Why Does My Lower Back Hurt After Deadlifts (Even With Good Form)?
Form looks fine on video but your lower back is wrecked the next day? Here are the five usual causes, how to tell soreness from real pain, and a 2-week 80% reset.
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Pasha Mor
Founder, 1RM.fit · October 5, 2026
This is one of the most common questions I see in gym forums: "My form looks fine on video, so why does my lower back feel wrecked the day after deadlifts?" The honest answer is that "good form" on video and a well-braced, well-loaded spine are not the same thing.
I'm Pasha, founder of 1RM.fit. I've answered this question dozens of times, and the cause is almost never one dramatic mistake. It is usually a small pattern repeated across many sets. Here is how I diagnose it.
Soreness vs Pain: Know Which One You Have
Dull, diffuse muscle soreness across the lower back that peaks 24 to 48 hours after training and eases with movement is normal. Your erectors work hard in every pull, and a new stimulus will make them sore.
Sharp, localized, pinching pain, pain that shoots into the buttock or leg, numbness, tingling, or pain that gets worse day by day is different. Stop pulling and see a physiotherapist or doctor. Nothing in this article replaces a proper assessment, and no PR is worth guessing about nerve symptoms.
Cause 1: Your Brace Is Weaker Than Your Form Looks
A flat back on camera does not prove a braced trunk. If you take a shallow chest breath and let your ribs flare, your spine can look neutral at the start of the pull and still lose tension under load. The fix is to breathe into your belly and sides, push your abs out against a belt or your own tension, and lock that pressure in before the bar leaves the floor. Our deadlift form guide covers the full setup. Test it: if your stomach pokes in during the pull, or you feel your ribs rise, the brace is the issue.
Cause 2: The Bar Drifts Away From Your Shins
Every centimeter the bar sits in front of your mid-foot lengthens the lever your lower back has to resist. Look for a bar path that is not a straight vertical line, or a bar that rolls forward as you start the pull. Fix it by setting the bar over mid-foot, pulling the slack out of the bar, and thinking "drag it up your legs."
Cause 3: Your Hips Shoot Up Early
If your hips rise faster than your shoulders off the floor, the lift turns into a stiff-leg pull where the lower back does the work your legs should share. On video it shows as a hip angle that opens before the bar moves much. Cue "push the floor away" and keep your chest up. Dropping the weight 10 to 15% for a few sessions usually exposes this fast.
Bar over mid-foot, ribs down, hips and shoulders rising together.
Cause 4: A Sudden Volume Jump
This is the most overlooked cause. Going from one heavy set of 5 per week to 5 sets, adding a second deadlift day, or stacking RDLs on top will overload tissue that has not adapted yet. Your technique may be identical and your back still sore, because the load simply outpaced recovery. Keep weekly increases modest and follow the principles in our progressive overload guide.
Cause 5: Glutes and Hamstrings Are Not Doing Their Share
When your hips and hamstrings are under-involved, your lower back becomes the prime mover. Signs: you feel pulls only in your back and barely in your glutes, and your lockout is weak. Build the posterior chain directly with the Romanian deadlift and the hip thrust, and squeeze your glutes to finish each rep instead of leaning back. You can also compare against the standard barbell deadlift technique page.
How to Film and Self-Diagnose
Film from the side at hip height, about 2 to 3 meters away, so the full bar path is in frame.
Record a warm-up set and your heaviest work set. Compare them. Form often breaks only at the top end.
Watch for the bar leaving the shins, hips rising before the bar, and your lower back rounding at the start of the pull.
Pause the first 10 cm of the lift frame by frame. Most errors happen there.
Note how the last rep looks versus the first. A big drop-off means the set was too heavy or too long.
The 2-Week 80% Reset Protocol
If your back is sore but not painful, run this before you assume something is broken:
Week 1: Deadlift once, at about 80% of your recent top working weight, for 3 sets of 5, stopping 2 reps short of failure. Use a 3 second pause at knee height to practice position.
Week 2: Same weight, 4 sets of 4. Add Romanian deadlifts or hip thrusts for 2 sets of 8 to 10, light to moderate.
Throughout: Film every top set, brace hard, and skip any rep where the bar drifts or your hips jump.
After: Add 2.5 kg per session until you are back at your old weight. If soreness returns at the same weight, see a professional.
Not sure what 80% is? Plug a recent set into the 1RM calculator and take 80% of the estimate. If your estimated max is 150 kg, you work at 120 kg.
Track It So You Can See the Pattern
The reason back soreness is hard to diagnose is that most people do not remember how much they pulled last month. I built 1RM.fit as a free workout tracker so you can see your weekly deadlift volume, spot the jump that preceded the pain, and ramp back up deliberately. It will not fix your form, but it will show you the numbers that explain it.
