Sure enough. I get the reference, but that isn't necessarily what 91 looks like. My father was a month short of 94 when he died, and he had "a lot more meat on his bones" than she does. You frequently see film on news reports of birthday celebrations for people who have reached or even passed 100, and they look healthier than she does. She looks like a stick figure.
I guess. Years ago, I did a package of profiles of centenarians. They ranged from a woman who sat silently at the table while I talked to her family members but could not hear, see, or get around on her own ... to a man who walked to the senior center and back every day and trimmed the trees in his yard with a long pole tree trimmer. Another woman told me about her experiences in the 1918 flu that killed her boss and a lot of other people she knew.