well, they're mostly circus acrobats and gymnast and to perform the flips they need to jump really high, and to jump high you need to produce alot of power from your legs and to do that you need strong muscles in your legs. Im a gymnast myself and i can perform human flags and planches like in the video. But at the same time i have pretty good streangth in my legs. I know this because i do flips too.
IceBlood888(Friday 7th of November 2008 06:57:25 PM)
lol the first one is hard for me becuase one I suck at balance and secound my ass can't bend like that xD (hint im not a dancer >_> Disco woot xD!) but yeah it takes more then just upper body strength...and the others I usually I end up falling on my face(unless someone is holding me x-x) xD ah well im just gonna keep working out I don't like doing fancy stuff I just work out becuase its fun :)