Pain is Relative

So after I took Justin out for a run again this morning, he was commenting on how painful it is to get back into running after having taken so long off. We can all understand his point -- but then he made an interesting observation:

Justin: I can see why you all run with injuries.
Me: Because it's so hard to get going again after a rest?
J: No. It's because you all are so used to ignoring pain, you can't distinguish one pain from another.

Touche.