I’ll get symptoms of RSI from time to time but it’s due to work not cycling. I find wearing a brace while I ride helpful as well as Aero Bars as they allow my wrists to completely relax. I’ll also note that the standard drug store brace is sometimes not stout enough for use on a bike so I found rollerblading wrist guards also worked well. For me generally a month in a brace helps every thing clear up.