The proper way to do abdominal breathing is to relax and then breathe naturally through your abdomen while keeping your chest in place. The specific steps are as follows. 1. First take a supine or comfortable sitting position. Place your hand at the navel, feel the movement of the abdomen and relax your whole body naturally. 2. In the inhalation of air, you need to maximize the expansion of the abdomen, so that the abdomen gradually bulging, while the chest remains unchanged. 3. During exhalation, maximize the contraction of the abdomen, so that the abdomen sinks inward, gradually approaching the spine, while the chest remains unchanged, and exhale as much gas as possible from the lungs. Note: When performing abdominal breathing, it is important to stay relaxed, without deliberately puffing up the abdomen, and pay attention to keep the chest unchanged.