I cannot do TB DL's anymore. The pull on my upper body, makes me move at the L5 and causes me alot of pain. I have to be very selective. Most people with this disorder are alot less functional than I am.
I can do Squats with a ball up against a wall and I am fine. I can even do the hip stuff etc, but anything that consists of carrying anything with my upper body, is a no-go. I can do curls seated and standing, but when standing I have to keep the knees bent and maintain PERFECT form. No overhead pressing etc. I can use a hip sled with no issues as well.