I read in a book on kundalini few days back that breath is directly related to which chakra we are currently functioning.
A person functioning in the visuddha chakra for example - the book says the out breath moves no longer than an inch approximately in a natural way and a yoga practitioner who has reached this stage experiences immense clarity of mind and calmness. Breath is extremely rhythmic at this stage.
I might have been in state briefly during my meditations in the past but this state must become of second nature (natural) that's my goal.