This is certainly interesting. Harvard medical, at that. There's an entire industry that's developed on the concept of ergonomic keyboards, wrist supports, & the like. Could be that all those innovations are a bunch of hooey...

"Carpal tunnel is caused when nerves in the wrist are pinched, however it's not caused by frequent use of a keyboard, claims the report. Instead, it is caused by heredity, body weight, fracture, or even pregnancy."