2. Practice slowly during specific exercises, and feel that the breath is completely concentrated in the lungs from the nasal cavity to the throat. When the lungs feel dilated, keeping the chest still will force the diaphragm to sink and the abdomen to protrude outward; When exhaling, the abdomen is retracted, and the diaphragm is lifted upward, so that the abdomen is turbid and exhaled.
3. Every time you practice deep breathing, take a deep breath into the abdomen and pause for 1-2 seconds, then exhale and abdomen, with an average of about 5-6 times per minute. If it is only used for fitness, it is best to do it twice a day, each time 10 minutes.
4. The key to deep breathing is to master the "limit" amount. When inhaling, the chest stays still and the abdomen expands outward to the maximum extent. When exhaling, the abdomen contracts to the maximum extent and the chest remains motionless.
When you start to learn the deep breathing above, you should carefully experience the whole process of each inhalation-exhalation. You can put your hand on your abdomen to help you feel your abdomen fall together. After you practice skillfully, take your hands off and practice with your own consciousness.