Excuse me, how to calculate healthy breathing?

1. Breathing will slow down. Therefore, the unconscious mind is much calmer than chest breathing. Don't underestimate the little thing of breathing, it has been imperceptibly affecting people. 2. Take a deep breath. The amount of air inhaled at one time is about 1.5 times that of chest breathing. Methods: Chest breathing is chest ups and downs, the abdomen remains motionless, and abdominal breathing is just the opposite. 1. When breathing, the chest is still. At first, you can put your hand on your stomach and feel the ups and downs of your abdomen. 2. When inhaling, the abdomen naturally bulges. Feel the air enter the abdomen little by little, and hold it for 1-2 seconds when inhaling fully. Experience this feeling. 3. When exhaling, try to contract the abdomen and feel the air coming out of the stomach. At first, practice 1-2 hours every day, and gradually lengthen the time until you can keep abdominal breathing when you sleep. Generally, you don't have to deliberately control it if you keep active practice for 1-2 weeks. Abdominal breathing has many advantages. Long-term practice can make the heart calm, seldom angry, and the thinking seems to be much clearer.