The 4 Deadlift Mistakes That Cause Lower Back Pain (And the Exact Fixes for Each)

By Marcus Cole | Workout Answers

I’ve watched hundreds of lifters wince at the bottom of a deadlift, grab their lower back, and say some variation of: “I don’t know what’s wrong. I thought I was supposed to keep my spine neutral.”

They’re right that neutral spine matters. But knowing you need a neutral spine is like knowing you need to “eat healthy.” Technically true. Completely useless without specifics.

In my 12 years coaching, I’ve found that lower back pain during deadlifts almost always traces back to one of four specific form errors. Not vague things like “bad posture.” Concrete, fixable mistakes that you can diagnose right now and correct with the exact drills I’m about to show you.

This isn’t the generic “warm up and keep neutral” advice. This is coaching-depth diagnosis and the precise corrective work that actually fixes the problem.

The Deadlift Back Pain Reality

Before we go deeper: some lower back pain from deadlifting requires professional assessment. If you have sharp, shooting pain (especially with nerve symptoms), pain that wakes you up at night, or pain that doesn’t improve within 48 hours, see a physical therapist or sports doctor. We’ll talk about when that’s necessary at the end.

But the majority of deadlift-related lower back discomfort I see? It’s mechanical. It’s form. And it’s fixable today.

MISTAKE #1: Rounding Your Lower Back (Lumbar Flexion Under Load)

Why This Happens

This is the most common error, and I see it constantly in commercial gyms. The lifter’s lower back rounds forward as the bar leaves the floor—sometimes slightly, sometimes dramatically. Their spine shifts from neutral into flexion exactly when they’re under the most load.

Three reasons this happens:

1. Weak spinal erectors. Your erector spinae muscles aren’t strong enough to maintain lumbar extension against the load. They fatigue, and the spine collapses.

2. Starting with hips too low. They’re initiating the deadlift like a squat—knees deeply bent, hips dropped. This anterior pelvic tilt at the start forces your lower back to round as you drive the bar up.

3. Trying to “squat” the deadlift. Some lifters think the deadlift is a leg exercise. They focus on quad drive and bend their knees excessively. The moment they do, the bar moves away from their body (we’ll cover this in Mistake #3), and lumbar rounding follows.

How to Diagnose This in Yourself

Film yourself from the side. Watch your lower back from the moment the bar leaves the floor until midthigh. Does your lower back angle flatten or decrease? Does your pelvis tuck under? If either happens, you’re rounding.

It doesn’t have to be extreme to cause pain. Even a 10-degree shift into flexion under heavy load stresses your intervertebral discs and ligaments.

The Fix: Three-Part Corrective Approach

Part 1: Regress to the Romanian Deadlift

The Romanian deadlift (RDL) trains hip hinge mechanics without the complexity of pulling from the floor. More importantly, it forces you to maintain a neutral spine because the movement pattern doesn’t tolerate rounding—if you round, you immediately feel the hamstring and lower back strain.

Here’s how to use it:

Stand with feet hip-width apart, holding a barbell at hip height (or dumbbells at your sides)
Maintain a slight knee bend—no more than 15 degrees
Hinge at the hips by pushing your butt backward
Keep your chest up and your head neutral (look at eye level)
Lower until you feel a hamstring stretch or until your back rounds—whichever comes first
Drive your hips forward to return to standing
Prescription: 3 sets × 8 reps, 2-3 times per week, with lighter weight than you deadlift (50-60% of your deadlift max)

The RDL re-teaches your body that the deadlift is a hip hinge, not a squat. Do this for 2-3 weeks before returning to conventional deadlifts.

Part 2: Cat-Cow Spinal Awareness

Before you touch a barbell, your nervous system needs to remember what a neutral spine feels like. Cat-cow does this.

Get on hands and knees
In “cow” position: arch your lower back, chest up, gaze slightly upward
In “cat” position: round your spine, tuck your chin
Move slowly between the two, spending 1-2 seconds in each position
Then find the midpoint—that’s neutral spine
Hold that neutral position for 5 seconds
Prescription: 2 sets × 10 reps (back and forth counts as 1), daily

This drill teaches proprioception. You’re learning to feel neutral spine so your body can maintain it under load.

Part 3: “Push the Floor Away” Cue

When you return to deadlifts, use this cue at the start of every rep:

“Push the floor away with your legs, not pull the bar up with your back.”

This mentally reframes the lift. Instead of thinking about pulling (which engages your back excessively), you’re thinking about extension. Your glutes and quads drive the floor away, your back stays isometrically neutral, and the bar follows.

Start with 50% of your normal deadlift weight. Film yourself. Make sure your lower back stays neutral from floor to lockout. Add weight only when you maintain that position for 5 consecutive reps.

MISTAKE #2: Hyperextending at Lockout (Over-Arching Your Back)

Why This Happens

You’ve pulled the bar to hip height with a neutral spine—good. But then you lean back aggressively at the top, arching your lower back into extension. This is usually caused by two things:

1. Overcompensating. Lifters who’ve struggled with lower back rounding sometimes overcorrect. They think more arch = safer. It doesn’t. Hyperextension under load is just as stressful as flexion.

2. Trying to “lean back” for lockout. Some coaches cue “lock your hips”—which is correct—but lifters misinterpret this as leaning their entire torso backward. The hips lock, but the lumbar spine hyperextends in the process.

How to Diagnose This

Film your lockout from the side. At the top of your deadlift, your body should form a straight line from your ankles to your head. If you’re tilting your shoulders backward away from your hips, you’re hyperextending.

You might also feel: sharp lower back pain at the top of the lift, or a sensation of your lower back “pinching.”

The Fix: Two Cues + One Drill

Cue 1: “Glute Squeeze”

At the top of the deadlift, actively squeeze your glutes hard. This engages your posterior chain and tells your brain “we’ve locked the hips.” But it locks them using glute activation, not spinal hyperextension.

The glutes and spinal erectors work together. When glutes contract powerfully, they naturally limit excessive lumbar extension.

Cue 2: “Stand Tall, Don’t Lean Back”

Verbal cue during lockout: “Stand tall—like you’re standing in an elevator with the president.” This prevents the backward lean.

The Drill: Lockout Holds with Light Weight

Load the bar to 50% of your deadlift max
Pull to lockout
Hold for 3 seconds at the top while you actively squeeze your glutes
Your body should form a straight line from ankles to head
Lower under control
Prescription: 4 sets × 3 reps (with 3-second holds), twice per week

The light weight gives you freedom to focus on positioning. The 3-second hold gives you time to feel what neutral lockout actually feels like.

MISTAKE #3: Bar Drifting Away From Your Body

Why This Happens

The bar should travel in a vertical line (or very close to it) during a deadlift. When the bar drifts away from your body—especially at the knees—your lower back assumes more of the load and your mechanics break down.

This happens because:

1. Weak lats. Your lats are responsible for keeping the bar tight to your body. Weak lats = no “shelf” for the bar to stay against.

2. Not engaging your upper back. Related to lats, but distinct. You’re not actively “pulling” the bar toward you at the start of the lift.

3. Starting with hips too low. (Again!) Low hips force your knees forward. The bar must arc around your knees. Chaos ensues.

How to Diagnose This

Film yourself from the side. Draw an imaginary vertical line from the bar at floor level. Does the bar stay on that line, or does it move away from your body as it passes your knees?

If it drifts forward, your lower back is working overtime to maintain the lift. This is a major lower back pain culprit.

The Fix: Lat Engagement + Straight-Arm Pulldowns

Cue: “Bend the Bar Around Your Legs”

This is a game-changer. At the start of the lift, imagine you’re bending the bar around your legs—creating tension in your lats. You’re not actually bending the bar, but the *intention* to do so activates your lats and creates that tight, body-close bar path.

Here’s how to practice it:

Set up for a deadlift
Before you pull, imagine the bar is rubber and you’re bending it around your shins and thighs
This creates tension in your lats and shoulders
Now pull
Maintain that tension throughout the lift

Corrective Accessory: Straight-Arm Pulldowns

This isolates your lats and teaches them to work when loaded.

Stand facing a cable machine with the rope or bar set at head height
Grab with straight arms
Pull down to your hips while keeping arms relatively straight
You should feel lats working, not your arms
Prescription: 3 sets × 12-15 reps, twice per week

The Long-Sleeve Test

Here’s a simple diagnostic: wear a long-sleeve shirt and deadlift. Tighter sleeves will be tight against your side when the bar is close to your body. Looser sleeves at the knees = bar drifting. Use this real-time feedback to adjust.

MISTAKE #4: Jerking the Bar Off the Floor (No Slack Pull)

Why This Happens

You bend over, grip the bar, and immediately yank. No pause. No setup. This is impatience combined with a lack of understanding about tension.

When you jerk the bar without building tension first, two things happen:

1. Your spine isn’t braced. Your core and erectors haven’t had time to stabilize. The sudden load catches your spine unprepared.

2. You lose mechanical efficiency. Deadlifts are most efficient when every muscle is pre-tensioned. A jerky start wastes energy and increases spinal stress.

How to Diagnose This

Watch yourself in a mirror or video. Is there a visible “jerk” or sudden acceleration at the start? Do you pause at all before pulling? If not, you’re yanking.

You might also feel: unpredictable pain (sometimes bad, sometimes fine) or a “catching” sensation in your lower back.

The Fix: The “Slack Pull” and Three-Second Setup Ritual

Understanding the Slack Pull

The slack pull means: take the slack out of the bar before you actually begin the lift. Here’s what it looks like:

Set up with shins against the bar, shoulders over the bar, neutral spine
Grip the bar firmly
Take a deep breath into your belly
Pull slightly with your legs/back—*not a full pull*, just enough to remove any give in the bar
You should hear the bar settle on the plates. It’s quiet, no yanking
Once the slack is out, that’s your true starting position. Now pull with intent

The slack pull pre-tensions your entire body. Your nervous system is ready. Your spine is braced. The actual pull is smooth, not jerky.

The Three-Second Setup Ritual

Discipline matters here. Use this before every rep:

Second 1: Assume position (shins at bar, shoulders over bar)

Second 2: Breathe deep into belly, remove slack

Second 3: Engage full tension, pull

It takes 3 seconds. This small pause is the difference between chronic lower back pain and a healthy spine.

Wedging Drill

To practice slack pull mechanics specifically:

Load the bar to 50% of your max
Set up and perform a slack pull (no full pull yet)
Hold the tension position for 3 seconds
Lower the bar
Repeat 5 times, then do a full rep on the 6th rep
Prescription: 3 sets × 6 (5 tension holds + 1 full rep), once per week

This trains your nervous system to always build tension before loading.

Alternative Deadlift Variations If Conventional Causes Pain

Sometimes, despite perfect form, conventional deadlifts irritate someone’s lower back. This isn’t weakness—it’s often anthropometry (lever lengths). If you’ve fixed the four mistakes above and still have pain, try these:

Trap Bar Deadlift

The trap bar places handles