Correlation Between Y-Balance Test and Balance, Functional Performance, and Outcome Measures in Patients Following ACL Reconstruction.
Jin Seong Kim, Ui Jae Hwang, Moon Young Choi and 4 others
PMID 35136688WHAT IT FOUND
One year after ACL reconstruction, Y-Balance scores did not track static balance, knee laxity, or hamstring-to-quadriceps ratio.
They showed weak links to knee strength and stronger links to hop and vertical jump tests.
Key findings
01Y-Balance scores did not correlate with static balance, knee joint laxity, or the hamstring-to-quadriceps strength ratio.
02Posteromedial, posterolateral, and composite Y-Balance scores had weak correlations with knee extensor and flexor peak torque per body weight at 60°/s.
03All Y-Balance directions and the composite score had weak-to-moderate correlations with single-leg hop and single-leg vertical jump performance.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The study was retrospective, so selection bias may have affected which patients were included. Pre-surgery activity level was not considered, which may influence balance and functional test performance. Patients were tested at about one year after surgery, so the correlations may not apply earlier or later in rehabilitation. The study included only patients with a single-bundle hamstring autograft and no other major knee surgery or injury, so it may not apply to more complex ACL cases.
The easy way to misread this
Do not conclude that the Y-Balance test measures static balance or knee stability after ACL reconstruction. In these patients, Y-Balance scores did not correlate with static balance, knee laxity, or hamstring-to-quadriceps ratio, and their links with strength and hop or jump tests were weak to moderate.