Abdominal breathing is a breathing method that allows the abdomen to bulge when inhaling and concave when exhaling. Correct Steps: Lie on your back or sit comfortably, relax your whole body, put your right hand on your belly button and your left hand on your chest, maximize the outward expansion of your abdomen when you inhale, and maximize the inward contraction of your abdomen when you exhale. Points of skill: when inhaling slowly through the nose, the hand on the abdomen has the feeling of lifting upward, while the hand on the chest is not moving in its original position; when exhaling, the abdomen contracts and the hand on the abdomen has the feeling of falling down. Breathing should be long and slow, inhaling through the nose and exhaling through the mouth. An exhale and an inhale mastered in about 15 seconds, that is, deep inhalation for 3 to 5 seconds, holding the breath for 1 second, and then slowly exhale for 3 to 5 seconds, holding the breath for 1 second, each time 5 to 15 minutes can be. Adhere to abdominal breathing, can make the diaphragm range of motion increase, to improve lung function is very good, is the old age emphysema and other pulmonary ventilation disorder patients one of the important means of rehabilitation.