PRONATOR TERES IN THE THROWING ARM
The Pronator has 2 insertions on the inside of the elbow
1) To the Medial Epicondyle through the Common Flexor Tendon
2) To the medial portion of the Ulna (Deep)
In 83% of arms, the Median Nerve Runs right between those two heads
Due to throwers commonly having hypertrophied and toned up Pronators, this can become an issue with compression of the Median Nerve which runs down the forearm and into the thumb, index, and middle fingers
When tight, it can limit Supination and Elbow extension
With Pronation and Supination, it is important to test both Range of Motion and Strength in both the Elbow flexed and extended positions as this will affect the muscle lengths of each
Trigger points here typically refer deep into the wrist and Anterior Forearm
In chronically “tight” Pronators, check the opposing muscle groups (Supinator and Biceps) as you may find they are significantly restricted and essentially forcing the Pronator to “Drive with the E Brake on” with every contraction
OR
You may see excessive weakness that allows the Pronator to Bully it into living in the Pronated, shortened position
This is a non exhaustive list of some quick nuggets in regards to the Pronator Teres as there are a ton of global and external issues that can play a huge factor here
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