You deadlifted two days ago and your lower back is letting you know about it. Before anything else, one distinction matters more than the rest of this article combined — so let's make it first.
Ordinary muscle soreness is a dull, broad ache in muscles that worked, showing up a day or two after training and fading over a few days. The low back has muscles like anywhere else, and after deadlifts they can be sore like anywhere else. That's training.
Sharp or shooting pain is a different signal entirely. Pain that stabs, shoots down a leg, arrived suddenly mid-set, or makes ordinary movement guarded — that's a stop sign, not a training effect. No article diagnoses that, including this one: that's a conversation with a qualified professional, and going sooner beats going later. Pain gets priority over progress, every time.
What follows is about the first kind only.
When soreness is a report card
Here's the question worth asking even about garden-variety soreness: why is the low back the sorest muscle after every session?
The deadlift is designed to be powered by the glutes and hamstrings — the biggest engines you own — with the back working as a transmitter: holding one rigid shape so hip drive reaches the bar. When the training worked as designed, the day-after soreness shows up mostly in the back of your legs and your glutes. When the low back consistently takes top billing, that's a report card: somewhere in your pull, the back is doing lifting work instead of holding work.
The usual suspects, in order of likelihood: a hinge that's really a bend (spine flexing forward instead of hips traveling back, leaving the hamstrings unloaded); a bar drifting away from your legs, multiplying the leverage your back must resist; hips shooting up early so the back inherits the whole second half of the lift; or simply a load that outran your brace, letting the shape change under weight.
Notice the common thread — they're all pattern issues, and none of them are fixed by stretching harder afterward or gritting through more sessions. When form breaks down under load, the fix is less load and better patterning. The pattern is trained light, then loaded. That order isn't a beginner rule; it's the rule.
The drill — Hip-Hinge Dowel Drill
Rebuilding starts with zero pounds. Hold a dowel along your spine, touching the back of your head, your upper back, and your tailbone. Push your hips back until your hamstrings load — you should genuinely feel them stretch — then stand tall. If the dowel loses a contact point at any moment, your spine changed shape, and now you know exactly when in the movement it happens.
Do 2 sets of 10 before every session. Then pull well below your recent weights for a couple of weeks — kettlebell or empty bar is honestly ideal — insisting on hamstrings loading before the break, bar brushing your legs, one spine shape throughout. Let the plates return only as fast as the day-after soreness migrates from your lumbar to your hamstrings. That migration is the progress bar.
To find which suspect is yours, film a rep side-on: hip travel, back shape, and bar drift are all visible in one clip. That's exactly what CoachVision's AI coach measures from a phone video — its read on where your pull hands work to the back — so your rebuilding weeks target the actual cause instead of all four guesses. Sore is data. Read it, film it, fix it light.