A contortionist from South Africa bends her body in an unusual position as she performs at the Ninth China Wuhan International Acrobatics Art Festival in the Wuhan of Hubie Province, China, in 2010. Performers from all over the world take part in the festival, which is now one of four acrobatic events in the world.
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Tihany Spectacular Circus
Four contortionists perform together and create dramatic bending poses at the Tihany Spectacular Circus in Mexico City in 2007. Contortionists are naturally more flexible than most people but must also stretch throughout the day in order to stay limber.
Marco Ugarte/AP
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Mongolian National Circus
A young contortionist practices by bending her body backward and grabbing her feet at the Mongolian National Circus in Ulan Bator. Many girls in Mongolia reportedly train for contortion as a career because it is considered a nationally respected art form.
Claro Cortes IV/Newscom/Reuters
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Shanghai Circus
A contortionist bends her body while being held by another in rehearsal for the Shanghai Circus in Sydney in 2004. A common myth about contortionists is that they are double-jointed or have more joints than most people do. They actually have the same number of joints as anyone else but can naturally bend much farther than the average person.
Rob Griffith/AP
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Acrobatics Art Festival
Well-known male contortionist Alexey Goloborodko, who is now 17, performs what is known as an oversplit at the Eighth International Acrobatics Art Festival in China in 2008. Many refer to Goloborodko as the most flexible human on the planet.
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Spaghetti Circus contortionists
Two contortionists from Spaghetti Circus in Sydney bend over backward for some cotton candy as they take a break from performing. Spaghetti Circus, one of the country's leading youth circuses, is well known for its original performances.
Troy Bendeich/Newspix/Rex Features
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Walking on stairs
A male contortionist bends his body to walk on stairs. Another myth about contortion is that women are better suited for it than men. The numbers of male and female contortionists are nearly equal around the world, and in the late 19th century contortionists were reportedly mostly men.
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A gymnastics class
A student bends backward during gymnastics class at a youth recreation center in Shenyang, China. Most contortionists start practicing at a very early age — some as young as 5. In some countries, people believe starting younger than 5 could cause bone deformities.
Sheng Li/Reuters
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Cirque du Soleil
Two contortionists perform connecting backbends during Cirque du Soleil's "Alegria" show in Sao Paulo, Brazil. The show premiered in 1994 and has been one of Cirque du Soleil's biggest hits — touring to more than 65 cities around the world.
Paulo Whitaker/Newscom/Reuters
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Acrobatics Art Festival
Contortionist Alexey Goloborodko performs a dramatic bending pose at the Eighth Wuhan International Acrobatics Art Festival in Wuhan of Hubei Province, China, in 2008. Goloborodko also has trained in classical and modern dance and Chinese martial arts.
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Tihany Spectacular Circus
Contortionists stack on top of one another at the Tihany Spectacular Circus in Mexico City in 2007. It may look odd and painful to others, but being a contortionist is said to be a fun way to relieve stress and keep the body in shape.
Marco Ugarte/AP
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Blue Sky Girls
Mongolian contortionists Blue Sky Girls perform during the awards ceremony of the 34th Monte-Carlo International Circus Festival in Monaco in 2010.
Eric Gaillard/AP
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Contortionist photo
A contortionist poses for a photograph in front of the Houses of Parliament in London in 2011. To stay limber, some contortionists avoid red meats and eat mostly chicken and fish, as well as plenty of fruit and vegetables.
Oli Scarff/Getty Images
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Mongolian National Circus
Young contortionists practice at the Mongolian National Circus in Ulan Bator. Contortionists are known as either frontbenders or backbenders, depending on the direction in which the spine is more flexible. Very few can bend both ways.
Claro Cortes IV/Newscom/Reuters
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Zunyi Acrobatic Troupe
Contortionists of the Zunyi Acrobatic Troupe from the People's Republic of China perform during a press preview in Madrid, Spain, in 2007. Most contortion performances aim to convey different emotions by including costumes, choreography and light acting in their shows.
Daniel Ochoa deOlza/AP
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Contortionist brothers
Contortionist brothers perform at a shopping mall in Hong Kong. Contrary to some beliefs, people are not born contortionists. With proper and diligent training, anyone can make their muscles more flexible and create these unusual twists and bends.
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Shanghai Circus School
Members of the Shanghai Circus School contort into a human stack during a rehearsal of the Flying Fruit Fly Circus in Sydney in 2000. In order to maintain flexibility, most contortionists have to go through intense, forceful and sometimes painful training for several hours throughout the day.
Rick Rycroft/AP
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A contortionist on 'Ellen'
A contortionist holds her body up during a performance at "Ellen's Bigger Longer & Wider Show" in Chicago in 2009. The variety show, which aired on TBS and was hosted by comedian Ellen DeGeneres, also featured magician David Blaine and rapper Kanye West.
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A box squeeze
Three contortionists squeeze into a small Perspex (acrylic glass) box to protest overcrowded housing conditions for children in England.
Stephen Hird/Newscom/Reuters
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Kathmandu performance
A Chinese contortionist performs in Kathmandu, Nepal. In 2010, a Chinese acrobatic troupe performed in the Nepali capital to mark the 55th anniversary of diplomatic relations between Nepal and China.
Prakash Mathema/AFP/Getty Images
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Gymnastics training
Students stretch their backs during a training session at a gymnastic course at Shenyang Sports School in Shenyang, Liaoning Province, China. About 60 students, ages 6-15, go through the nine-year gymnastic program for a chance to join the national team.
Sheng Li/Reuters
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The Golden Domes
A contortionist group called the Golden Domes of Russia performs at the 21st World Circus Festival in Paris in 1998. Contortionists were once associated with only circuses and fairs, but today they can be found performing in nightclubs, at trade shows, at concerts or in music videos.