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Indoor field hockey, or indoor hockey, is an indoor variant of "traditional" outdoor field hockey. It is not to be confused with other indoor hockey variants such as rink hockey or floorball. ==Outline== It is traditionally and mainly played as a pastime by outdoor field hockey players during the off-season, when the outdoor pitches are frozen, or alternatively conditions are too hot for outdoor play. Indoor field hockey is played in regular national and international championships. The first Indoor Field Hockey World Cup was organized in 2003. It included countries which do not compete at the highest level of the outdoor game. Indoor field hockey differs from its outdoor parent in several ways: * The playing field is smaller than the outdoor pitch. An indoor pitch is 18m to 22m wide by 36m to 44m long, divided by a center line. The shooting circle is a semicircle measured out 9m from each goal post. Side-boards mark the sidelines, helping to keep the ball in the field and allowing players to play against it. Despite who hit it, when the ball goes over the endline the defensive team will receive a hit coming out. The pitch is made of wood or synthetic material. The board surface facing inwards to playing surface is angled slightly to encourage ball to bounce down not up. * The goals are smaller than a field hockey: 2m high by 3m wide and a minimum of 1m deep. (This is the same size as Team Handball goals as early indoor hockey used existing handball courts) * A team consists of 5〔FIH Announces changes to Indoor Hockey - July 18th, 2013〕 players on the pitch, 4 field players and 1 goalkeeper, with a maximum 12 players on a team. * Internationally the game is divided into 2 periods of 20 minutes. (In the German Indoor league, they play 30 minute halves with the ability to call time outs as in basketball.) Halftime break is 15 minutes. In case of a regulation tie teams play up to two 5-minute golden-goal overtimes; otherwise, the game will be decided by penalty strokes (5 rounds for each team followed by sudden-death rounds in case of ties). * The players may not hit the ball, but only push it or deflect it, and may not raise the ball except in the shooting circle, with the purpose of scoring a goal. * The balls and the sticks are similar, but players prefer lighter sticks than for the outdoor game. The small field and sideboards make indoor field hockey a quick, technical and physical game. Some of the original rules eventually influenced outdoor hockey, such as unrestricted substitution. It is often an ideal game for field hockey players to develop vision on and off the ball, developing a better understanding of tactics and set plays. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Indoor field hockey」の詳細全文を読む スポンサード リンク
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