There are thousands of songs with running in the title, but most most of them aren't really about running. More about fleeing - running from commitment, running from danger, running for the hills...
But Fugazi's post-hardcore anthem Long Distance Runner, from their 1995 album 'Red Medicine', sounds like it was written by someone who knows what they're talking about. Not sure who in Fugazi was a runner, but pretty sure somebody must have been. I guess you could draw a link between songwriter Ian MacKaye's straight edge philosophy (no drink, no drugs) and a hardcore fitness regime. The opening line of this song would make a great name for a running blog, if anyone fancies starting another one!
The farther I go the less I know
One foot goes in front of the other
It all boils around to not hanging around
To keep moving in front of the gravity
The answer is there the answer is there
but there is not a fixed position
It keeps moving along so I keep coming along
and that's why I'm a long distance runner
and if I stop to catch my breath
I might catch a piece of death
I can't keep your pace if I want to finish this race
My fight's not with it
It's with the gravity
Long distance runner