Table 2.
Isokinetic, Balance, and Questionnaire Results (N = 150)
| Variable |
Group |
|||
| Returned to Sport (n = 86) |
No Return to Sport (n = 64) |
Returned to Sport at the Preinjury Level (n = 18) |
No Return to Sport at the Preinjury Level (n = 132) |
|
| Peak torque, injured limb, Nm | ||||
| Extension, 60°/s | 180.9 ± 56.3b | 147.1 ± 57.9b | 198.4 ± 52.9c | 162.3 ± 58.8c |
| Flexion, 60°/s | 97.8 ± 26.1b | 81.9 ± 28.1b | 104.1 ± 30.3c | 89.3 ± 27.3c |
| Extension, 300°/s | 108.4 ± 29.7b | 88 ± 34.6b | 113.9 ± 29.5 | 97.8 ± 33.4 |
| Flexion, 300°/s | 65.6 ± 15.6b | 57.2 ± 15.3b | 69.4 ± 18.4c | 61 ± 15.4c |
| Peak torque/body weight, injured limb, % | ||||
| Extension, 60°/s | 223.6 ± 69.2b | 181.2 ± 70.1b | 241.6 ± 63.2c | 200.7 ± 72.4c |
| Flexion, 60°/s | 119.8 ± 29b | 102.1 ± 35.8b | 125.8 ± 30.7 | 110.5 ± 33.1 |
| Extension, 300°/s | 132.8 ± 33.3b | 111.9 ± 30.3b | 138 ± 31.8 | 122 ± 33.4 |
| Flexion, 300°/s | 80.6 ± 18.5 | 74.9 ± 32.2 | 84.5 ± 21.5 | 77.3 ± 25.7 |
| Agonist : antagonist ratio, injured limb, % | ||||
| 60°/s | 57.6 ± 18.6 | 59.5 ± 21.7 | 53 ± 10.6 | 59.2 ± 20.8 |
| 300°/s | 62.4 ± 13.5 | 64.7 ± 13.6 | 61.4 ± 7.4 | 63.7 ± 14.2 |
| Limb symmetry index, % | ||||
| Extension, 60°/s | 19.8 ± 20.3b | 32.5 ± 21.5b | 12.4 ± 11.3c | 27 ± 22.2c |
| Flexion, 60°/s | 8.9 ± 14.6b | 19.3 ± 20b | 7.9 ± 11.8 | 14.1 ± 18.4 |
| Extension, 300°/s | 16.3 ± 14.5a | 21.3 ± 15.3a | 10.8 ± 6.9c | 19.4 ± 15.5c |
| Flexion, 300°/s | 5.5 ± 16.3 | 9.9 ± 20.5 | 1.3 ± 16.2 | 8.2 ± 18.4 |
| Stability index, ° | ||||
| Overall | 5.5 ± 2.5 | 6 ± 3 | 4.8 ± 1.8 | 5.8 ± 2.8 |
| Anterior-posterior | 3.3 ± 1.7 | 3.3 ± 1.9 | 2.6 ± 1.1 | 3.4 ± 1.9 |
| Medial-lateral | 3.8 ± 2 | 4.3 ± 2.5 | 3.7 ± 1.6 | 4.1 ± 2.3 |
| International Knee Documentation Committee score, % | 75.5 ± 14.9b | 66.6 ± 16.2b | 87.2 ± 9.5d | 69.5 ± 15.6d |
| Anterior Cruciate Ligament Return to Sport After Injury score, % | 52.4 ± 17.6b | 40.3 ± 18.6b | 70.6 ± 19.1d | 44.1 ± 16.6d |
a
The mean of those who returned to sport was different from that of those who did not (P < .05).
b
The mean of those who returned to sport was different from that of those who did not (P < .001).
c
The mean of those who returned to sport at the preinjury level was different from that of those who did not return at the preinjury level (P < .05).
d
The mean of those who returned to sport at the preinjury level was different from that of those who did not return at the preinjury level (P < .001).