During decades, people were encouraged, unfortunately to take the elevator instead of the stairs.
But medical studies have shown that people who take the stairs, or who walk even only a mile a day (on a regular basis) are at a far lesser risk of becoming obese. Thus, in architecture, we have now what we call "active design": buildings that are purposefully designed to make people prefer to take the stairs rather than the elevator.
Here is a recent project, the Cooper Union building, in New York (arch: Morphosis), and you can see how the architects have designed their stairs to attract people.
And in urbanism it's the same: to fight obesity pandemics, our master plans now focus on how to make cities "walkable", how to encourage people to walk or take public transports rather their own private car.