I know a 78 year old lady who has had a Taurus 92 9mm for 20 years. It was her husbands gun, and she keeps it in her bedroom dresser drawer. She can no longer load rounds into the magazines by hand, so we bought her a mag loader. She has trouble racking the slide, but she has found that if she uses a rubber coated pot holder to grip the slide serations, she can do it. With her, it is not a question of arm/shoulder strength, her left hand grip is not strong enough by itself.
After she racks the slide, She uses both thumbs to push down on the hammer drop safety (!)