1. intercostal - Noun
2. intercostal - Adjective
Between the ribs; pertaining to, or produced by, the parts between the ribs; as, intercostal respiration, in which the chest is alternately enlarged and contracted by the intercostal muscles.
Source: Webster's dictionaryintercostal muscles Source: Internet
An exhalation results when the diaphragm and intercostal muscles relax, and elastic recoil of the rib cage and lungs expels the air. Source: Internet
Breathing involves so many muscles: intercostal muscles, abdomen, and diaphragm (this is where tension will come through as your enemy). Source: Internet
Drs. Rouse and Wodziak describe a hiccup as an involuntary, spasmodic contraction of the diaphragm and sometimes the intercostal muscles (tiny muscles between the ribs). Source: Internet
Yoga pro Baron Baptiste agrees that men tend to suffer from tightness in the hips and hamstrings, and in the shoulders and intercostal muscles around the rib cage, as well. Source: Internet
So you use the intercostal muscles, the muscles between your ribs, to bring air in and out of your lungs just by expanding and contracting your rib cage. Source: Internet