A good exercise for back prehab and rehab I haven't seen mentioned is reverse hyperextensions. Some nice gyms have the machine. Otherwise, you can jimmy the movement yourself using a yoga ball or bench. I'd recommend doing several high rep bodyweight sets throughout the week.
Here's a video that shows it. I think the exercise is as effective with hand contact vs. forearm, but both variations work.
Here's a video that shows it. I think the exercise is as effective with hand contact vs. forearm, but both variations work.