The Missing Ingredient in Most Rehab Plans: Load Tolerance, Not Flexibility

By Andrew Kakishita, DC | Lehi, UT

Why Flexibility Alone Is Not Enough

Rehab often focuses heavily on stretching and mobility. While these are important, they do not always explain why pain persists or returns.

A more important factor is load tolerance.

Load tolerance is the amount of physical demand your body can handle before symptoms appear.

What Happens When Capacity Is Too Low

If your daily activities require more capacity than your body currently has, even slightly, the system will compensate.

This might show up as muscle overuse, altered movement patterns, or recurring discomfort.

For example, if your current capacity is 100 and your daily life demands 105, your body is constantly working at a deficit. It’ll recruit other muscles to “help,” resulting in compensation patterns and new muscles also being overworked.

Why Symptoms Keep Returning

In this scenario, even small tasks can feel like they overload the system. That is why symptoms often come and go without a clear “injury moment.”

The issue is not always damage. It is demand exceeding capacity.

Building Capacity Over Time

Rehab that focuses on gradually increasing tolerance helps shift this balance.

If capacity improves beyond daily demand, symptoms often decrease because the system no longer feels overwhelmed.

Using the same example, if capacity increases to 110 while demand stays at 105, the body now has room to function without triggering protective responses.

Flexibility vs Function

Flexibility can support movement, but it does not guarantee resilience. A system needs to tolerate load, not just move through range.

This is why strengthening, graded exposure, and consistent movement often play a larger role in long-term recovery.

Key Insight

Recovery is less about achieving perfect movement and more about building a system that can handle real life without constant overload.