You either lift with back, or lift with hips. The reason your back breaks is the hips are to tight, so the back does the work.
A wider stance with toes pointed out puts more weight on the hips, so use that for disc problems. For better leg development, the stance should be narrower, and toes 15' max outward. Therein lies the diff between power lifting and body building.
OR: Have wife kneel on your but, not on the tailbone! and wiggle around. Its a great thigh abductor exercise for her too!
Lastly, sit on a baseball on the hard spots in the gluts.
(Also great for dispersing those AAS shots that are stuck as little balls in your ass.)
Guys, this is a game changer for anyone with a bad back.Even after failed back surgery, it still works. Docs forget that the hips need to move to stop the pain!