Lower Back Pain During Deadlifts: Cause, Fix, and How to Never Let It Happen Again

Lower back pain from deadlifting is one of the most common complaints I see in athletic populations. Most of the time it's not a serious injury — but it is a signal that something in the movement needs to change.

Deadlifts are one of the best exercises in existence for building posterior chain strength and overall athletic capacity. They're also one of the most commonly butchered movements in the gym — and the lower back pays the price.

Before anything else: acute, severe back pain after deadlifting — especially if accompanied by shooting pain down the leg, numbness, or weakness in the foot — needs a clinical evaluation before you do anything else. That's a different conversation from the typical low-grade, dull lower back soreness that shows up the day after pulling.

For the vast majority of deadlift-related lower back pain, there are three primary causes. Fix the cause, fix the pain.

Cause 1: Lumbar flexion under load (the classic "rounded back")

The lumbar spine is designed to be rigid during loaded hip hinge patterns. When the lower back rounds — lumbar flexion under load — the posterior structures of the spine (discs, ligaments, facet joints) are exposed to shear forces they're not designed to manage at high loads. This is the most common technical cause of deadlift-related lower back pain.

The fix begins before the bar moves. Brace your core aggressively before the pull — think 360-degree pressure, like you're about to take a punch. Pull the slack out of the bar before you lift it. Maintain a neutral lumbar curve through the full range. If your lower back rounds as the bar leaves the floor, the weight is too heavy for your current technique. Drop the load, own the pattern, then rebuild.

Cause 2: Hip mobility and setup problems

How you get into the starting position determines how the lift ends. Hips that sit too high relative to the bar create a stiff-leg pattern that overloads the lower back. Hips that sit too low create a squatting pattern that takes the hamstrings out of the movement entirely. The bar should be over mid-foot, shoulder blades over the bar, and hips positioned so the hamstrings are loaded — you should feel tension in the back of your legs in the setup, not your lower back.

Hip mobility restrictions — specifically limited hip flexion depth and internal rotation — prevent people from getting into proper position. Routine hip flexor stretching, 90/90 hip mobility work, and pigeon pose before heavy pulling sessions can significantly improve your ability to get into the right position.

Cause 3: Weak or non-firing glutes and hamstrings

The deadlift is a posterior chain movement. If the glutes and hamstrings aren't the primary movers, the lower back has to compensate. People who pull primarily with their lower back — you can see it when the hips rise faster than the bar — are setting up for chronic overload of the lumbar extensors.

Single-leg Romanian deadlifts, glute bridges, and Nordic hamstring curls are the accessory work that builds the posterior chain strength to support a healthy, back-safe pull. If you skip accessory work and only deadlift, you'll have strength gaps that eventually show up as pain.

The fix: a systematic approach

• –Deload temporarily: If you're pulling through active lower back pain, reduce load to something you can perform with perfect technique and no pain. Train through it correctly rather than avoiding it entirely.
• –Film your lift: Most people think their technique is better than it is. Film from the side and watch for lumbar rounding, early hip rise, and bar path. This is the fastest way to identify what's actually going wrong.
• –Rebuild from the hip hinge pattern: Romanian deadlifts and stiff-leg deadlifts train the hip hinge pattern with less compressive load than conventional deadlifts. Use these to groove technique and build hamstring strength before returning to heavy conventional pulling.
• –Prioritize glute and hamstring strength: Add dedicated posterior chain work. Single-leg RDLs, glute bridges, cable pull-throughs, and Nordic curls all build the capacity the lower back needs to be protected during heavy pulls.

When it's not the technique

If you've addressed all the technical issues and lower back pain persists, consider: disc irritation (particularly if pain radiates into the buttock or leg), facet joint irritation (more common with extension-loaded patterns), or SI joint dysfunction (pain localized to one side of the lower back near the sacrum). These warrant clinical evaluation rather than more technique tinkering.