"Oh yeah. It's good to see what the place offers. When I'm not working with someone, I usually work with weights and the punching bags. They've got some nice heavy bags and speed bags... good for workin' out some frustration." If he sounds like he knows this from experience, it's because he does. Derek gets frustrated a lot in this place.
He pats a hand over the armrest. "But I guess running's your thing?"