Tension in and around your rib cage or diaphragm — the primary breathing muscle — constricts your lungs and limits the amount of air you can bring in. (mindbodygreen.com)
Firstly, diaphragmatic breathing can be effective to help open the nasal passages and get the most benefit from aromatherapy — the diaphragm is the most efficient breathing muscle and it sits right at the base of the lungs. (mindbodygreen.com)
Exercising good posture involves waking up the core breathing muscles. (naturalhealth365.com)