Michael Phelps in the context of "Dolphin kick"

Abilities are powers an agent has to perform various actions. They include common abilities, like walking, and rare abilities, like performing a double backflip. Abilities are intelligent powers: they are guided by the person's intention and executing them successfully results in an action, which is not true for all types of powers. They are closely related to but not identical with various other concepts, such as disposition, know-how, aptitude, talent, potential, and skill.

Theories of ability aim to articulate the nature of abilities. Traditionally, the conditional analysis has been the most popular approach. According to it, having an ability means one would perform the action in question if one tried to do so. On this view, Michael Phelps has the ability to swim 200 meters in under 2 minutes because he would do so if he tried to. This approach has been criticized in various ways. Some counterexamples involve cases in which the agent is physically able to do something but unable to try, due to a strong aversion. In order to avoid these and other counterexamples, various alternative approaches have been suggested. Modal theories of ability, for example, focus on what is possible for the agent to do. Other suggestions include defining abilities in terms of dispositions and potentials.

Breaststroke is a swimming style in which the swimmer is on their chest and the torso does not rotate. It is the most popular recreational style due to the swimmer's head being out of the water a large portion of the time, and that it can be swum comfortably at slow speeds. In most swimming classes, beginners learn either the breaststroke or the freestyle (front crawl) first. However, at the competitive level, swimming breaststroke at speed requires endurance and strength comparable to other strokes. Some people refer to breaststroke as the "frog" stroke because the arms and legs move somewhat like a frog swimming in the water. The stroke itself is the slowest of any competitive strokes and is thought to be the oldest of all swimming strokes.

This article lists the individuals who have won at least four gold medals at the Olympic Games or at least three gold medals in individual events.

Alexander Nikolaevich Dityatin (Russian: Александр Николаевич Дитятин; 7 August 1957 – 14 October 2025) was a Russian gymnast, three-time Olympic champion and Honoured Master of Sports of the USSR. Winning eight medals at the 1980 Summer Olympics, he set the record for achieving the most medals of any type at a single Olympic Games. The American swimmer Michael Phelps has now twice equalled this record, at Athens 2004 and Beijing 2008. Dityatin competed for the Leningrad Dinamo sports society.

Mark Andrew Spitz (born February 10, 1950) is an American former competitive swimmer and nine-time Olympic champion. He was the most successful athlete at the 1972 Summer Olympics in Munich, winning seven gold medals, each in world-record time. This achievement set a record that lasted for 36 years, until it was surpassed by fellow American Michael Phelps, who won eight golds at the 2008 Summer Olympics in Beijing. Phelps, like Spitz, set seven world records.

Between 1968 and 1972, Spitz won nine Olympic golds, a silver, and a bronze, in addition to five Pan American golds, 31 Amateur Athletic Union (AAU) titles, and eight National Collegiate Athletic Association (NCAA) titles. During those years he set 35 world records, two of which were in trials and unofficial. Swimming World Magazine named him World Swimmer of the Year in 1969, 1971, and 1972. He was the third athlete to win nine Olympic gold medals.

This is a list of athletes who have won multiple gold medals at a single Olympic Games.

Milorad "Milo" Čavić (Serbian Cyrillic: Милорад "Мило" Чавић, Serbian pronunciation: [mîloraːd tʃǎːʋitɕ]; born May 31, 1984) is a Serbian former professional swimmer. He won a silver medal in the 100-meter butterfly at the 2008 Summer Olympics in a historic race with American swimmer Michael Phelps. Čavić also was World and European champion, as well as world record holder. He is one of five swimmers to break 50 seconds in the 100m butterfly.