Yes, I am that old. But my wrists are older. And that's because regular typing on a normal sort of keyboard makes you twist your wrists to get them in position to hit the keys. Because you bend and flex and whatnot to type, one's wrists can, at least internally, become truly FUBAR. Some people I know have had to have surgery for carpal tunnel syndrome...and I was afraid for a while there that I would need a bit of that myself. Here's how I've gotten my wrists to quit being so damn angry all the time.
First thing I did is changed my gear. I had a really sweet gaming keyboard--so I could make use of all the macros and extra programmable keys--and I hated to give it up, but my wrists demanded it. (And it was hell to get me to give up my Trackpoint keyboard in order to get the macros.) So, anyway, I started looking at alternatives.