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. Author manuscript; available in PMC: 2015 Oct 23.
Published in final edited form as: Am J Sports Med. 2015 Jun 29;43(9):2233–2241. doi: 10.1177/0363546515589164

TABLE 2.

Loading Applied to Knee Specimens and Their Kinematic Responsesa

Biomechanical Variable Locked IFR Free IFR P Value
Nonpivot trials
    Loading
        Peak landing force (×BW) 4.2 ± 0.4 4.2 ± 0.2 .754
Pivot trials
    Loading
        Peak landing force (×BW) 5.0 ± 0.7 4.5 ± 0.5 .026c
        Peak internal tibial torque, N·m 31.3 ± 5.9 27.8 ± 5.5 .096
    Knee kinematicsb
        Peak relative anterior tibial translation, mm 8.2 ± 1.6 6.7 ± 1.1 .003c
        Peak cumulative anterior tibial translation, mm 8.9 ± 1.7 7.3 ± 1.2 .004c
        Peak relative internal tibial rotation, deg 19.7 ± 3.6 17.5 ± 2.9 .072
        Peak cumulative internal tibial rotation, deg 21.6 ± 3.9 19.6 ± 2.9 .100
a

Data are reported as mean ± SD. BW, body weight; IFR, internal femoral rotation.

b

For each specimen, peak values of all pivot trials, excluding the trial during which ACL failure occurred, were averaged.

c

Statistically significant difference between groups (P < .05).