Would be interesting to hear what Fortress thinks.
Squat? Hmm, a lot of compression on lower back, does it make it stronger? Maybe not.
Deadlift? The lockout, pushing the hips FWD, does it make lower back stronger? Maybe not.
But then again, researchers are wrong every day of the week as well.
Training the area w/ assistance stuff like SLD's, hypers, reverse hypers, etc will though (like Captain Obvious mentions in the article).
Is that a Supinator in that article on that page?