Hamstring Mechanical Disadvantage

In ACL reconstruction clients, hamstrings can function like a muscular version of the ACL by resisting anterior tibial translation. Hamstrings can limit anterior tibial glide because they restrain anterior tibial movement. When hamstring leverage is reduced, quadriceps can contribute more effectively to knee extension. For terminal knee extension, the tibia needs anterior glide and external rotation. A recommended local strategy is to mechanically disadvantage the hamstrings and then activate the quadriceps.