japanese interior design principles

see those three bars sticking up in the middle of the road? so why are they there? what are their affordances? well, maybe they're for stretching and turning. maybe you're supposed to run around them as fast as possible, in loops for five minutes. it's part of an exercise course. or maybe you can lean your bicycles on them. or maybe they they're stands for a net that you stretch between them, and play games. so what do you think?