Thanks for the advice. Originally dinged my back years ago (dumb teenager reading musclemags). Since then I've had 4 episodes where my back has spasmed (not much fun). Solution has been lots of physio, anti-inflammatories, muscle relaxants and a very slow return to exercise. I am paranoid about keeping my back arched and sticking to strict form. Nowadays I can squat and deadlift heavy. Last time I hurt my back was trying seated Good mornings (hence the interest in this post). I've done high rep unweighted reverse hypers - great pump - no pain. I'll move to weighted reverse hypers and hypers to build up the lower back and stick to Deadlifts, Squats and OL lift variants.
