Bring up the shoulders and let the chest widen as you reach a point of difficulty. It lets the other two breathing ways work. You have the flat muscle under the lungs which massages the stomach and contracts and expands the lungs. You have the muscles between the ribs which protect and encase your lungs and the shoulders which expand the lungs as well.
Start square breathing doing 2,2,2,2 on all phases or as high as you can 10 15 and start to move as if you are gliding on ice. If you have never done this imagine and start to move. Here focus on the hips and think of a flame coming from an oil lamp. The flame will align upwards no matter where the oil is tilted so relax the hips and let them move freely as the spine aligns underneath them to make your movement more free and relaxed. Relaxed means you are aware and controling the tension. It does not mean without tension at all. Only the dead have no tension in their bodies.