| KOA | Knee osteoarthritis. |
| CKC | Closed-kinetic-chain exercise. |
| OKC | Open-kinetic-chain exercise. |
| COP | Center of pressure. |
| AP | Anterior–posterior. |
| ML | Medial–lateral. |
| RMS | Root mean square. |
| GRF | Ground reaction forces. |
| YBT | Y-balance test. |
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