That makes the reference to evolutionary origins even more confusing, as I doubt our ancestors were ‘meditating’ while running prey to ground. If it is truly a survival thing, then running under stress inducing circumstances (hunger, competition, forced exercise etc) would be more in line with what Gorg the cave man was doing...

So what? The fact that something evolved for a reason doesn't mean that you have to do it for the same reason. Take outdoor camping, for instance. Our "ability to camp" evolved, because we had to survive in the wilderness. Yet, many people today do it (from time to time) for fun, not because we lived in the wild in the past.