Jumping rope is one of the better cardiovascular workouts you can do. But imagine doing it like this Japanese girl for 30 seconds straight. Does not seem like a good time.
That is a super impressive skill. At the same time, it definitely also looked like she was going to shit on the floor at any given time. So if you want to do a crazy workout and risk leaving a blasted colon behind you, the Japanese Girl School of Jump Rope is where you need to be.