Department of Arts and Sciences, Osaka Kyoiku University, Osaka, Japan.
J Electromyogr Kinesiol. 2010 Jun;20(3):550-7. doi: 10.1016/j.jelekin.2009.07.006. Epub 2009 Aug 21.
This study aims at determining the applicability of a segment weight dynamic movement (SWDM) method as an alternative for normalizing gait EMGs in comparison with the conventional isometric maximal voluntary contraction (MVC) method. The SWDM method employs reference exercises, each being a dynamic, repetitive movement of a joint under the load of the segment weight (i.e., the total weight of all segments distal to the joint). EMG amplitudes of 28 healthy male subjects walking at 120 steps/min were normalized by the two methods. CV and VR were used to assess the inter-individual variability of both the normalized gait EMG for 8 muscles. The CV and VR values attained with the two methods were close to each other, as well as to those obtained by other researchers using the isometric MVC method. These results suggest that the SWDM method has a comparable level of applicability to gait EMG normalization as the isometric MVC method.
本研究旨在确定节段权重动态运动（SWDM）方法作为一种替代常规等长最大自主收缩（MVC）方法来归一化步态肌电图的适用性。SWDM 方法采用参考运动，每个运动都是关节在节段重量（即关节远端所有节段的总重量）下的动态、重复运动。通过两种方法对 28 名健康男性以 120 步/分钟行走时的 28 名健康男性的肌电图进行归一化。使用 CV 和 VR 评估了 8 块肌肉的归一化步态肌电图的个体间变异性。两种方法获得的 CV 和 VR 值彼此接近，也接近其他使用等长 MVC 方法的研究人员获得的值。这些结果表明，SWDM 方法在步态肌电图归一化方面的适用性与等长 MVC 方法相当。
