Originally posted by Fortitude
Rotj Sidious might not even have a lightsaber, and of he does, his skills with it will have degraded. Mace Windu probably takes this.
'Will have'? Unlike during the PT he can spar with dark acolytes and Vader openly, doesn't have to disguise his activities, etc. etc..
I could see his physical ability declining some, but I'd think he would stay in practice.