Cognitive therapeutic exercise in early proprioception recovery after knee osteoarthritis surgery.
Yubao Ma, Zhijiao Fan, Weiguang Gao and 6 others
PMID 36188901WHAT IT FOUND
Adding 10 minutes of cognitive joint-position training to standard post-knee surgery rehab improved accuracy at 30 and 60 degrees of knee bend after 4 weeks.
It made no difference at 90 degrees. Both groups improved their proprioception, so the benefit was specific to certain angles.
Key findings
01After 4 weeks, the group receiving cognitive therapeutic exercise had smaller errors in joint position sense at 30 and 60 degrees of knee flexion compared to the control group.
02There was no significant difference between the two groups in joint position sense accuracy when the knee was bent at 90 degrees after 4 weeks.
03Both the experimental and control groups showed improved joint positioning accuracy compared to their pre-treatment baselines after 2 and 4 weeks.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The sample size was small (37 patients), and the study was conducted at a single centre. The statistical reporting contains a contradiction: sentence 67 claims a significant difference at 30 degrees but reports P = 0.350, which is not significant. This may be a typographical error in the source, but it undermines confidence in the specific result at that angle. The benefit was limited to specific angles (30 and 60 degrees) and not seen at 90 degrees, indicating the effect is not uniform across the range of motion. The follow-up period was short (4 weeks), so long-term effects on function or fall risk are unknown.
Declared interests
The authors declare no commercial or financial conflicts of interest. The research was funded by a special science and technology development project of Beijing Rehabilitation Hospital.
The easy way to misread this
Do not assume CTE improves proprioception at all knee angles. The study found no significant benefit over standard therapy at 90 degrees of flexion, and the statistical reporting for the 30-degree result is internally inconsistent.