@article{oai:naruto.repo.nii.ac.jp:00028132,
 author = {木原, 資裕 and 山田, 昌弘 and 南, 隆尚 and 西本, 浩章 and 松井, 敦典 and KIHARA, Motohiro and YAMADA, Masahiro and MINAMI, Takahisa and NISHIMOTO, Hiroaki and MATSUI, Atunori},
 journal = {鳴門教育大学研究紀要, Research bulletin of Naruto University of Education},
 month = {Mar},
 note = {This study was done for the purpose of getting material which considers the state of senior citizens, focusing on Masters swimming tournaments and considering actual participation and declination of the records with aging. We got the following results. 1) The number of participatiing teams in Japanese masters swimming tournamens is rising every year, but the number of registrations decreases from 2016．We found out that 2017 age divisions under 65 years old decreased. 2) Every time passed through a year, participants in the higher age divisions were increased. Which a burden to a body seems big for the senior citizen long distance during the freestyle, butterfly and individual medley, the participant was increasing. 3) In Japanese masters swimming tournaments，22nd kind different from how to swim in the distance of the gender was carried out. To estimate the record by the fixed standard, we did the following definition of the PI index. {Performance Index}＝[Record of the age division which becomes the standard]/[Record of target age division] 4) The butterfly seems to become quite difficult for senior citizens. 5) In the world Masters world record, there was almost no deffierence between genders less than 100 years old in the average PI index of each swimming tournament events. 6) In the world Masters world record, swimming performance level made the standard at 30-34 years old was about 60 percent by 85-89 years old, about 50 percent by 85-89 years old. 7) In the japanese masters japanese record, the average PI index of each swimming tournament evevnts were almost no difference between the sexes is judged by less than 80 years old as world record, but there was difference between the sexes of the average IP index by a Japanese record of more than 80 years old. 8) The time which is the first half in eighties from the second half of seventies in the Japanese record maintenance rate of the men and women cuts 0．9, it's a turning point of swimming performance.},
 pages = {373--382},
 title = {マスターズ水泳大会におけるパフォーマンス分析 : 年齢区分と記録の推移を中心に},
 volume = {34},
 year = {2019},
 yomi = {キハラ, モトヒロ and ヤマダ, マサヒロ and ミナミ, タカヒサ and ニシモト, ヒロアキ and マツイ, アツノリ}
}