Dancers don't just dance. It takes years to master the flavours and ingredients that make a good dancer. There's so much to think about and it takes a lot of effort to practice the different elements.
I love this infographic which shows characteristics that dancers have to think about - in order to achieve greatness. It's tough work to make it look so effortless...
....Oh and don't forget to breathe :D
Infogrpahic courtesy of: http://riotandfrolic.typepad.com/blog/2014/03/a-little-explanation-of-judges-marks-characteristics-of-the-dance.html