I have a suspicion. Dancing was actually invented by an international undercover cardiovascular team to coerce throngs of people into an activity that would improve the health of their hearts. If you watched the video, you saw a girl getting a pretty good work out, with no outside motivation, and she looked happy while she was doing it. Ingenious. 

 

Perhaps you know of other subversive heart thumping pursuits, cleverly disguised as sports and recreation, that entice thousands of people who would otherwise be eating chips on the couch. Yeah, yeah, they get fancy letters of recognition, and paper certificates in front of a gymnasium full of weepy parents flashing cameras, or if by chance they go professional they can earn a living at it. But you could also make big bucks at an investment company sitting in a chair that swivels, leaning behind a desk with a latte in one hand and a doughnut in the other. It would still pay the bills, and you would not even sweat.