Myth Buster: Does “Core Weakness” Really Cause Low Back Pain?
One of the most common things people hear when dealing with low back pain is: “your core is weak.” While this idea has been widely accepted for years, it’s an oversimplification and is often misleading.
Where Did This Idea Come From
Earlier research identified a correlation between low back pain and delayed activation of the deep core muscle known as the transverse abdominis. From this, the assumption became that poor core function causes back pain.
But here’s the key point: correlation does not equal causation.
What many of these studies didn’t fully account for is something called muscular inhibition. When the body is in pain or perceives a threat, certain muscles may not fire as efficiently. In other words, the altered muscle activity could be a result of pain and not the cause of it.
What Actually Contributes to Low Back Pain?
Low back pain is rarely caused by a single factor. Instead, it’s typically multifactorial, meaning multiple variables play a role.
Some common contributors include:
Sudden increases in activity or load (doing more than your body is prepared for)
Repetitive stress over time
Prolonged positions (like sitting for long periods)
General deconditioning or lack of movement variability
Poor sleep, stress, and recovery
It’s less about having a “weak core” and more about a mismatch between what your body is asked to do and what it’s prepared to handle.
Low Back Pain Is Common and Often Not Dangerous
Most people will experience low back pain at some point in their lives. In many cases, it’s not a sign of serious damage, but rather a temporary sensitivity of the system.
The biggest mistake people make? Catastrophizing the pain.
When we immediately assume the worst, like: “My back is messed up,” or “I shouldn’t move,” we often make the situation worse by avoiding activity altogether.
What You Should Do Instead?
In most cases, the goal is to keep moving within reason..
Some simple, effective strategies include:
Light walking or easy cardio to promote blood flow
Gentle stretching to reduce stiffness
Gradually returning to normal movement patterns
Avoiding prolonged inactivity or bed rest
Movement helps maintain mobility, reduces fear of movement (kinesiophobia), and supports the body’s natural recovery processes.
The Bottom Line
Core strength is important, but it’s not the sole driver of low back health.
Rather than focusing on “fixing a weak core,” it’s more productive to:
Build overall strength and capacity
Stay active and consistent
Gradually expose your body to different movements and loads
If your low back pain is persistent or limiting your activity, a more individualized approach can help identify what you specifically need.
At Power-Up Physical Therapy in Denver, CO, we help active adults and fitness enthusiasts move beyond the pain and build resilience—without fear-based approaches or one-size-fits-all solutions.
