Fujita Remi, Ota Susumu, Ogawa Yukari, Ota Hiroki
Department of Rehabilitation and Care, Seijoh University: 2-172 Fukinodai, Tokai, Aichi 476-8588, Japan.
Department of Physical Medicine and Rehabilitation, Nagoya Tokushukai General Hospital, Japan.
J Phys Ther Sci. 2021 Apr;33(4):329-333. doi: 10.1589/jpts.33.329. Epub 2021 Apr 6.
[Purpose] To investigate the effect of performing a draw-in maneuver (DI) on knee adduction moment (KAM) and hip and trunk muscle activities while walking. [Participants and Methods] We included 30 healthy young adults (21.5 ± 0.6 years, 16 males and 14 females) in this study. We measured the KAM and lever arm while participants walked with either a normal gait or a DI gait. We also performed surface electromyography (EMG) of the hip and trunk muscles (i.e., internal oblique abdominal muscle [IO], external oblique abdominal muscle [EO], multifidus muscle [MF], and gluteus medius muscle [GM]). [Results] The 1st peak of the KAM was significantly lower when walking with a DI gait compared to when walking with a normal gait. The integrated EMG activity of the IO, EO, and GM during the 1st half of the stance phase, and of the IO and EO during the 2nd half of the stance phase was significantly higher during the DI than during normal gait. [Conclusion] Compared with a normal gait, a DI gait leads to a decrease in the 1st peak of the KAM as a result of the shorter lever arm, and an increase in the muscular activity of the GM, IO, and EO.
[目的] 研究在行走时进行内收动作（DI）对膝关节内收力矩（KAM）以及髋部和躯干肌肉活动的影响。[参与者与方法] 本研究纳入了30名健康的年轻成年人（21.5±0.6岁，男性16名，女性14名）。我们在参与者以正常步态或DI步态行走时测量了KAM和力臂。我们还对髋部和躯干肌肉（即腹内斜肌[IO]、腹外斜肌[EO]、多裂肌[MF]和臀中肌[GM]）进行了表面肌电图（EMG）检查。[结果] 与正常步态行走时相比，以DI步态行走时KAM的第一个峰值显著降低。在站立期的前半段，DI期间IO、EO和GM的肌电图积分活动，以及站立期后半段IO和EO的肌电图积分活动均显著高于正常步态期间。[结论] 与正常步态相比，DI步态由于力臂较短导致KAM的第一个峰值降低，并且GM、IO和EO的肌肉活动增加。
