229. What if Your Tightness is Trying to Protect You?

June 16, 2026

That tight hamstring you’ve been stretching might be your nervous system asking for something else entirely.

When pain shows up in one place, the source is often somewhere else. Dr. Andrew Fix walks through a real patient case from Physio Room where a woman who was experiencing persistent pain in her hamstring had been doing what most people do: stretching it out and hoping mobility work would eventually help. The sciatic nerve originates from the lowest nerve roots of the lumbar spine, and when those roots get irritated, the nerve signals the hamstring to hold protective tension. What feels like tightness is the nervous system protecting itself. Stretching works against that response.

In many cases like this one, the root cause is a lack of spinal stability. Without adequate muscular control around the pelvis and lumbar spine, gravity loads the vertebral joints and compresses the nerve roots every time you sit or stand. Dr. Fix explains how positional testing revealed exactly this pattern: her hamstring tested pain-free lying down but reproduced symptoms seated. When she was cued to engage her deep core before repeating the painful test, symptoms dropped roughly 70% without a single hands-on intervention. The muscle was the same. The spinal load was not.

How often are people chasing mobility and flexibility when the real missing ingredient is stability and control? Dr. Fix makes the case for thorough assessment before any treatment begins, and offers a clear signal to watch for: if a practitioner skips the diagnostic work and goes straight to treating what you describe, it is worth getting a second opinion.

Quotes

“Nerves are like electrical cords. They don’t enjoy being tugged on.” (04:25 | Dr. Andrew Fix)
“Your body’s trying to have this protective mechanism, we’re trying to stretch and take it away, and we’re not necessarily helping ourselves out. We’re temporarily relieving symptoms, but we’re not addressing the real issue at hand.” (04:40 | Dr. Andrew Fix)
“When you have a lack of stability, what you cannot do is you cannot stretch it away. Because stretching doesn’t give you stability. Stability is like strength and control, your ability to control the joints and the tissues while you’re going through movement.” (05:20 | Dr. Andrew Fix)
“It hurts when there’s no stability being created for the spine. But it doesn’t hurt or doesn’t hurt nearly as much when we do create some stability for the spine.” (11:17 | Dr. Andrew Fix)
“They shouldn’t be just starting to treat something before they’ve really done a thorough assessment to know what they need to treat in the first place.” (13:54 | Dr. Andrew Fix)

Links

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