Are there any lyrics that really say exactly the right thing, the thing you need to hear while you're running? I have a few:
"God it's so painful, something that's so close, and still so far out of reach" (Tom Petty, American Girl). This is one when I want to get to a particular distance and I just can't do it!
"If you're goin' through hell keep on going Don't slow down if you're scared don't show it You might get out before the devil even knows you're there. But the good news is there's angels everywhere out on the street Holdin' out a hand to pull you back up on your feet" (If You're Going Through Hell, Rodney Atkins).
This forum are those angels for me, by the way!
And finally, there's a song back in the C25k podcast, the one with Laura as coach, around week 7 or so, that says something like "I just want to get out" or something like that. I think it's about a guy who wants to get out of a relationship, but I heard it for the first time when most of the world was in lockdown and it just seemed really funny to me, cuz EVERYONE just wanted to get out!!