Two years ago I partially tore my left pcl so my left knee has been kind of delicate since then. This makes hamstring curls a difficult exercise because I feel a lot of pressure in the back of my knee. I know for hamstrings I can also do rdl’s, good morning, straight leg deadlifts, etc. all of which I feel less knee pressure, but are these exercises working different muscles because I’m not closing the joint? any recommendations on similar exercises to hamstring curls that might be easier on my knee?