Long story....I'm about 6'1", 250lbs, 20% bodyfat (little fat sorry)...I've been lifting seriously for years.
Best bench about 350, squat 315 for reps with good form...
I have a very weak lower back. Hurt it originally in football in highschool. Hurt it again rounding back during squat in college. Went to a doctor he said something like (wish I could remember) "you have a genetic deficiency which is going to always cause you to have a weak lower back". Something about the bones being unable to support muscle growth. It might have been spondlothesis...not sure. He said weightlifting was out.
Another doctor years later said my back was fine and seemed confused as to the previous diagnosis.
I can deadlift maybe 200 pounds. I'll do sets of 10 with 135 and that seems to take alot out of my lower back. I can do more if I keep my hips really low...but I'm trying to see if I can strengthen my lower back.
Form: I'm a little hazy on form, but I do stiff legged (straight legs...hips even with shoulders) and regular (shoulders higher)...and always keep my back arched.
Have any of you ever heard of someone being somehow unable to improve in the DL due to a muscular/skeletor weakness?
I do do goodmornings, but with really light weight (45/65 pounds). This stretches things and helps me warm up for squats more than anything else.
I don't have access to a reverse hyperextension maching. I'm not even really sure what it does.
Thanks for any advice.