I was recently subjected to several chest x-rays, which elicited gasps of incredulity from those who interpret such things. Apparently, my lungs are extraordinarily long, reaching all the way down to my diaphragm, which is more than a little unusual.
The right lung, at first, was collapsed to around the size of an orange, which was far from good, although it soon resumed its oversized - or rather over-long - proportions, after a tedious and painful operation.
My past history of intense and prolonged deep-breathing, as part of do-or-die meditation, seems to have radically enlarged the organs, far beyond the reasonable. This, I can only surmise, is a rather questionable practice, since one starts out with only so much material, and like an inflated balloon, it becomes thinner and less substantial, the more it is inflated, requiring only a prick to produce disaster.
To this point, I would have wholeheartedly recommended deep meditation, to one and all, as beneficial in any number of ways. But in the light of recent experience, am more inclined to urge caution when subjecting one's lungs to long-term over-inflation, and to sustaining of that over-inflated state in pursuit of the lengthiest exhale possible.
In other words: don't try this at home. Unless you are capable of exercising restraint; something I historically have trouble with.
Now that I seem to have permanently damaged my lungs, would I do it differently, had I the opportunity to go back in time for another shot? Probably not. I rarely do anything by halves. The esoteric benefits far outweigh the damage done, if you discount death as being a bad thing.
But since nobody else is me, I deliver this caution, to advise other would-be Godlike-beings of the unexpected dangers that might lie ahead.
Live long and know little. Or burn like an arc-light, and go out like one.