研究論文Original Articles ［目的］外反母趾は，中高年においてしばしば問題となる変形である．外反母趾の存在は他部位への運動学的変化を及ぼすことが報告されていることから，若年者から予防的な介入が必要かもしれない．しかし，若年者において外反母趾が他部位に及ぼす影響は明らかではない．本研究では，若年女性を対象に足部アライメントを調査し，外反母趾と内側縦アーチおよび踵骨角度との関係を明らかにすることを目的とした． ［方法］大学生女性81 名162足を対象とし，第一趾側角度，アーチ高率，Leg Heel Alignment を測定した．第一趾側角度とアーチ高率・Leg Heel Alignment それぞれの相関関係と，アーチ高率およびLeg Heel Alignment において外反母趾あり群となし群の比較を行った． ［結果］各項目間に有意な相関関係は認められなかった．群間比較ではアーチ高率で有意差を認め（p<0.01）， 外反母趾あり群が有意に低下していた． ［結論］若年者の外反母趾を有する足部では，内側縦アーチは低下し，踵骨角度には影響しないことが示唆された． [Objective] Hallux valgus is often a problematic deformation in middle-aged and elderly people. Preventive intervention may be necessary for young people, as the presence of Hallux valgus has been reported to exert kinetic changes to other sites. However, the influence of Hallux valgus on other parts of the body in young people is unclear. In this study, we aimed to investigate foot alignment in young women with Hallux valgus and to clarify the relationship between Hallux valgus and the medial longitudinal arch and calcaneus angle. [Methods] The study subjects were 81 female college students （162 legs）. The first toe side angle, arch height ratio, and leg-heel alignment were measured for the legs. The correlations of arch height ratio to the first toe side angle and leg-heel alignment were compared between the group with and the group without Hallux valgus. [Results] No significant correlation was found between the items. A significant difference in arch height ratio （p < 0.01） was observed between the groups, and the group with Hallux valgus had a significantly decreased arch height ratio. [Conclusion] This study suggests that in feet with Hallux valgus in young persons, the medial longitudinal arch decreases and does not affect the calcaneus angle
