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I hadn't read that. Is that the general consensus now? That a high upper arm is okay if you don't keep it there very long?
As y'know I am open to all interpretations, but it's just a personal belief with me that the lower the upper-arm angle, the better. Sidearmers (like Randy Johnson) don't have many shoulder problems.
am not an "inverted W" scourge, but personally believe that sidearm and underhand are the natural human motions, and the farther you get away from that, the worse off you are. Could be wrong.