Fig. 3

Representation of the IK and FD ligament strain values within the ACL (anterior cruciate ligament) (A), PCL (posterior cruciate ligament) (B), MCL (medial collateral ligament) (C), DMCL (deep medial collateral ligament) (D), LCL (lateral collateral ligament) (E), and POPL (popliteofibular ligament). F The results are presented for the intact (solid line) and ACL-sectioned (dashed line) knee states during passive knee flexion from 0 to 100° with applied 5Nm IR (internal rotation) torque [25, 26]