Originally posted by bottle
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Bendables can straighten wrist and still deliver an upward blow through great internal rotation of the arm.
Because they have more racket range in which to work.
The rotorded server on the other hand sends racket up and then down when he would prefer it kept going up.
The adjustment possibility should not be underestimated-- one inch of wrist and fingers throw instead of three, say, or two inches, who knows.
One intrinsic difficulty of mental formulation is that one tends too much toward a round number when maybe some fraction would do better.
Try: A single inch of fingers squeeze to start the racket up before internal rotation takes over.
Now try wrist instead while keeping fingers open.
Fool around with any serve, looking for a break in the serve rather than of the serve.
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