Every man I know that lived well into their 80's touching or breaking 90 were all active in some way. Once they stopped, they died shortly after. Though to be honest, they didn't stop by choice, usually from an injury or medical condition.
I’m going to say there’s some mixup of causation and correlation here
Very common story for a relatively minor injury or disease in an old person to snowball to their death when they lose mobility and independence. You gotta stay active if you want to keep living.