond standard manual therapy and stretching. This small trial asked whether adding a central nervous system focused approach, using graded motor imagery and sensory discrimination training, could improve on manual therapy plus home stretching alone. Thirty four people with primary frozen shoulder were randomly assigned to one of the two programs over twelve weeks, with outcomes checked before treatment, right after, and three months later. The result was straightforward: adding the brain focused training made no measurable difference.

Pain, disability, shoulder movement, and patient rated function were all similar between groups at every time point, with no statistically significant differences found. This is interesting because it suggests the extra complexity and time investment of retraining sensory and motor processing did not translate into better outcomes here, though the small sample size means the finding should be read as preliminary rather than conclusive.

If you have frozen shoulder, you know how frustrating the pain and stiffness can be, and how badly you want treatments that actually speed things up. This study tested whether adding special brain training exercises, things like imagining movements and practicing telling apart different sensations, would help more than just manual therapy and stretching exercises at home. Thirty four people took part, split between the two treatment approaches, and were followed for twelve weeks of treatment plus three months afterward.

The people who got the extra brain training did not end up with less pain, better movement, or better shoulder function than those who only did manual therapy and stretching. Both groups seemed to do similarly well or similarly poorly, without a real advantage for the added component. Because this involved a small group of people, it cannot rule out that a benefit exists that this study was too small to detect.

It simply shows that in this particular trial, the extra training did not clearly help beyond standard care.

This is a summary of research, not medical advice. Talk to your own healthcare provider about anything affecting your care.

This trial addresses a specific clinical question: for patients with primary frozen shoulder already receiving manual therapy and a home stretching program, does layering on a central nervous system focused intervention, specifically graded motor imagery and sensory discrimination training, add measurable benefit? This matters given growing interest in central sensitization as a contributor to frozen shoulder pain and disability. Thirty four patients were randomized to manual therapy plus home stretching alone or the same program plus the CNS focused component, with assessments at baseline, after a two week washout, post treatment, and at three month follow up using the Shoulder Pain and Disability Index, visual analog pain scale, range of motion, and the Patient Specific Functional Scale. No statistically significant between group differences emerged on any outcome, either immediately post treatment or at follow up.

This means the trial does not support an additional effect from the CNS component over manual therapy and stretching alone, though within group improvements over time cannot be attributed to either intervention specifically based on this comparison design. The main limitation is sample size: with only 34 participants, this is a small trial, and a true but modest effect could easily have gone undetected. Clinicians should read this as informing the added value question specifically, not as evidence that manual therapy and stretching alone are optimal, nor that CNS focused approaches lack merit in other contexts or dosing.