Olympic injuries: Which are most common?

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Olympic champions go over their routines

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Brazil celebrates Olympic gold in men's football

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Olympic twins rebuked for finishing race holding hands

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U.S. gymnast Simone Biles won a record-tying four gold medals and one bronze as she dazzled the crowd with a mix of elegance and athleticism rarely seen in the sport.

Simone Biles wins fourth gold in Rio Olympics

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Tommie Smith reflects on the 1968 Olympics

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Jamaica's Usain Bolt (C) jokes with Canada's Andre De Grasse (L) after they crossed the finish line in the Men's 200m Semifinal during the athletics event at the Rio 2016 Olympic Games at the Olympic Stadium in Rio de Janeiro on August 17, 2016. / AFP / OLIVIER MORIN (Photo credit should read OLIVIER MORIN/AFP/Getty Images)

Usain Bolt cracks joke crossing finish line

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European Olympic Committee (EOC) President Patrick Hickey gives a press conference after the EOC's 37th general assembly in Istanbul on November 22, 2008. AFP

European Olympic head arrested in alleged ticket scam

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See Simone Biles get a kiss from celebrity crush

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RIO DE JANEIRO, BRAZIL - AUGUST 08: Kerri Walsh Jennings of United States celebrates during the Women's Beach Volleyball preliminary round Pool C match against Fan Wang and Yuan Yue of China on Day 3 of the Rio 2016 Olympic Games at the Beach Volleyball Arena on August 8, 2016 in Rio de Janeiro, Brazil. (Photo by Ezra Shaw/Getty Images)

Kerri Wash Jennings dominates olympic beach volleyball

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RIO DE JANEIRO, BRAZIL - AUGUST 16: Giles Scott of Great Britain celebrates winning the gold medal in the Finn class on Day 11 of the Rio 2016 Olympic Games at the Marina da Gloria on August 16, 2016 in Rio de Janeiro, Brazil. (Photo by Clive Mason/Getty Images)

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South African stuns the world at Rio Olympics

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RIO DE JANEIRO, BRAZIL - AUGUST 08: Ibtihaj Muhammad of the United States looks on during the Women's Individual Sabre on Day 3 of the Rio 2016 Olympic Games at Carioca Arena 3 on August 8, 2016 in Rio de Janeiro, Brazil. (Photo by Patrick Smith/Getty Images)

Muslim-American athelete makes history at the Olympics

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China's Fu Yuanhui poses with her bronze medal on the podium of the Women's 100m Backstroke during the swimming event at the Rio 2016 Olympic Games at the Olympic Aquatics Stadium in Rio de Janeiro on August 8, 2016. / AFP / GABRIEL BOUYS (Photo credit should read GABRIEL BOUYS/AFP/Getty Images)

Chinese swimmer praised for challenging taboo

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Michael Phelps cements Olympic legacy in Rio

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Usain Bolt's smile cracks up the Internet

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RIO DE JANEIRO, BRAZIL - AUGUST 09: (R to L) Gold Medalists Simone Biles, Gabrielle Douglas, Lauren Hernandez, Madison Kocian and Alexandra Raisman of the United States stand on the podium for the national anthem at the medal ceremony for the Artistic Gymnastics Women's Team Final on Day 4 of the Rio 2016 Olympic Games at the Rio Olympic Arena on August 9, 2016 in Rio de Janeiro, Brazil. (Photo by Alex Livesey/Getty Images)

Heated debate over Olympic podium moment

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Podium proposal at Rio Olympics

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BEIJING, CHINA - AUGUST 27: Usain Bolt of Jamaica celebrates after crossing the finish line to win gold in the Men's 200 metres final during day six of the 15th IAAF World Athletics Championships Beijing 2015 at Beijing National Stadium on August 27, 2015 in Beijing, China. (Photo by Cameron Spencer/Getty Images)

Usain Bolt is...

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Douglas produced an astonishing showing at the London 2012 Games with a performance which belied her years.

Mom: Online criticism devastated Gabby Douglas

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15-year-old Michael Phelps: I don't have a normal life

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TOPSHOT - USA's Michael Phelps kisses his gold medal on the podium of the Men's 4x100m Freestyle Relay Final during the swimming event at the Rio 2016 Olympic Games at the Olympic Aquatics Stadium in Rio de Janeiro on August 7, 2016. / AFP / GABRIEL BOUYS (Photo credit should read GABRIEL BOUYS/AFP/Getty Images)

Michael Phelps is ...

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Lone Russian long jumper suspended from Rio games

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2012 Heptathlon champion hopes for a repeat in Rio

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RIO DE JANEIRO, BRAZIL - AUGUST 12: Katie Ledecky of the United States leads the field in the Women's 800m Freestyle Final on Day 7 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 12, 2016 in Rio de Janeiro, Brazil. (Photo by Adam Pretty/Getty Images)

Ledecky crushes rivals, wins gold medal

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RIO DE JANEIRO, BRAZIL - AUGUST 06: Xinyi Chen of China competes in heat four of the Women's 100m Butterfly on Day 1 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on on August 6, 2016 in Rio de Janeiro, Brazil. (Photo by Lars Baron/Getty Images)

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Rio athletes deal with water full of sewage and trash

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Which nation sent only 2 athletes to Rio?

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RIO DE JANEIRO, BRAZIL - AUGUST 11: Michael Phelps of the United States celebrates winning the Men's 200m Individual Medley Final on Day 6 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 11, 2016 in Rio de Janeiro, Brazil. (Photo by Al Bello/Getty Images)

How do elite athletes conquer their nerves?

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Who holds the most incredible Olympic record?

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Simone Biles amazes teammates

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The water of the diving pool at right appears a murky green as the water polo pool at left appears a greener colour than the previous day during a preliminary round match between United States and France in the Maria Lenk Aquatic Center at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Wednesday, Aug. 10, 2016. (AP Photo/Matt Dunham)

A 2nd Olympic pool in Rio turns green

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The most common injury at the Olympics