For the main space discussion
The Wikipedia pageLung-gom-pa currently redirects to this article. I suggest we do it the other way around, as in the Milarepa biography it is a minor detail that is not regarded by the authors as a significante event in Milarepa's life, just a detail mentioned in passing.
So, something like this
Amongst other attainments the biography says he was able to master [[Lung-gom-pa] or long distance running by a series of bounds rather than in the conventional method used by modern runners. It is said to allow a practitioner to run at an extraordinary speed for days without stopping[cites].