We can’t stay alive for a very long time without breathing. So obviously this actually is the most important element and there are many secrets too it.
It is said that breath is the bridge between the body and the mind. Regulate breath, and the body and mind will follow.
Diaphragmatic breathing or deep breathing is one of the most important foundation practices for health.
On inhalation, the diaphragm muscle contracts, and pulls downward, such that the ribs flare out slightly, and pulls the bottom of the lungs downward to bring in air. On exhalation, this releases and the air goes out. This is the way to maximize your oxygen intake. Sufficient Oxygen again keeps your body alkaline and healthy.
It is important to note that modern medicine has finally acknowledged that the breath is intimately connected to the autonomic nervous system and the mind. Even some hospitals and medical establishments are now willing to train people in breath regulation and diaphragmatic breathing.
We need to consciously practice diaphragmatic breathing. This involves a retraining program, and while another person can teach us how to do it, it is actually a self-training program. Nobody can do the actual awareness and training for us.
( I urge you to study breathing if you are really serious about your health, lots of the info in here is from http://www.swamij.com)