Table 2.
Kinematic Assessment of the Ascendant Phase of the Single-Leg Squat Through Dynamic RSA a
| Rotation, deg | Translation, mm | |||
|---|---|---|---|---|
| Internal-External | Varus-Valgus | Anterior-Posterior | Medial-Lateral | |
| 60°-45° | ||||
| ACL-injured | 6.6 ± 1.5 b | –4.2 ± 1.3 | 19.0 ± 0.9 | 0.3 ± 0.5 b |
| SB | 4.3 ± 2.0 | –3.5 ± 1.7 | 18.0 ± 1.4 | 0.1 ± 0.5 |
| SBLP | 5.7 ± 1.9 | –3.9 ± 1.5 | 19.2 ± 1.1 | 0.3 ± 0.8 b |
| Healthy | 1.7 ± 1.7 | –6.9 ± 1.6 | 20.0 ± 2.1 | –2.0 ± 0.6 |
| 45°-30° | ||||
| ACL-injured | 6.1 ± 1.4 b | –3.1 ± 1.0 | 15.3 ± 0.9 | 0.1 ± 0.5 b |
| SB | 3.9 ± 1.6 | –3.0 ± 1.5 | 12.6 ± 1.4 b | –0.1 ± 0.6 b |
| SBLP | 5.2 ± 1.7 | –3.8 ± 1.2 | 13.5 ± 1.3 b | 0.2 ± 0.7 b |
| Healthy | 1.9 ± 1.4 | –5.6 ± 1.7 | 16.4 ± 2.3 | –2.2 ± 0.7 |
| 30°-15° | ||||
| ACL-injured | 5.0 ± 1.3 | –2.1 ± 0.8 b | 9.8 ± 1.0 | 0.0 ± 0.5 b |
| SB | 4.2 ± 1.7 | –1.6 ± 1.1 b | 6.8 ± 2.0 | 0.0 ± 0.7 b |
| SBLP | 4.7 ± 1.7 | –2.5 ± 1.0 | 5.7 ± 1.3 c | –0.1 ± 0.7 b |
| Healthy | 1.8 ± 1.8 | –4.5 ± 1.4 | 9.1 ± 2.8 | –1.8 ± 0.8 |
| 15°-0° | ||||
| ACL-injured | 4.1 ± 1.4 | –0.7 ± 0.8 | 4.0 ± 1.0 | –0.4 ± 0.5 |
| SB | 4.4 ± 2.0 | –0.6 ± 1.0 | 1.0 ± 2.2 | 0.1 ± 0.7 |
| SBLP | 4.9 ± 1.5 | –1.4 ± 1.0 | –1.6 ± 1.4 c | –0.5 ± 0.8 |
| Healthy | 3.5 ± 2.4 | –3.0 ± 1.3 | 2.2 ± 2.2 | –1.1 ± 0.9 |
a All values are reported as mean ± SE. ACL, anterior cruciate ligament; RSA, roentgen stereophotogrammetric analysis; SB, single-bundle; SBLP, single-bundle plus lateral plasty.
b Statistically significant difference compared with the healthy group (P < .05).
c Statistically significant difference compared with the ACL-injured group (P < .05).