This area also contains muscles, blood vessels, and nerves that support and protect these organs. Problems with organs or supporting structures in or around the left rib cage region can contribute ...

your primary respiratory muscle that runs from your rib cage to your lumbar spine. Together, these muscles form a fundamental support system, enabling nearly every move you make and every breath ...

That means letting the diaphragm — the large, thin muscle just below the rib cage — do the work of drawing air into the lungs and letting it out. It's known as diaphragmatic or belly breathing ...