This Nintendo player turned 'Mario Kart 8 Deluxe' into a fitness game. Here's how he did it.

Washington Post - Technology News 

The lengthy video breaks down how Choi built his "Labo Fit Adventure Kart Kit." The heart of his creation is TAPBO, a small robotic device he engineered that holds the Joy-Con in place and has motorized arms that press down on two of the controller's buttons for accelerating and slowing down in "Mario Kart 8 Deluxe." To play, you sit on the bike (which he comically calls the Bike-Con and covered in cardboard to resemble Nintendo Labo's line of products), hold the Ring-Con in both hands like a steering wheel, and peddle to move forward.