The concept of the Prana is difficult to understand and even more difficult to explain.  What can be said with certainty is that: the breath can be used as a starting point to understand the rhythm of the Prana, and that Asanas are like a laboratory that provide opportunities for breath to be express naturally in many different ways. Our so-called ‘Pranayama‘ sessions are just explorative studies of the breath playing out in the embodiment of the body, mind, senses and emotions, often in supported positions.   These sessions are often a welcome break from active Asana classes, and often we tend to use this opportunity to relax physically, mentally and emotionally.  Many of us ‘zone out’ or even doze off.  Pranayama commencement needs a well rested body and a quiet mind, so relaxing is not a wrong way to start, and if we are physically or emotionally exhausted, it is important to rest.  However, it is to be remembered that Pranayama is an alert practice. sensitivity, curiosity and persistence is required to make any headway.  Sooner or later, one must learn to not just ‘enjoy’ theses sessions as extended relaxation sessions, but participate with vigour and sensitivity.