Blender Beginner Rigging with Inverse Kinematics
Blender 3d Modeling and Animation tutorials and lessons.
How to use inverse kinematic with Blender model animation. IK (inverse kinematics) sets up armature so that you move the far end of an arm or leg and the connect bones will move automatically. This makes animating much easier since you can control the hand or foot positions easily and the rest of the bones follow.