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How Does Pain Cause Weak Muscles?

Everybody who has pain has some kind of muscle weakness. Why does this happen? Well, our brain is trying to protect our body. When we have pain the brain decreases muscle strength. All voluntary muscle contractions are controlled by our brain. All muscle pain messages that make their way to the brain trigger the brain to decrease muscle output. We don't notice weakness at first. The first thing we usually notice is pain. So, how can we tell if our pain is also causing muscle weakness?


Strength Testing


The best way to know if we have a muscle weakness is to be evaluated by a trained doctor, like the Doctors of Physical Therapy at Muscle IQ Physical Therapy. Muscle strength can be measured manually or with machines.


A woman being tested for right leg muscle strength
Manual Muscle Testing

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