Do's and Don'ts of keeping Your Lungs Healthy Breathing Retraining Normal Breathing Breathing is a multi-step process.
Inspiration starts with the contraction of the diaphragms.
The diaphragms are two dome-shaped, muscular structures located at the bottom of each of your lungs. By contracting, they pull the lungs down and create a vacuum which draws air into the lungs. When enough air is inhaled, the diaphragms stop contracting and the lungs deflate passively. There are additional muscles in the chest that can be recruited under certain conditions. Breathing with COPD People with COPD are not able to use their breathing muscles effectively.