Knee mechanics differed after ACL reconstruction; walking speed results were inconclusive
Peak knee bending and a measure of knee loading were lower after surgery; walking speed did not differ significantly.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
People assessed after ACL reconstruction showed differences in knee mechanics compared with healthy controls, while the walking-speed comparison was not statistically significant. The analysis modeled when group differences stopped reaching statistical significance. Those estimates do not establish that every patient's walking had returned to normal or that individual recovery was complete.
The timing estimates came from modeling group comparisons. A nonsignificant difference cannot establish equivalence or complete recovery, and the abstract does not provide evidence that reinjury risk was reduced.
What researchers found
Peak knee bending angle: standardized mean difference (Cohen's d)
Patients versus healthy controls, assessed 3–107 months after reconstruction.
What the knee measures mean
Knee flexion angle describes how far the knee bends. Flexion moment describes the turning effect of forces around the knee in the bending direction. These capture different aspects of walking: joint position and mechanical loading.
Reading the effect size
The -0.48 estimate expresses the lower knee-bending angle in standard-deviation units. Standardization uses variability in measurements as the unit, allowing results from different studies to be compared; the gap is not measured in degrees.
The original publication
Time to normalization of gait following ACL reconstruction compared with healthy controls: A systematic review and meta-analysis.
Chen S, Gong H, Lyu C et al.
Gait Posture · 2026
- PubMed ID
- 40946054
- Record checked
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