Breathing is one of the key factors in asana
. 
The key is that whether the breathing is correct or not will directly affect the effect of postural practice
.
One of the reasons is that it is useless to only focus on breathing, because breathing is not only the manifestation of our vital signs, but also the epitome of our whole living habits
.
Therefore, effective energy exchange between every breath is an important lesson in practicing yoga
.
But this is a comprehensive practice process, not an end
.
If you only focus on breathing, practice will stop..
.
