著者

藪内 ふじ江 市川 孝夫 荒川 みゆき 千葉 吟子

出版者

産業医科大学学会

雑誌

産業医科大学雑誌 (ISSN:0387821X)

巻号頁・発行日

vol.6, no.1, pp.47-55, 1984-03-01

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現代の初潮平均年令は我が国の初潮年令の年次推移によっても欧米諸国の年次推移によっても同じ傾向で100年間に3年から4年, 10年間に4カ月位で若年化していることが報告されている. 体操競技では年々技が高度化し筋肉に強い刺激を与える影響からか全国高校選手権から世界選手権までの一部の選手の資料ではあるが初潮の若年化とは逆に選手の初潮は遅れの傾向にある事が判った. 例えば, 対照群である一般の女子グループは14才で既潮率が100%近くに達しているが世界選手権グループは24%と3年も遅れている. 16才では一般の女子グループが100%に対し世界選手権グループは60%と既潮率が低い. 最終的には選手群は対照群に比べて初潮が3年から5年遅れている. 筋肉の過重負担が月経周期の不定期にもつながり影響の大きい事が推察される.

著者

中村 本勝 市川 孝夫 小林 正憲

出版者

久留米工業大学

雑誌

久留米工業大学研究報告 (ISSN:03896897)

巻号頁・発行日

vol.22, pp.107-112, 1998-12-20

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As a sport for people of advanced age, gateball is declining in popularity. The major causes are mental stress resulting from athletic competition and physical illness affecting the sport's elderly participants. Gateball's decline has intensified due to the growing popularity of sports like ground golf. This has led to the weakening of gateball teams because there are not enough players to take part in games. Furthermore, the lack of newcomers has resulted in an insufficient number of people engaged in team management. Regarding the causes of mental stress, gateball rules mandate severe penalties in the event of an "outside release" or "out-of-bounds" play. This peculiar rule produces high stress among beginning players. Among the elderly members of gateball clubs, in addition, qualified individuals are granted a high social position or ranking. This is a major source of stress, as it promotes resistance to scolding or pressure from a team coach or manager. Such factors produce a sense of incongruity for gateball and there are many cases in which low player participation has been caused. For these reasons, it is difficult for talented persons to become involved in gateball management. The writer thinks that the following things will be necessary for a comeback or revival in gateball's popularity. Demonstrations of activity and support for all team members will be needed to give returning participants a sense of vitality. Then if the gateball player population increases, team formation will become strengthened by degrees. For this to be accomplished, the cooperation of concerned persons in cities, towns and villages is indispensable. The writer considers gateball to be an important matter for the aging society.