He broke the swimming record.
In the Beijing Olympics, French swimmer Alain Bernard broke the world record of the 100m freestyle in the men's division with a time of 46.9seconds
Michael phelps- he broke the record of 8 medals
There were no Olympics held in 2009, however Rebecca Adlington won 2 medals at the 2008 Olympics the freestyle 400 m and freestyle 800 m, becoming the first British Olympic swimming champion since 1988 and the first British swimmer to win two Olympics golds since 1908. When she competed in the heats of the 400 m, she broke the Commonwealth record with a time of 4:02.24 and when she competed in the preliminary heats of the 800 m, she broke the British, Commonwealth, European and Olympic records with a time of 8:18.06 and broke the world record in the final with a time of 8:14.10.
Kathleen (Katie) Ledecky of the United States won the gold medal in the women's 400 m freestyle at the Rio 2016 Olympics.Her result was 3:56:46. She broke a world record and an Olympic record.
The winner of the gold medal in the women's 400 m freestyle at the Rio 2016 Olympics was the United States.Their athlete was Kathleen Ledecky, who also broke a world record and an Olympic record in the event.
Barry Bonds broke the record in the 20 century.
Katie Ledecky (United States) won gold in Women's 800m Freestyle at the Rio 2016 Olympics. She broke the world record for the fifth time in this race with a time of 8:04.79. Ledecky smashed the Olympic record by 8.07 seconds and beat the silver medallist Jazz Carlin (Great Britain) by 11.38 seconds.
19-year-old Rebecca Adlington won 2 gold medals, one in the 800m freestyle (in which she also broke a 19-year old world record by 2 seconds), and the other in the 400m freestyle. Jo Jackson won bronze in the latter race as well.
He broke his own 100m record, the 200m record of Michael Johnson and the 4x100mR record of the USA.
UT's Ricky Williams broke the record (although he does not hold the current record).