So, I'm definitely bending my lower back during a deadlift

Yeah, by snapping your spine.

Accidents only have to happen once kiddo.

>>42697609
Is there a way to decrease lower back rounding without deloading?

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>>42697622
Straighten your back ? I'm surprised you've gotten to 5 plates without learning the athletic stance it's the basis most exercises

Also just take one session to deload then work back up with proper form it's better to do that than to tempt fate by ego lifting

>>42697622
your back is too strong for your legs. your legs can't lift the weight so the lower back has to do sone of the work
get your squat and sldl up
but best would be a deload

Post video of form if you can. Very minor bending is fine but it's a thin line.

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>>42697593
Stuart McGill's research has demonstrated that there are two types of spines and it can't be both. You either have a thin spine that is very tolerant of twisiting and flexion movement exercises (do crunches not bother you?) but will wear out quicker from large compressive forces (eg deadlift) or you have a thick spine that can tolerate compressive forces well as the trabecular bone adapts over time making heavy loads safer but twisting/bending motion can snap your shit up (do crunches hurt?).

A spine bend, if you have a thick spine, could be fine if you're ok because you'll eventually adapt so long as you don't start bending under load but begin bending before lifting and remain in a fixed bend through the lift.

A neutral spine is best but depending on your spine type and ensuing disc shape you may well adapt to deadlifting with a flexed moment spine.