“Why Does My Back Keep ‘Going Out’?”
If you’ve ever said:
- “My back keeps going out.”
- “I bent to pick up something light and bam, my back seized.”
- “I get better… then it comes right back again.”
…there’s a good chance your multifidus muscle is part of the story.
Most people have never heard of the multifidus. You don’t see it in the mirror. You don’t feel it like you do with your abs or glutes. But this deep stabilizer muscle is one of the most important protectors of your spine. When it stops working properly, your back becomes vulnerable to recurrent pain, flare-ups, and “mysterious” episodes.
Our goal at Vertrae® is not just to fix a flare-up, but to help you understand why it keeps happening and what we can do about it. This guide explains what multifidus dysfunction is, why it happens, and how Vertrae® approaches it in real patients.
Quick answers:
- Multifidus dysfunction is when a deep spinal stabilizer “shuts down” after pain or injury and doesn’t restart automatically (Hides et al., 1995).
- This can create micro-instability, making backs that “go out” repeatedly, even with light movement.
- Generic core strengthening can miss the problem because multifidus often needs motor control retraining, not just strength.
- The most effective plans combine: targeted rehab + movement education + treatment of the real pain generator (disc, Modic/BVN, facet, SI, etc.).
“Many recurrent back flare-ups aren’t weakness; they’re mis-coordination, driven by a stabilizer muscle that went offline after injury.”
What is the multifidus, and why is it so important?
Think of your spine like a stack of blocks. You don’t just want it strong. You want it steady. That’s what the multifidus helps do.
The multifidus is a deep muscle that runs segment by segment along your spine. Its job is to provide precision stability, the kind you need when you twist, reach, lift, bend, or shift your weight.
When it’s working well, most people don’t notice it. They just feel… stable.
But when it’s not firing correctly, the spine can feel like it’s operating without its “quiet stabilizer.” That’s when patients describe feeling:
- fragile
- guarded
- stiff
- nervous about certain movements
- prone to flare-ups that seem to come out of nowhere
When it’s off, you can feel like anything could set you off.
Why the multifidus often “shuts off” after injury
One of the most important things we explain in the clinic is this:
After pain or injury, your nervous system goes into protective mode fast.
That’s not a bad thing. It’s actually a normal survival response. But sometimes the nervous system protects you so well that it changes how your muscles fire. The multifidus is one of the most common muscles to “go quiet” after back pain.
This can happen after:
- a strain or sprain
- a disc flare or herniation
- nerve irritation
- endplate inflammation / vertebrogenic pain (Modic/BVN patterns)
- surgery or trauma
At Vertrae® we often put it in simple terms:
“Your body learns protection quickly.
Sometimes it protects you so well that it forgets how to stabilize normally again.”
So, you start feeling better…
But that deeper stabilizer stays offline.
And that’s when people say, “I healed… but my back never felt the same.”
The two-way relationship: multifidus ↔ discs/endplates (Modic/BVN)
Multifidus dysfunction usually doesn’t live alone. In real patients, it often co-occurs with other spine issues, such as disc changes, Modic changes, endplate irritation, facet overload, guarding, and altered movement.
Here’s the cycle we see:
Pain/inflammation → multifidus shuts down → spine gets less stable → more overload → more flare-ups
That’s why someone can do “everything right”, rest, meds, stretching, maybe even PT, and still feel like they’re stuck on a roller coaster.
The goal isn’t just symptom relief.
The goal is to break the cycle.
Why small movements can trigger big flare-ups
This is one of the most validating “aha moments” for patients.
When the multifidus isn’t doing its job, your body tries to compensate using bigger muscles: back muscles, hip flexors, hamstrings, and superficial core. Those muscles can generate force, but they aren’t as precise.
So, you’re functioning on a backup system.
That’s why the “trigger” is often something small:
- twisting for laundry
- bending to tie a shoe
- reaching into the car
- lifting something light
It’s not that your spine is weak everywhere.
It’s that the stabilizer that protects you during small transitions isn’t coordinating when it needs to.
Why “core strengthening” can still leave you feeling unstable
This is where so many good, motivated patients get discouraged.
They’ve done planks. Bridges. Crunches. Back extensions. Gym programs.
They’re stronger.
And yet they still don’t trust their back.
That’s because multifidus dysfunction isn’t only a strength issue. It’s often a timing and coordination issue. If the multifidus doesn’t kick on at the right moment, even a strong body can still move with poor segmental control, and flare-ups can keep happening.
Patients say it perfectly:
“I’ve worked so hard… and I still feel like my back might go out.”
That doesn’t mean you failed.
It means the plan didn’t fully match the problem.
What Actually Works: Retraining, Not Just Strengthening
This is where targeted, spine-specific physical therapy makes a difference.
Motor control training focuses less on how strong you are and more on how your stabilizers coordinate automatically (Saragiotto et al., 2016). It often starts gently. Sometimes it feels almost too simple. But that is intentional.
The goal isn’t to push through pain or brace harder. It’s to retrain the nervous system to stabilize at the right time, control movement segment by segment, reduce unnecessary guarding, and restore confidence in motion.
As Jen often explains to patients:
“We’re not just making you stronger. We’re teaching your body how to stabilize automatically again, so you’re not bracing for flare-ups all day.”
Importantly, programs that emphasize specific stabilization and motor control have been shown to reduce long-term recurrence after an initial episode of low back pain (Hides et al., 2001). A well-designed multifidus-focused program builds gradually and connects exercises to real-life movements, not isolated or random drills.
When advanced options should be considered
For many people, the right kind of physical therapy is enough to get the multifidus working again and break the cycle of flare-ups. But sometimes, despite real effort and high-quality rehab, the problem runs deeper.
We tend to see this when back pain has been lingering for a year or longer, when an MRI shows clear multifidus atrophy or fatty infiltration, or when several issues are stacking up, such as disc degeneration, Modic changes, facet or SI joint stress. In those situations, patients often tell us the same thing: “I’m doing all the right things, but my back still doesn’t feel reliable.”
That’s when we step back and look at the whole system.
At Vertrae®, the conversation shifts from simply calming pain to restoring stability. That may mean addressing the main pain generator first, whether that’s a disc, the endplates, a facet joint, or the SI joint, and then pairing that treatment with targeted rehab. In select cases, we also discuss newer, motion-preserving therapies designed to help the multifidus re-engage when it hasn’t been able to restart on its own (RESTORE Trial Investigators, 2024).
The key shift is this:
We’re not just chasing pain. We’re restoring the system that protects your spine.
When should you be evaluated?
Consider seeing a spine specialist if:
- Your back pain comes in recurrent episodes
- Small movements trigger big flare-ups
- You feel fragile or “about to go out”
- Symptoms persist beyond 6–12 weeks (even if they come and go)
- You’ve tried core strengthening but still don’t feel stable
- Your MRI mentions disc degeneration, Modic changes, or muscle atrophy
You don’t have to know whether it’s multifidus, disc, BVN, or all three.
That’s our job.
Your job is simply to say: “This keeps happening, and I’m ready for a real explanation and a real plan.”
Final Thoughts: Your Back Isn’t Weak. It’s Out of Sync.
One of the most hopeful things we share with patients at Vertrae® is this:
Your spine isn’t failing.
Your system is simply out of sync, and coordination is something we can restore.
If your back keeps “going out” and you’re stuck in a cycle of short-term relief, it’s time for real answers.
We help you understand why it keeps happening, and more importantly, what to do about it.
At Vertrae®, our Dayton-based spine specialists go beyond generic core exercises. We design care plans that rebuild your spine’s stability from the inside out, so you can move with trust, not tension.
Vertrae® | Let’s Get You Back on Track!
References
Hides, J. A., Richardson, C. A., & Jull, G. A. (1995). Multifidus muscle recovery is not automatic after resolution of acute, first-episode low back pain. Spine, 20(1), 54–58.
Hides, J. A., Jull, G. A., Richardson, C. A. (2001). Long-term effects of specific stabilizing exercises for first-episode low back pain. Spine, 26(11), E243–E248.
RESTORE Trial Investigators. (2024). Restorative neurostimulation therapy compared to optimal medical management for chronic low back pain associated with multifidus dysfunction: Outcomes from a randomized controlled trial. Pain and Therapy. https://doi.org/10.1007/s40122-024-00689-0
Saragiotto, B. T., Maher, C. G., Yamato, T. P., et al. (2016). Motor control exercise for chronic non-specific low-back pain. Cochrane Database of Systematic Reviews.
