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ski pole
Ski poles, also referred to as Poles, are used by skiers for balance and propulsion.〔(【引用サイトリンク】title=Maximizing Pole Glide )〕 Modern ski poles are most commonly made from aluminum and carbon fiber, though materials such as bamboo are still used. Poles are used in alpine skiing, freestyle skiing (with the exception of aerials), and cross-country skiing. Ski jumpers do not use poles.
==History==
, the earliest ski pole was found in Sweden and dates back to 3623 BC, while the earliest depiction of a man with a ski pole was found in Norway in the form of a cave painting, dated at 4000 BC.〔(【引用サイトリンク】url=http://www.steinkjer-kommune.net/eggevandring/egge/index.php?art_id=310 )〕 Early skiers would use this pole for the purposes of balancing, braking, and turning.〔 Alpine societies such as those in Nordic regions or the Altai mountains used their ski poles to hunt as well, giving them spear-like qualities. Skiers began to use two ski poles in 1741. This provided greater balance than one pole could provide and made pushing through the snow easier.〔
Early ski poles were made of pine and bamboo, materials which today are used for novelty poles.〔 US patents for steel ski poles began in 1933 when John B. Dickson invented a new design calling for the use of steel as the shaft material. This construction was superseded by Edward L. Scott, who is credited with popularizing the lightweight aluminum ski pole in 1959, deriving his modern design from golf club shafts. This new stiff and lightweight pole made it easier for skiers to pole-plant and initiate fast, short turns.〔
The most modern material used in ski pole production is carbon fiber. A patent has been filed on a biocomposite material that can be used for ski poles, but this design has yet to be manufactured. Axel Composites has a patent for carbon fiber ski poles dating back to 1975, however, inventor David P. Goode's improved design from 1989 became the first widely produced. The carbon fiber pole builds on the same qualities of the aluminum pole: lightness and stiffness while being extremely strong.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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