Michael Fred Phelps II (born June 30, 1985) is an American competitive swimmer widely regarded as one of the greatest athletes in Olympic history. Specializing in butterfly and individual medley events, he has held multiple world records and amassed the largest Olympic medal total of any athlete. Phelps combined exceptional physiological traits, a distinctive stroke, and long-term coaching to dominate pool competition across four Olympic Games.

Major achievements

Phelps is best known for his Olympic accomplishments. At the 2004 Athens Games he won eight medals, six of them gold, tying the single-Games medal record held by Alexander Dityatin. In 2008 at Beijing he won eight gold medals, surpassing Mark Spitz's 1972 mark for most golds at a single Olympics. He added four golds and two silvers at London 2012, and five golds and one silver at Rio 2016. His career Olympic total is 28 medals, including 23 golds, making him the most decorated Olympian across all sports.

Events, style, and training

Phelps excelled primarily in the 100 m and 200 m butterfly, the 200 m and 400 m individual medley, and several freestyle relays and medley relays. His technique combined high stroke rate, long reach, and efficient turns and underwater dolphin kick. He trained under coach Bob Bowman from his youth at the North Baltimore Aquatic Club and later continued periods of training associated with university and national programs. His regimen and attention to details like starts, turns, and underwater phases were widely credited for his consistency at top levels.

History and career arc

Born and raised in Baltimore, Maryland, Phelps emerged as a prodigy in his teens and first competed in the Olympics as a teenager. His career included periods of retirement and comebacks: he stepped away after some Games and then returned to compete successfully in later editions. After the 2016 Rio Olympics he announced his retirement from competitive swimming and did not return for the Tokyo 2020 Games.

Impact, foundations, and public life

Beyond medals, Phelps influenced competitive swimming's popularity and techniques used in sprint and medley races. He established the Michael Phelps Foundation, which promotes water safety, youth development and healthy living. His prominence also made him a prominent figure in sports marketing and a subject of public interest for both his athletic achievements and personal challenges.

Phelps has been open about aspects of his personal life that affected his career. He was diagnosed with attention-deficit hyperactivity disorder (ADHD) when he was nine years old. Throughout his career he spoke about the role of focused coaching and routine in harnessing his abilities and addressing challenges. His long-term legacy is often discussed in relation to sports science, coaching methods, and the Olympic movement.

Further reading and resources