着地時の体幹前傾が膝関節周囲筋に与える影響 Influence of bending the trunk forward during drop landing on muscles around the knee joint

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The aim of the present study was to investigate whether personal hamstring muscular activation increased by landing with the trunk bent forward. First, 14 healthy female university students were instructed to perform normal drop landing from a 40 cm-high box on both legs. Second, subjects were directed to perform drop landing with the trunk bent forward. Using images obtained from a high-speed video camera, the upper center of mass was calculated in the sagittal plane for determining the differences in these landings. For 0.1 second after toe contact, the muscular activation of quadriceps femoris and hamstring muscles was analyzed using an electromyogram (EMG), and these findings were compared between the 2 types of landings. There was no significant difference in the activation of quadriceps femoris, but the activation tended to decrease during landing with the trunk bent forward. However, the activation of hamstring muscles increased significantly during landing with the trunk bent forward compared with that during normal landing. During landing with the trunk bent forward, the activation of hamstring muscles increased, and the activation of quadriceps femoris tended to decrease. Because contraction of hamstring muscles decreases tension in the anterior cruciate ligament, the findings of this study may help in the prevention of anterior cruciate ligament (ACL) injury.

収録刊行物

  • 体力科學

    体力科學 61(1), 89-93, 2012-02-01

    一般社団法人日本体力医学会

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各種コード

  • NII論文ID(NAID)
    10030139981
  • NII書誌ID(NCID)
    AN00137986
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    0039906X
  • NDL 記事登録ID
    023513639
  • NDL 請求記号
    Z7-301
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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