JJsqueeze
Dad, Husband....legend
Palm to the sky at 9:00 is an ideal to generate the greatest amount of rotation if the arm and hand. Of course you can pitch without getting fully palm to the sky but one should strive to open the hand as possible as the elbow drops into the slot at this stage of the circle. Do BMs demonstration where you hold the arm straight out and palm open. Now rotate the hand all the way to right and then back all te way to the left. Now do it as fast as you can, back and forth several times. Do you see your hand blur? He argues this is the fastest part of the body and during the pitch continues to much speed.
I agree it will rotate the arm the most and the fastest, the sticking point is "so what?" a figure skater rotates pretty fast, but stick a ball on her head and it ain't moving forward.
to be more specific, I see the speed being generated by the elbow bend that I/R allows and the fact that the natural motion of the arm is I/R, it is just this palm up leading to faster rotation and therefore faster speed that is confounding me. I do see one way where it would add speed and that is if the arm is still bent at release then there will be a moment arm created that the rotation can act upon to increase speed but it would be a really small moment arm in a windmill motion.
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