Neumann D A, Hase A D
Program in Physical Therapy, Walter Schroeder Complex, Marquette University, Milwaukee, WI 53233.
J Orthop Sports Phys Ther. 1994 May;19(5):296-304. doi: 10.2519/jospt.1994.19.5.296.
Decreasing the relative force demands on the hip abductor muscles may reduce hip joint forces. The purpose of this study was to use surface electromyography (EMG) to determine the relative demand on the hip abductor muscles as subjects walked and carried single hand-held loads of multiple weights. Thirty healthy, college-aged subjects carried single hand-held loads by their side. The loads weighed between 3 and 30% of body weight. Loads were carried in a position either ipsilateral or contralateral to a given hip side. Normalized EMG (%EMG) was collected during the middle stance phase of walking. The amount of %EMG remained statistically equal to or less than the no-load EMG baseline for all ipsilateral-held loads and greater than the no-load EMG for all contralateral-held loads above 3% body weight. Load positions and weights that generated %EMG levels less than or equal to the no-load baseline most likely offer a degree of hip joint protection for persons with hip disability.
降低髋外展肌的相对力量需求可能会减少髋关节受力。本研究的目的是使用表面肌电图（EMG）来确定受试者行走并单手携带多种重量的负载时，髋外展肌的相对需求。30名健康的大学生年龄受试者在身体一侧单手携带负载。负载重量在体重的3%至30%之间。负载放置在与给定髋关节同侧或对侧的位置。在步行的中间支撑阶段收集标准化肌电图（%EMG）。对于所有同侧携带的负载，%EMG量在统计学上保持等于或小于无负载EMG基线，而对于所有体重超过3%的对侧携带的负载，%EMG量大于无负载EMG。产生的%EMG水平小于或等于无负载基线的负载位置和重量，最有可能为髋关节残疾患者提供一定程度的髋关节保护。
