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==History== Gymnastics wall bars (a.k.a. gymnastics ladder) were invented at the beginning of the 19th century by the Swedish teacher Per Henrik Ling, who when suffering from arthritis, realized the therapeutic potential of wall-bars exercise. With the support of the Swedish king, Ling founded “The Royal Institute for Gymnastics”, where he taught gymnastics as an art, which later became the working system in whole Europe. He later invented the vaulting box. With the arrival of emigrants in America, the wall bars were quickly adopted in the USA, and are also known as ''stall bars''. Gymnastics wall bars are a multifunction device, made of lamellar and beech timber. They can be manufactured in different sizes, from the recovery, for children up to the double, which may have a size of 2.50 x1, 70 m. The parallel bars are made of beech or maple wood and commonly number 7, 14, or 16 pieces. The top bar is extended further than the other bars to facilitate exercises where the user hangs vertically. The bars are 40 mm thick and oval shape. An incline board or pull-up bar can be attached to the bars. For spine disorders such as scoliosis, it is advisable to consult an orthopedist before performing any exercises at the wall bars. 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「Wall bars」の詳細全文を読む スポンサード リンク
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