I absolutely can not stand the potential for knee stress and injuries to the knees I see in this action in the pitching motion. It is the reason I never complain about leapers when I see them in my DD's games ...
IF it is done correctly the pitching motion in the womens game is far less stressful than the leaping seen in the mens game. Before mucking around with the rules I would suggest people carefully consider the ramifications. Watch some top level mens pitchers and then ask yourself if this is the motion you want to teach in 8U-12U. The primary reason I see for leaping is a forced early opening of the hips. This is a mechanical defect and needs to be corrected. IME most everyone who says the leaping rule is wrong, silly, nonsense, etc. has a pitcher with a mechanics/leaping issue. Fix the mechanics and most medical issues will go away.
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