Well, I'm a former journalist in RL and I tried to do some web research for you. There are many references to "limited practice" but no concrete definition that I could find.But reading between the lines it seems to mean that you wear the red "no contact" jersey and can run through plays, but your teammates aren't allowed to jack you up. So you get reps on how the play is designed, but your gimpiness is spared the punishment."Running on the side" and "solo workouts" seem to be in their own category and come up more often with with players who are rehabbing. From what I've seen a player who does some running on the side isn't really practicing but is trying to get better. As I said: this is pieced together. If someone has a link to something more definitive I'd love to see it.