CONSIDER the human machine in middle age: atrociously maintained, rusty from disuse. None of its parts—the bellows, the tubes, the pump—function as efficiently as they once did.

Navigating the world right now can feel like running into that aunt who comments on your weight at Thanksgiving every single day: When you open up Instagram, take public transit, watch TV, or scroll ...

Who doesn’t like to burn off a little steam after a long week at the office or in the classroom, or just have a little fun ...