But I had this theory, which I recently also heard again coming from a Vedantin. That of the 21,600 breaths in a day (with each breath of 4 seconds), as you reduce a few, you live longer.
Another aspect of breath as we know: If you breathe deeper, your mind is calmer. When you are in agitation, be it physical, mental or emotional, you breathe faster. If this prolongs in day, you exceed the 21,600 count and it reduces the life-span by that much. Which also holds up scientifically, where it's well-known that prolonged agitation of these aspects is bound to make us ill, which will obviously reduce life-span.
In the end, what we need is the primary awareness of life being a game, a dream in a forever cycle. So take the awareness of a witness while involved in Karma, fulfill your role and come out of this cycle.
So..let's breathe deep!