I'd suggest a variety of hooping moves for improving flexibility (and coordination). If you use a weighted hoop they will help build up strength too. For example:
Hoop Tips & Tricks: Backwards Vertical Weave- Hoopnotica Tutorial - YouTube
If you feel strain in your hands and wrists while using a standard PC keyboard and are right-handed, and don't have the option to reduce time at the keyboard, then try a small keyboard without the numpad instead. This angles the forearms inwards for natural ergonomics, regarding strain on the tendons that move the fingers. Our fingers are moved by the muscles in our forearm which attach to the elbow. We have no muscles in our fingers. They are a special case.
The vast majority of natural movements in our arms and hands involve forearms angled inwards towards the body (e.g. feeding, using common tools to manipulate or make objects).
F 5 ft 3. HW: 196 lbs. Primal SW (May 2011): 182 lbs (42% BF)... W June '12: 160 lbs (29% BF) (UK size 12, US size 8). GW: ~24% BF - have ditched the scales til I fit into a pair of UK size 10 bootcut jeans. Currently aligning towards 'The Perfect Health Diet' having swapped some fat for potatoes.