Hey everyone, I’m trying to figure out how to pin the knee with an ik running on it. To perform an animation of a man getting up off the ground. I’d like to have his knee planted as he’s kneeling on the floor. I know having the hip stretch from the knee is a good solution, and I am aware that there is a great tutorial on AFR, which I have bought. However, I made the mistake of buying part 4 which covers the legs, which doesn’t really cover how to lock the knee down. It just tells you to reference how it was done on the elbow, in another book 
So if anyone could walk me through how to set up this rig I’d greatly appreciate it 

