sábado, 10 de febrero de 2007

Badminton


Badminton

Badminton is a racket sport played by either two opposing players (singles) or two opposing pairs (doubles), who take positions on opposite halves of a rectangular court that is divided by a net. Players score points by striking a shuttlecock with their rackets so that it passes over the net and lands in their opponents' half of the court. A rally ends once the shuttlecock has struck the ground, and the shuttlecock may only be struck once by each side before it passes over the net.
The shuttlecock is a feathered projectile whose unique aerodynamic properties cause it to fly differently from the balls used in most racket sports; in particular, the feathers create much higher
drag, causing the shuttlecock to decelerate more rapidly than a ball. Shuttlecock flight is strongly affected by wind, and so competitive badminton is always played indoors. Badminton is also played outdoors as a casual recreational activity, often as a garden or beach game.
Badminton is an
Olympic sport with five competitive disciplines: men's and women's singles, men's and women's doubles, and mixed doubles, in which each pair is a man and a woman. At high levels of play, the sport demands excellent fitness: players require aerobic stamina, strength, and speed. It is also a technical sport, requiring good hand-eye coordination and the development of sophisticated racket skills.

History and development

Battledore and Shuttlecock, an antecedent to the modern game of Badminton. 1854, from the John Leech Archive
Games with a shuttlecock are widely believed to have originated in ancient
Greece about 2000 years ago. From there they spread via the Indo-Greek kingdoms to India and then further east to China and Siam (now Thailand).
In
England since medieval times a children's game called Battledore and Shuttlecock was popular. Children would use paddles (Battledores) and work together to keep the Shuttlecock up in the air and prevent it from reaching the ground. It was popular enough to be a nuisance on the street of London in 1854 when the magazine Punch published a cartoon depicting it.
In the
1860s, British Army officers in Pune, India, began playing the game of Battledore and Shuttlecock, but they added a competitive element by including a net. As the city of Pune was formerly known as Poona, the game was known as Poona at that time.
About this same time, the
Duke of Beaufort was entertaining soldiers at his estate called "Badminton House", where the soldiers played Poona. The Duke of Beaufort’s non-military guests began referring to the game as "the badminton game", and thus the game became known as "Badminton".
In 1877, the first badminton club in the world, Bath Badminton Club,transcribed the rules of badminton for the first time. However, in 1893, the Badminton Association of England published the first proper set of rules, similar to that of today, and officially launched badminton in a house called "Dunbar" at 6 Waverley Grove,
Portsmouth, England on September 13 of that year. They also started the All England Open Badminton Championships, the first badminton competition in the world, in 1899.
The
Badminton World Federation (BWF) was established in 1934 with Canada, Denmark, England, France, the Netherlands, Ireland, New Zealand, Scotland, and Wales as its founding members. India joined as an affiliate in 1936. The BWF now governs international badminton and develops the sport globally.

Laws of the game

The following information is a simplified summary of the Laws, not a complete reproduction. The definitive source of the Laws is the IBF Laws publication, although the digital distribution of the Laws contains poor reproductions of the diagrams.
Playing court dimensions
The court is rectangular and divided into halves by a net. Courts are almost always marked for both singles and doubles play, although the laws permit a court to be marked for singles only. The doubles court is wider than the singles court, but the doubles service court is shorter than the singles service court.
The full width of the court is 6.1 metres, and in singles this width is reduced to 5.18 metres. The full length of the court is 13.4 metres. The service courts are marked by a centre line dividing the width of the court, by a short service line at a distance of 1.98 metres from the net, and by the outer side and back boundaries. In doubles, the service court is also marked by a long service line, which is 0.78 metres from the back boundary.
The net is 1.55 metres (5 ft 1 inch) high at the edges and 1.524 metres (5 ft) high in the centre. The net posts are placed over the doubles side lines, even when singles is played.
Surprisingly, there is no mention in the Laws of a minimum height for the ceiling above the court. Nonetheless, a badminton court will not be suitable if the ceiling is likely to be hit on a high serve.

Equipment laws

The Laws specify which equipment may be used. In particular, the Laws restrict the design and size of rackets and shuttlecocks. The Laws also provide for testing a shuttlecock for the correct speed:
3.1 To test a shuttle, use a full underhand stroke which makes contact with the shuttle over the back boundary line. The shuttle shall be hit at an upward angle and in a direction parallel to the side lines.
3.2 A shuttle of the correct speed will land not less than 530 mm and not more than 990 mm short of the other back boundary line....

Equipment

Rackets

Badminton rackets are light, with top quality rackets weighing between about 70 and 100 grams (without strings).They are composed of carbon fibre composite (graphite reinforced plastic), which may be augmented by a variety of materials. Carbon fibre has an excellent strength to weight ratio, is stiff, and gives excellent kinetic energy transfer. Before the adoption of carbon fibre composite, rackets were made of light metals such as aluminium. Earlier still, rackets were made of wood. Cheap rackets are still often made of metal, but wooden rackets are no longer manufactured for the ordinary market, due to their excessive weight and cost.
There is a wide variety of racket designs, although the racket size and shape are limited by the Laws. Different rackets have playing characteristics that appeal to different players. The traditional oval head shape is still available, but an isometric head shape is increasingly common in new rackets.

Shuttlecock

A shuttlecock (often abbreviated to shuttle) is a high-drag projectile, with an open conical shape: the cone is formed from sixteen overlapping goose feather embedded into a rounded cork base. The cork is covered with thin leather.
Shuttles with a
plastic skirt are often used by recreational players to reduce their costs: feathered shuttles break easily.

Shoes

Badminton shoes are lightweight with soles of rubber or similar high-grip, non-marking materials.

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