Pronation timed appropriately is extremely important especially for someone who has undergone a reconstruction. Our bodies are hardwired to move certain ways based on physiology, joint orientation, posture, neuromuscular tone, genetics, hyper or hypomobility, etc. etc.  Over supination or supination maintained too late in the throwing motion is often catastrophic for throwing athletes. The only absolute in throwing mechanics is that once you start a throw you almost always end up finishing a throw. Excessive supination in the throwing motion will tell the brain that the throw needs to happen earlier which alters upper extremity sequencing, fulcruming, and positions the elbow in a less stable configuration.The most important component for a Tommy John reconstruction is to avoid excessive tensile load or direct valgus stress to the elbow in an unstable position. This can only happen if appropriate lever arm positioning deflects the valgus stress to the elbow and elbows the secondary protective mechanisms to be maximized. Often over supination too late in the throwing motion leads to poor positioning of the glenohumeral joint which limits the elbow’s ability to tolerate stress. I’ve treated hundreds of shoulder and elbow injuries that may or may not have happened because someone told them they needed to be supinated at the exact moment they needed to be pronated.

2 Responses to The Importance of Pronation in Pitching
  1. I appreciate your blog post about the importance of pronation. There is a lot of misinformation out there in the baseball world from some very well intentioned coaches and medical professionals. I include the medical pro’s because I am one and have worked with one of the largest medical systems in the country to help educate the physicans and therapists as to the inportance of functionally understanding the throwing athlete. I’m now also the Great Lakes Area Director for the National Pitching Association which derives 100% of it’s information from science based and medically defendable information. Pronation is a naturally occurring reaction that happens after the release of the baseball. The small muscles of the wrist and forearm just can’t be asked to be the primary movers in the throwing process because the speed generated from the larger muscles is just too much for them to play catch up to. So for a coach to introduce them as such, it would take away from the ground force production and proper kinematic sequencing that happens before release as well. I’d welcome any conversation with members of your group as I host frequent clinics in MI and other states around Ohio. Science is helping and the more we can lean on what we know as opposed to what we think or were taught, the better off we all are!

    • overheadathletics 01/18/2018 at 10:16 pm Reply

      Okay, thanks for the comment. We will be releasing our medically managed return to Throwing Program and positional acquisition corrective exercise program very soon!


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