First I recommend you keep a round in the chamber.
Second as others have suggested get some exercise.
Third the cocking the hammer, and push pull method makes working the slide a lot easier.

Still if/when I get to the point that I cannot handle a semiauto properly I will replace them all with S&W Revolvers in 45 ACP.

Even with shakey hands I still think I could reload pretty quickly with ball ammo and full moon clips.

Might have to pull the trigger DA with fingers from both hands, or just cock and shoot all single action, but I am going to remain ably armed as long as I can....