クラシックバレエの動作は，広い股関節外旋可動域を要するターンアウト(TO)から成り立ち，可動域不足でのTOは障害につながる可能性がある．本研究はダンサーのTO能力が障害発生に及ぼす影響の検討を目的とし，TO能力測定機器の開発，腰部下肢への負荷の評価，障害調査を実施した．その結果、TO能力の低いダンサーでは障害発生率が高いことが示され，TO能力を把握することが障害発生の予防に繋がる可能性を示唆できた． / Ballet movements always begin with turnout which requires large hip external range of motion. Performing turnout without acquiring sufficient hip external range of motion is believed to stress dancer’s body. The aim of this study was to evaluate the relationship between turnout and injuries among ballet dancers. We conducted following experiments, a novel device development for turnout assessment, kinetic and kinematic analysis of lower body contribution during turnout, injury diagnosis and survey. medical screening. Results proved dancers with smaller hip external rotation suffer more injuries and indicated knowing own TO range would take a part in injury prevention. / 博士(スポーツ健康科学) / Doctor of Philosophy in Health and Sports Science / 同志社大学 / Doshisha University