Remember also, the bar will not move until your body leverage is at its optimal position for the weight to move. That’s why set up is vital.
This. It seems like your starting with your hips too low.
Read this article https://www.T-Nation.com/training/deconstructing-the-deadlift
That statement isn’t always true. A person doesn’t necessarily have to be in their optimal position since they may not have the muscles to support that theoretical position. They just have to be strong enough to initiate the lift however they are positioned. We could have a misunderstanding here. Are you defining optimal position as his strongest position (the way he currently lifts) or one in which he gets better usage out of all muscle groups for his body structure?
I think the OP is intentionally starting low to get more leg drive but he doesn’t have the strength to start at the lower hip position.[/quote]
I mean when the weight is as high as he went at 525, the bar will not move up until the shoulders get squared up directly over top of the bar. Something will give out first if the positioning isn’t right before the weight will move.
Yeah, you’re right about that. The shoulders do end up over the bar for a true max.
I was referring more to his hip and back positioning as a result of his strengths and weaknesses. From my experience, weak hips will result in changing of the starting hip position depending on how heavy the weight is and that can cause inconsistent training of the quads, glutes, abs and upper back. A weakness in any of those muscle groups can cause the others to be overloaded.