Pole dance combines dance and acrobatics centered on a vertical pole. This performance art form takes place not only in gentelman's clubs as erotic dance, but has also recently gained popularity as a mainstream form of fitness, practiced by many enthusiasts in gyms and in dedicated dance studios. Amateur and professional pole dancing competitions are held in countries around the world. Pole dance requires significant muscular endurance and coordination (as well as sensuality, in exotic dancing). Today, pole performances by exotic dancers range from basic spins and striptease in more intimate clubs, to athletic moves such as climbs and body inversions in the "stage heavy" clubs of Las Vegas and Miami. Dancer Remy Redd at the King of Diamonds, for example, is famous for flipping herself upside down into a split and hanging from the ceiling. Pole dance requires significant strength and flexibility. Upper body and core strengh are required to attain proficiency, proper instruction, and rigorous training is necessary. Since the mid 2000s, promoters of pole dance fitness competitions have been trying to change peoples' perception of pole dance to include pole fitness as a non-sexual form of dance and acrobatics, and are trying to move pole into the Olympics as pole sports.