2022 Fiscal Year Final Research Report
The effect of vastus medialis on leg alignment in young adults and infants
Project/Area Number |
19K19929
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Research Category |
Grant-in-Aid for Early-Career Scientists
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Allocation Type | Multi-year Fund |
Review Section |
Basic Section 59010:Rehabilitation science-related
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Research Institution | Seijoh University |
Principal Investigator |
Koun Yamauchi 星城大学, リハビリテーション学部, 研究員 (30610414)
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Project Period (FY) |
2019-04-01 – 2023-03-31
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Keywords | 変形性膝関節症 / 膝内反モーメント / 内側広筋 / O脚 / 肥満 / 小児発達 |
Outline of Final Research Achievements |
Healthy young adults with varus knee alignment had a larger knee adduction moment during walking than those with knee valgus alignment, which indicated that adults with varus knee alignment had the greater load on the medial knee joint. However, even in adults with knee varus alignment, those with larger vastus medialis muscle mass had a smaller knee adduction moment. This result showed that the develpoment and progression of medial knee osteoarthritis might be prevented by increasing the vastus medialis mass. Motor development up to 1 year of age had no relationships with varus knee alignment in 1- to 3-year-old infants. On the other hand, 2- and 3-year-old infants who had a larger subcutaneous fat thickness had a greater varus knee alignment and a smaller vastus medialis mass. Obesity observed at 1- to 3 years of age may influence varus knee alignment and the development of the vastus medialis.
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Free Research Field |
整形外科学
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Academic Significance and Societal Importance of the Research Achievements |
O脚は、膝関節の内側にかかる負担が大きくなり、内側型変形性膝関節症になりやすいことがいわれている。本研究では、内側広筋の筋量が大きいと、膝関節の内側にかかる負担を軽減できる可能性があり、内側広筋を発達させる運動療法の開発に期待したい。また、O脚は3歳児までに自然矯正されることが分かっていたが、なぜ個人差があるのか不明であった。本研究から、歩行を開始してから、3歳児までの栄養過多や運動不足などが、O脚の自然矯正を不十分にしていることが分かった。同時に、肥満は、内側広筋の発達にも悪影響を及ぼすことから、この時期の適切な栄養管理や運動指導が重要になってくると考えられる。
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