Arm & shoulder muscles for writing

I wrote in relation to the video on Shaeffer pens & history of writing:
One thing I noticed in the film is that while it's very clear all the ortho-alphabet writers were using finger writing, it appeared that the shorthand writer was not using her fingers at all -- definitely using her shoulder muscles.

Does anybody use their shoulder muscles to write? I can't remember whether the author of the "Penmanship" exercises article wrote specifically about finger drawing or using the whole arm, but I believe that is what Dr Gregg was talking about when he said one had to *write* Gregg rather than *draw* it.

Who uses just fingers to write (either long or shorthand)? Who uses whole arm?
Thoughts? Opinions? Experiences?

(by sidhetaba for everyone)

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