Terminal Knee Extensions (TKEs) variations Getting the knee actively into terminal knee extension is a key milestone during the first few weeks following ACLR. It's also important to maintain this ability throughout rehab. Isolating the quads via open kinetic chain exercise variations will help, as will exercises like TKEs. Here's 2 options. Personally, I like the 2nd option more (TKE hip lock), as its got great "bang for buck" for being a true unilateral exercise, and getting the glutes to cont