Hi all,
Imagine I have sitting character and I want to make him just raise calf. No IK, nothing. Just rotate one damn bone. When I do it character's pelvis moves abit up. Yes, it is just abit, but it ruins whole animation. Why in the world pelvis should react to movement of calf? Calf rotation does not affect pelvis position/rotation movement limits any way and still damn bone moves!
Any advice?

P.S. Even more if I have standing character in t-pose and I try to bend his knee, it move entire(!!!) body. 

P.P.S. Even more! I have standing character, locked hip movement and rotation and bended knee - hip and above it should be not affected correct? It still affects damn entire body!!!