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Here is the bottom line: most people don’t breath properly. And, if you're ever at the top of a mountain there isn't much oxygen. This shouldn’t come as a big surprise. After all we never went to “breathing class.” Most people breath rather shallowly. That is they only fill about one third of their lungs with air on each breath. Obviously if you can pull in more air, and more oxygen, you can perform better and feel better. The best type of breathing brings, in one breath, air fully down into your lungs past your rib cage and fully up to the top where you can feel your upper chest rise.
Clavical
Breathe into the top third of your lungs.
Intercostal
Breathe into the top two-thirds of your lungs (between the ribs)
Diaphramatic
Breathe all the way down to fill your lungs past your rib cage.
There is actually a paradox in breathing because when you breath in you create expansion in your lungs through contraction of muscles (the diaphragm).
Your right and left lung feature fissures which divide the overall structures into smaller lobes. The left lung (the body's left, the viewer's right) has one horizontal fissure which divides it into two lobes (upper and lower). The right lung has one horizontal fissure and one oblique fissure, dividing the right lung into three lobes (upper, middle, and lower). Because of this third lobe, the right lung is larger than the left, extending further down in the abdominal cavity.
