[quote=“Chris O’Leary”]This is likely caused by the Olecranon slamming into its fossa.
If he learns to pronate while his forearm is flying out and his elbow is rapidly extending, then he might reduce some of this force.
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What is the angle of his elbow at the moment his shoulders start to turn? I’d bet its more like 135 degrees rather than the more traditional 90 degrees.
If he can strengthen the muscles of his arms so that they can keep his forearm from flying out so quickly.[/quote]
Chris, exactley when does the slamming of the olecranon into the fossa occur within the throwing motion? I readily admit that pronation is a good thing. You overemphasize its role. There is no evidence that “early Pronation” does anything. There is evidence that excessive pronation/supination can lead to tennis elbow [generic term] as well as medial side pain [ucl]. There is another ligamant within the elbow that you would do well to investigate. Look at the role it plays in keeping the elbow intact. It is the annular ligament it is also responsible for many articulation injuries, excessive uneeded motions are critical to not upsetting the elbows tight structure. no matter how hard you try you will never stop either varus/valgus torque. Simply put if you throw your arm has to endure high degrees of both. There is such a position called the neutral position in regards to the elbow. This would be hand behind ball, fingers on top. No supination or pronation, neutral. This would be the ideal position to acellerate an object from proximal to distal. Pronation should be thought of as a last effort/extension, in fact many believe that this is where that illusive “pop” that some pitchers achieve comes from. There is no scientific data that states “early pronation” will do anything in regards to staving injury or increase performance that I have seen. there is much data that concludes pronatin upon release is a mechanicsim for improved performance and injury protection. If you have some documentation/research that clearly states through research that “early pronation” is a sure fire way to stop injury please post it.