Comparison study of the menstrual status, bone mineral density, and stress fracture incidence in collegiate female athletes

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  • Kobayashi Tetsuro
    Graduate School of Health and Sport Science, Nippon Sport Science University
  • Seki Shotaro
    Graduate School of Health and Sport Science, Nippon Sport Science University
  • Matsui Kaori
    Faculty of Sport Science, Nippon Sport Science University
  • Hwang Inkwan
    Faculty of Sport Science, Nippon Sport Science University

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  • 大学女子アスリートにおける月経状況、骨密度及び疲労骨折調査に関する報告
  • ダイガク ジョシ アスリート ニ オケル ゲッケイ ジョウキョウ 、 コツミツド オヨビ ヒロウ コッセツ チョウサ ニ カンスル ホウコク

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<p>We investigated menstrual status, bone mineral density, and history of stress fracture in 369 female athletes (age, 19.4±1.1 years; height, 160.2±4.9 cm; weight, 56.8±6.8 kg) from twelve sports clubs at a physical education university. Menstrual status and history of stress fracture were obtained from a questionnaire survey. Bone mineral density (BMD) was measured by dual-energy X-ray absorptiometry scan. In the most recent one-year menstrual cycle of the participants, 9.1% had amenorrhea and 32.9% had menstrual abnormalities such as menstrual irregularly or oligomenorrhea, which is similar to the rate of top Japanese female athletes. The total body BMD tended to be lower for athletes in long-distance running, esthetic, and aquatic type sports, and the lumbar spine BMD of long-distance track and field athletes was especially lower than that of the young adult mean (Z score=-0.4). The prevalence of stress fracture was 18.4% in all participants, and was higher in athletes participating in long-distance running in track and field, weightlifting, and jumping/throwing in track and field, in that order. These findings suggest that the risk of stress fracture is not limited to BMD, but is sport-specific.</p>

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