Open Chain Knee Flexion and Extension

The same thing transpires around the tibia and you put such an emphasis on tibial internotation externrotation. I've struggled with just creating enough torque other than the muscular contraction in the open chain. Going closed chain allows you to create torque off the ground to then manipulate the joints in the closed chain environment. You can get more bang for your buck by doing both, it's not one or the other.