Influence of Foot and Ankle Alignment on Knee Kinematics and Muscle Activity in Single-Leg Drop Landing

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  • KANEKO Masaaki
    Department of Physical Therapy, Faculty of Health Science Technology, Bunkyo Gakuin University 2) Department of Sports Medicine, Graduate School of Health and Sports Science, Juntendo University
  • OKAZAKI Michie
    Department of Physical Therapy, Faculty of Health Science Technology, Bunkyo Gakuin University
  • KAMIJO Fumiko
    Department of Physical Therapy, Faculty of Health Science Technology, Bunkyo Gakuin University
  • UEDA Yasuhisa
    Department of Physical Therapy, Faculty of Health Science Technology, Bunkyo Gakuin University
  • KAKIZAKI Fujiyasu
    Department of Physical Therapy, Faculty of Health Science Technology, Bunkyo Gakuin University
  • SAKURABA Keishoku
    2) Department of Sports Medicine, Graduate School of Health and Sports Science, Juntendo University

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Other Title
  • 足部・足関節アライメントが片脚着地動作時の動的下肢アライメントと着地直前直後筋活動に及ぼす影響
  • ソクブ ソクカンセツ アライメント ガ ヘンキャク チャクチ ドウサジ ノ ドウテキ カシ アライメント ト チャクチ チョクゼン チョクゴ キン カツドウ ニ オヨボス エイキョウ

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Abstract

[Purpose] This study investigated the factors of ACL injury risk from the relationship between the foot, ankle alignment and muscle activity before and after landing. [Subjects] The subjects were 27 healthy adult males. [Methods] We measured the angle of maximum knee valgus and maximum knee flexion after left single-leg landing, electromyographical activity immediately before and after landing, foot and ankle alignment and conducted the navicular drop test. [Results] We found a significant negative correlation between maximum knee valgus angle and the navicular drop test. A comparison of the muscle activity before and after landing with the high group and the low group of navicular drop test showed significantly greater muscle activity of the semitendinosus in the low group. [Conclusion] This finding suggests that the navicular drop test would be helpful for identifying players likely to suffer ACL injury, and in injury prevention and postoperative rehabilitation programs.<br>

Journal

  • Rigakuryoho Kagaku

    Rigakuryoho Kagaku 26 (1), 27-31, 2011

    The Society of Physical Therapy Science

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