Fig. 2.

Stiffness of the medial (blue, a full extension, b 30° flexion, c 60° flexion, d 90 degrees flexion) and lateral (green, e Full extension, f 30° flexion, g 60° flexion, h 90° flexion) compartment depending on the release of the lateral knee ligament complex. In the medial compartment, stiffness decreases with increasing release, whereas stiffness at the lateral compartment remains the same. *p < 0.05, **p < 0.01