If you spend enough time in the world of baseball pitching, you will probably hear from someone that actively pronating the forearm is imperative to protecting the pitching elbow. A reason often given is that pronating the forearm engages the pronator teres muscle.
The powerful pronator teres is a forearm muscle that attaches on the inside of the elbow (the medial side) near the ulnar collateral ligament (UCL). Its primary job is to pronate the forearm. When it is active, it generates a force that likely protects the UCL and therefore likely reduces the risk of Tommy John surgery.
Thus, some believe that if a pitcher actively pronates the forearm at just the right time, he or she will optimally engage pronator teres to protect the UCL. This is misleading.
The idea that one must pronate the forearm to utilize pronator teres is not actually true.
Yes, in general, it is true that one […]