Don't think I've heard it or or seen anyone mention it when doing RG. Is it not really important when you holding a position like mission control that you move your hips in the correct way so that the flexibility depends on your hip flexibility and not your knees which couldn't be good for you.
If so what is the correct hip movement/placement for left leg mission control? Tips etc.
If so what is the correct hip movement/placement for left leg mission control? Tips etc.