swimming, self-propulsion through water, often as a form of recreation or exercise or as a competitive sport. It is mentioned in many of the classics in connection with heroic acts or religious rites. The first book on methods of swimming was Nicolas Wynman's Dialogue Concerning the Art of Swimming (1538). Swimming calls more muscles into play with exact coordination than most other sports, and its high repetition of movement makes it extremely beneficial to the cardiovascular system.

Swimming Strokes

Swimming strokes should create the least possible water resistance; there should be a minimum of splashing so that forward motion is smooth and not jerky. The stroke most commonly used to attain speed is the crawl, standardized in Australia (hence sometimes called the Australian crawl) and perfected in the United States. In the crawl the body is prone; alternating overarm strokes and the flutter kick are used, and the head remains in the water, the face alternating from side to side. The trudgen stroke (named for an English swimmer whose speed made it famous), also involves alternate overarm strokes in a prone position, but a scissors kick is used and the head remains on one side. The backstroke is done in a supine position and in racing requires alternate over-the-head arm strokes and a flutter kick. The elementary backstroke involves alternation of the frog kick with simultaneous strokes of the arms, which are extended at shoulder level and moved in an arc toward the hips. The sidestroke, a relaxed movement, entails a forward underwater stroke with the body on one side and a scissors kick. The breaststroke can also be a restful stroke and is accomplished in a prone position; frog kicking alternates with a simultaneous movement of the arms from a point in front of the head to shoulder level. The most difficult and exhausting stroke is the butterfly; second only to the crawl in speed, it is done in a prone position and employs the dolphin kick with a windmill-like movement of both arms in unison. It is mastered by only the best swimmers. The dog paddle, a very simple stroke that takes its name from the way a dog swims, is done by reaching forward with the arms underwater and using a modified flutter kick.

In freestyle swimming any stroke may be used, but the crawl, considered the speediest, is almost always favored. No matter what the stroke, breathing should be easy and natural, since the specific gravity of the human body, although it varies with the individual, is almost always such that the body floats if the lungs are functioning normally. In races, facility in diving from a firm surface is essential, except in the backstroke.

Competitive Swimming

Swimming became organized as an amateur sport in the late 19th cent. in several countries. Its popularity increased with the development and improvement of the swimming pool, and swimming was part of the first modern Olympic Games (1896). Olympic events for women were included in 1912. Today Olympic swimming events comprise the 50-, 100-, 200-, 400-, 800- (women), and 1,500-meter (men) freestyle races; 200- (men), 400-, and 800-meter (women) freestyle relay races; the 400-meter medley (mixed stroke) relay; 100- and 200-meter backstroke, breaststroke, and butterfly races; 200- and 400-meter individual medley races; springboard and high diving events (see diving, springboard and platform diving, springboard and platform, sport of entering the water from a raised position, often while executing tumbles, twists, and other acrobatic maneuvers. In most dives the upper part of the body enters the water first, and the arms are extended straight over the
..... Click the link for more information. ); water polo water polo, swimming game encompassing features of soccer, football, basketball, and hockey. The object of the game is to maneuver, by head, feet, or hand, a leather-covered ball 27 to 28 in.
..... Click the link for more information. ; and women's synchronized swimming. Among the more successful American Olympic swimmers have been John Weissmuller, Buster Crabbe, Esther Williams, Don Schollander, Mark Spitz, Matt Biondi, and Janet Evans. Among non-Olympic distance events, swimming the English Channel has been most publicized. The first confirmed crossing was made (1875) by Matthew Webb of England; Gertrude Ederle of the United States was the first woman to perform (1926) this feat. Swimming has never achieved sustained success as a professional sport.

Bibliography

See F. Oppenheim, The History of Swimming (1970); J. E. Counsilman, The Complete Book of Swimming (1977); D. F. Chambliss, The Making of Olympic Swimmers (1988).

swimming

In recreation and sports, the propulsion of the body through water by combined arm and leg motions. Swimming is popular as an all-around fitness routine and as a competitive sport. It has been included in the modern Olympic Games since their inception in 1896. Events include freestyle (crawl-stroke) races at distances of 50, 100, 200, 400, 800, and 1,500 m; backstroke, breaststroke, and butterfly races at 100 and 200 m; individual medley races at 200 and 400 m; freestyle relays, 4 × 100 m and 4 × 200 m; and the medley relay, 4 × 100 m. Long-distance swimming competitions, usually of 15–37 mi (24–59 km), are generally held on lakes and inland waters.