This article challenges the common belief that more shoulder mobility automatically leads to higher pitching velocity. Multiple studies show that rotational force production—especially shoulder internal and external rotation strength, along with force generated through the lower body and core—is a much stronger predictor of velocity than passive range of motion. The takeaway is simple: mobility has value for monitoring injury risk, but pitchers looking to throw harder should focus on building and expressing force throughout the kinetic chain rather than chasing extra degrees of layback.
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