Diaphragm is the diaphragm, diaphragm contraction and relaxation activities based on the movement of breathing is called abdominal breathing. Breathing movement is divided into chest breathing and abdominal breathing. Normal adult respiratory movement for the thoracic and abdominal mixed respiration. 1. The principle of abdominal breathing by diaphragm contraction and contraction: diaphragm contraction and diastole can displace the organs and organs in the abdominal cavity, resulting in the undulation of the abdominal cavity, pulling the thoracic cavity, making the volume of the thoracic cavity change, which causes the contraction and diastole of the lungs, resulting in respiration. 2. Abdominal breathing exercise common situation: male respiratory exercise to abdominal breathing, because the male respiratory exercise to diaphragmatic movement, so there is a clear lower chest, upper abdominal movement, that is, abdominal breathing. Although abdominal respiratory movement is predominant, it is not without the presence of thoracic respiration; both breathing patterns are present. In females, the intercostal muscles respiratory movements are predominantly involved, i.e., thoracic breathing is predominant, but abdominal breathing is also present. For patients with abnormal respiratory movements, they should go to a regular hospital in time to find the cause of the disease and have targeted treatment.