I often use the phrase "sneak in a run" when I'm trying to find time to exercise in a busy day when my other obligations might make getting a run in difficult.
It's a bit of verbal trickery, as if I can convince myself that a run is like a cookie or a beer, something to be enjoyed on the sly, a guilty pleasure.
If you're wondering, it really doesn't work. But I keep trying.
Today hopefully I can sneak in a run during lunch.