I was experiencing the same – narrow hand position causing lots of back pain. Keeping my arms/shoulders in a natural position seems to have fixed it.
There's also tons of split keyboards available now.
There's also tons of split keyboards available now.
The UHK can be mapped to a proper layout easily (it has proper widths for modifier keys on the right, so you just need to move the Fn somewhere else and you can get a standard set), but it's not cheap.