Shoulder Muscles and Handwriting

"Tips for improving your handwriting," by Dyas A. Lawson sounds worth trying.Click here to read more

Here's it's idea for improving one's handwriting:

I’ve found only one reference to using the right muscle groups to write, and this is critical. I can’t be the only person who knows this; I’m neither that smart nor that good. Calligraphy instruction books address hand position, desk position, lighting, paper, you name it--but for some reason, not using the right muscles.

As you’ve probably surmised, the "right muscles" are not those in the fingers. You must use the shoulder-girdle and forearm muscles. This muscle group is capable of much more intricate action than you think and tires much less easily than fingers, besides giving a smooth, clean, sweeping look to the finished writing. Though it seems paradoxical, since we’re accustomed to thinking of small muscles having better control, the shoulder-girdle group, once trained, does the job better.