When I say western perspective I'm talking about the words I'm using not some different world... i.e. "cells need nutrition" ... but in meditation I feel a lot of the progress is changing your understanding of what it means to breathe. I kept (unwillingly) redefining the word until it had essentially became synonymous with the concept of "running lines of energy" (to whichever body part I wish to breath into).

Ultimately these words (prana, life energy, qi) are just metaphors to assist you with your own bodily awareness (so they are subjective) and maybe if you are some expert these metaphors can work for deciphering the body of someone else but trying to relate them to some object is not going to work. What I wish to say is that I don't consider these concepts to be objective truths in the same way I don't consider stories to be objective truths. However it does not impede my ability to learn from them.

Objective science is great for physics and is constantly improving our understanding of the human body as a machine but as individuals living in these machines we must also conduct our own subjective science, experimenting with our behavior to find how best to care for our unique body, mind and soul (a dubious concept at best but I like the rhythm of naming all three).

There is no "subjective science". I am very passionate about science and have a problem with anyone trying to construe something that is not science as science. Science is evidence based reasoning. Anything else is not science, call it whatever you want.