I work on a computer too as a freelancer. During breaks, I practice kali with 2 lightweight aluminum baseball bats, a Rambo knife and a katana. Works good for those wrist pains, shoulder pains and neck pains.
[youtube]
http://www.youtube.com/watch?v=YvrvoBIq__k[/youtube]
You'll feel an exhilarating sense of peace after practice. Kali is one of the most peaceful martial arts around. It's awesome!

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