O'Brien, WP (English spelling)

Japanese: O'Brien,W.P.(英語表記)OBrienWP
O'Brien, WP (English spelling)

…However, as with the pole vault, this would not have been possible without improvements to the landing surface, changing the hard sand area to a soft pit covered with soft rubber. In the 1950s, the development of the backward stepping technique in the shot put by WPO'Brien (USA) and the development of the quadruple turn technique in the hammer throw contributed greatly to improving records. There have also been astonishing advances in measuring time and distance. …

*Some of the terminology explanations that mention "O'Brien, WP" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…しかし,これも棒高跳びの場合と同様,かつて硬い砂場だった落下場所がソフトラバーを敷き詰めた柔らかいピットに変わったという着地面の改良がなければ実現しなかったことであろう。1950年代に砲丸投げで後ずさりにステップする投法を考え出したオブライエンW.P.O’Brien(アメリカ)や,ハンマー投げでの4回転ターンの技術開発などの成果は記録向上に多大の貢献をした。 タイムの計測,距離の測定も驚異的な進歩を遂げた。…

※「O'Brien,W.P.」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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