human
Is it true that if you live in a house with a lot of stairs, you'll die younger than people who don't?
assistant
I’m not sure about the exact cause-effect relationship between living on stairs and dying earlier, but there are some interesting theories. One is that stair climbing is an indicator of physical fitness, so people who climb more stairs tend to be healthier and live longer. Another theory is that stairs may be associated with higher levels of stress, which could also contribute to shorter life expectancy.