(HealthDayNews) -- There are two things that go when you get old: The first is your memory, and we forgot the second one.
You'd have to be pretty old to have forgotten that joke, but when you age, even if you're in good health, some abilities do decline.
According to the American Journal of Public Health, they include: the ability to read the small print in a newspaper, the ability to lift a 10-pound weight, the ability to walk one-quarter mile, and the ability to climb a flight of stairs.
They didn't list a fifth item, but the ability to laugh at jokes that begin, "you know you're getting old when . . ." goes pretty quickly, too.
