Superagers
People in their 80s with much younger brains
Superagers are adults in their 70s and 80s whose memory performance matches that of people decades younger. Brain imaging shows they retain unusually thick cortex in regions linked to attention and motivation, and lose less brain volume per year than typical agers. The pattern isn't explained by sheltered lives or unusual genetics. It seems to depend on what they do, and on how much they're willing to keep doing it.
In real life...
The most consistent findings across 25 years of superager research are that they tolerate mental discomfort better than their peers, and they tend to be unusually social. Build small doses of both into your week. Pick a book one level harder than you'd usually choose. Say yes to the dinner invite when you'd rather stay home. The discomfort and the connection aren't side effects. They're the active ingredients.