I can't run.
I'll play ultimate frisbee for 2-3 hours straight, running most of the time, but going for a jog? Can't do it. Never could. Bores the hell out of me and hurts in strange ways that playing frisbee doesn't.
3 years ago I bought a pair of nice running shoes, and swore that I wouldn't put them on except to go running. They've sat unworn in the back of our closet since then.
This morning, I went for a run.
I wore those shoes.
Today a hard-fought 2/3 of a mile. Tomorrow... likely the same. But someday!