Dancing is as physically demanding as some of the most mainstream sports out there. Here is a video that proves that this is so. Professional “Dancing With The Stars” duo, Edyta Sliwinska and Alec Mazo were motion captured to observe the strength, speed and flexibility they exude when dancing. A few key points from the video: A professional dancer doing Jive can reach foot speeds of 15MPH. A professional dancer spins at 180 RPM – Which is 4 times the speed of a record player spinning. I found out that the average tennis serve speed is of 175 RPM. Alright! We got 5 RPM on those tennis players! After watching the video, do you still have any doubts about the athleticism dancing requires?