I cycle as well as run.
I always try to behave as a road-using vehicle: the very few times I need to be on the pavement, I have one foot unclipped, and I try to not use shared-use cycle lanes, let alone the foot-path. The surfaces on these shared-use lanes are often shocking, and make them far more dangerous than the road, although I'm probably breaking the law by not using them.
This is a vehicle that regularly travels at more than 25mph. If I come off, in all likelihood I'm eating tarmac.
By behaving exactly like any other road using vehicle (and that includes claiming my space on the road), you make yourself predictable and don't annoy other road users. I have yet to see inconsiderate behaviour - I think partly because of this attitude. I would pass a runner in the road the same as I would pass any slow moving or static hazard.
I laugh at runners who use MP3 players in races (mostly in ignorance of the race briefing). Cyclists who wear them on the road are suicidal. They usually combine it with no helmet.