you did misunderstand what i was trying to say, or i was phrasing it badly.
your deadlift is good, and there is nothing wrong with lifting mostly with your lower back.
but seriously man, great effort on a new max pr in the squat also, but compared to your deadlift, your squat sucks.
i never meant for him to squat the deadlift!
The thing is though that I am not lifting mostly with my lower back. My strength is off the floor and at mid shin, due to leg strength (quads and hamstrings). I have my hips fairly low for a conventional puller to take advantage of this. Watch the videos again and you’ll see that my speed off the floor carries me through the lift. When I get to the top and my back and glutes take over, I struggle. Notice how round my back is when I start to struggle. The strength is there in the glutes, but I think I am having trouble activating them, fixing this may be as simple as remembering to fire my glutes.
I think you are convusing your hip extensors with your back muscles. Your back has a fairly short range of motion and is moved primarily by your erectors. They are (or should be anyways) used mostly isometrically in the deadlift. Your glutes and hamstrings pull your pelvis (and therfore torso)up into a vertical position, this is where I am strong. When you lift with high hips (even straight legs), your glutes and hammies are still doing most of the moving, but more stress is placed on your back due to leverages. Notice that even when I fail, my pelvis is just about vertical, but it is at this point that I struggle with hip activation and back issues.
I’m not sure what you meant with your comment about my squat, I realize it is not up to par with my deadlift. I posted, however, hoping to get some constructive criticism, not just criticism.