“Thanks to impressive athleticism, high-speed video and clever computer modeling, two researchers have unraveled the hidden aerodynamics behind the playful task of skipping over a speeding rope,” writes Wired‘s Dave Mosher.

Those two researchers are former Princeton postdoc Jeffrey Aristoff and Princeton Professor Howard Stone. They published their findings Nov. 1 in Proceedings of the Royal Society A. The full Wired article is here or read more in Science. Below see a video featuring the jump-roping Jiang Li, a professor visiting from China, and a mesmerizing explanation of fluid mechanics.