J., What about the appearance of bat speed (blur) before the bat get to the above position.
How does the bat move from vertical to that position.
Shoulder tilt and elbow drop. Try it. Get in front of a mirror. Get in a hitting stance with the barrel above your head. Now, try not to supinate whatsoever, and tilt your shoulders and drop your elbow, and stop the instant that the elbow is at your side. Where is the barrel now? It's over your back shoulder, maybe even to the outside of it.
Now, from there; simultaneously ulnar deviate and turn your chest toward the pitcher, with the spine and shoulders tilted. There is some supination of the top hand as you ulnar deviate, to get the top hand facing up, but that happens as the UD is throwing the barrel down in an arc.
Where does the barrel go? Right to the ball, and the path flattens out.
If the bat isn't thrown until that position why don't we see a speed increase at that point?
How does the bat move from vertical to contact with just ulnar deviation (wrist bending pinky to wrist?)?
The speed does increase. It moves from vertical as I stated above. The turn of the shoulders while tilted.
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