Today, in most fitness programs taught around the world, deep breathing is practically ignored. This is a major mistake as, to me your breath is your power. You can tell a lot about a person simply by observing how he or she breathes. In fact, I believe you can map out the structure of how the person lives life.
'The ancient samurai was accustomed to going out into the open air as soon as he rose in the morning. There he devoted at least 10 or 15 minutes to continued deep breathing, standing with his hands on his hips in order that he might feel the play of his muscles.'
Shallow breathers tend to be interested the shallow. Deep breathers tend to be interested in deep stuff. In Systema, the breathing practices are comprehensive and front and centre if each and every classes taught at FightClub.