Table 3.
Postlanding Integrated Electromyography of Knee Muscles and Knee Sagittal-Plane Kinematics for the Chronic Ankle Instability and Control Groups
| Variable |
Chronic Ankle Instability Group |
Control Group |
t36 |
P Value |
Power |
| Integrated electromyography, %·ms | Mean ± SD (95% Confidence Interval) | ||||
| Vastus medialis oblique | 35.36 ± 10.05 (30.60, 40.07) | 38.30 ± 10.45 (33.36, 42.82) | −0.89 | .382 | 0.22 |
| Vastus lateralis | 34.96 ± 10.41 (24.17, 45.40) | 43.99 ± 31.86 (32.78, 54.01) | −1.17 | .248 | 0.32 |
| Medial hamstrings | 47.39 ± 9.49 (35.39, 59.50) | 55.46 ± 34.44 (43.20, 67.30) | −0.98 | .332 | 0.26 |
| Lateral hamstrings | 45.66 ± 9.57 (41.39, 49.62) | 50.40 ± 8.74 (46.46, 54.70) | −1.60 | .119 | 0.48 |
| Kinematics, ° | |||||
| At ground impact | 7.81 ± 8.27 (11.53, 4.09) | 14.09 ± 8.72 (18.01, 10.17) | −2.28 | .029a | 0.74 |
| At 100 ms post–ground impact | 51.36 ± 5.29 (53.74, 48.98) | 58.66 ± 7.66 (62.10, 55.22) | −3.42 | .002a | 0.96 |
a
Difference in knee sagittal-plane kinematics after landing (P < .05).