Don’t think about it, don’t force it, don’t try to practice it… all the same things my teacher said. As far as breath, in my Gung fu practice, the body motion creates the breath, and the breath rides the motion. No need to exhale or inhale, when I turn the waist the breath goes out, when the waist returns to neutral, the chest will recoil, expand, and inhale on its own. This is why we only do chest compressions in CPR, we push down on chest but it recoils on its own. So, motion creates the breath, breath rides the motion. Thus, the faster we move the faster we breathe. No need to control it. However, in Tai Chi Chuan practice we try to stretch the breath out to match the speed of the form since we don’t turn the waist as much as the hip.