"Anonymous. You still haven't told me how you bend your knees so your shins are at an angle 45 degrees including your feet with your upper body verticle. How do you propose you have your body in front of your knees. Either you are leaning forward, or your knees are straight. Both of which are incorrect."
I don't. When the standing knee bends, I put my body ahead of my feet, vertically aligned and positioned OVER my standing knee, which has bent forwards. The forward of knee comment was a typo, as I already pointed out.
On the other hand, in actions where the knee has not yet bent, the body might very well be AHEAD of the knee.