I say prana is oxygen/food, and that’s all.
I know this is not orthodox Yogic thought and they will say I have misunderstood but I beg to differ.
Just think back to a time before it was understood that corporeal life was sustained by chemical processes at the cellular level and that these processes were dependent on oxygen/food and that the body could not produce this oxygen/food in sufficient quantities and therefore it had to be constantly brought in to the body.
What did they see then? They saw that people who did not breath/eat, died! That made the connection. They saw that life left the body when a person was unable to breath. They saw the “life force” go out of the body. Naturally they assumed that there was some form of “energy” or “life force” in the world that sustained life and that breathing was the means by which this life force entered the body. This was why breathing was vital.
They didn’t know about chemistry, they didn’t know WHY air and food were so vital so they invented the idea of prana.
Like oxygen prana is finite and must be constantly renewed, like oxygen it is essential for life and like oxygen life will cease in its’ absence. And if there were some non-physical “energy” or “life force” out there (outside of us) why would it need a physical medium such as air, to carry it. Why couldn’t it just pass through our skin, why wouldn’t it just flow through us like radio waves?!
I have been doing yoga for a long time and I understand the benefits of breathing deeply on a physical and psychological level. The oxygen nourishes the body while the depth of the breathing is an affirmation of the willingness to live, which strengthens the mind. I see no need to believe in “prana”.
It is disingenuous of anyone (yogis and followers alike) in this day and age for anyone to insist that there is something intangible in the air we breath or food we eat that sustains life, other than chemicals.
Yoga asanas do not need to be backed by mystical energies to give them validity.The benefits of yoga are not magical, they are based on sound knowledge (yoga successfully vitalises the body and does not injure you because it was perfected by trial and error over such a long time).