When inhaling, the hand is raised to the chest from the side, which conforms to the principle of inhalation rising, and when exhaling, the hand is raised to the top of the head, which produces the effect of reverse abdominal breathing, which conforms to the principle of exhalation falling, and the qi machine descends to the abdomen. When you inhale again, it falls on your chest. The speed effect is the chest expansion movement, which is also in line with the principle of inhalation rising, and then falls back to the sides of the body when exhaling. Accord with that principle of expiratory descent. So it feels comfortable to practice.

However, if you use Ma Xuzhou's new training method in 1993, you can raise your hand directly to the top of your head when inhaling and put it down directly when exhaling, which seems to conform to the principle of inhalation rising and exhalation falling, but it feels uncomfortable to practice, because the breathing depth of this method is not as good as the above method, so the effect is different.