Tell HN: Use hand grippers to alleviate hand pain when using your keyboard
http://www.amazon.com/dp/B005Y83SJI
http://www.amazon.com/dp/B005Y83SJI
Leading joint mobility experts include Scott Sonnon, Steve Maxwell, and Eric Cobb. Maxwell and Cobb studied under Sonnon.
Last time I checked, Sonnon's most popular joint mobility resource was Intu-Flow. In this DVD, Sonnon comes across as a bit of a New Agey weirdo, but he really knows his stuff.
Maxwell produced the Encyclopedia of Joint Mobility DVD and he has downloadable follow-along joint mobility videos at his site. His instruction isn't as deep as Sonnon's, but some people find Maxwell more likeable.
Cobb's company is named Z-Health, and his resources are overpriced.
Unrelated to joint mobility, Kinesis has announced plans to release a new version of their Contoured ergonomic keyboard. I can't wait.
http://www.amazon.com/Grip-Pro-Trainer-Forearm-Strength/dp/B...
Those powerball/gyroscopic spinners are also interesting for RSI:
http://www.amazon.com/NSD-Power-Essential-Gyroscopic-Exercis...
FYI (alternatives):
My (career military) ex husband only had pain at the keyboard when his weightlifting regimen was interrupted.
I have an old tennis injury that can be troublesome. When it was at its worst, I took gelatin as a supplement daily for two years to feed the tendons (so they could self repair) and generally have fewer problems since then.
Since I'm using a mechanical Keyboard my pain went off and I don't feel any stress.