Harput Gulcan, Howard Jennifer Sebert, Mattacola Carl
J Orthop Sports Phys Ther. 2016 Nov;46(11):984-992. doi: 10.2519/jospt.2016.5896. Epub 2016 Oct 12.
Study Design Cross-sectional, controlled laboratory study. Background Quantification of muscular activation during different phases of functional activities is important to understand activation deficits in individuals who have undergone anterior cruciate ligament reconstruction (ACLR). Objectives To compare activation levels of the vastus medialis (VM), medial hamstrings (MH), and gluteus medius (GMed) muscles during the different phases of weight-bearing tasks between individuals who had undergone ACLR and healthy controls. Methods Surface electromyography was used to measure the activation levels of the VM, MH, and GMed muscles in 16 participants who had undergone ACLR (average time since surgery, 4 years) and 15 healthy participants during the reach and return phases of the Star Excursion Balance Test (SEBT) and the ascending and descending phases of a step-down task (SDT). Repeated-measures analyses of variance were performed to determine whether muscle activation levels differed between groups during different phases of the tasks. Results There were significant group-by-phase interactions for the GMed during both the SEBT and SDT. Gluteus medius activation was lower for the ACLR group during the return phase of the posteromedial direction of the SEBT compared to the control group (P = .03). During the SDT, GMed activation was higher for the ACLR group during the ascending phase than during the descending phase (P<.001), while the control group showed no difference between phases (P = .71). Conclusion Individuals who had undergone ACLR have similar VM and MH activation compared to healthy individuals during different phases of the SDT and SEBT. However, phase differences for GMed activity and decreased GMed activity relative to healthy individuals were observed among ACLR participants. J Orthop Sports Phys Ther 2016;46(11):984-992. Epub 11 Oct 2016. doi:10.2519/jospt.2016.5896.
横断面、对照实验室研究。背景：量化功能活动不同阶段的肌肉激活情况对于理解前交叉韧带重建（ACLR）个体的激活缺陷很重要。目的：比较前交叉韧带重建个体与健康对照组在负重任务不同阶段股内侧肌（VM）、内侧腘绳肌（MH）和臀中肌（GMed）的激活水平。方法：采用表面肌电图测量16例接受前交叉韧带重建的参与者（术后平均时间4年）和15例健康参与者在星形偏移平衡测试（SEBT）的前伸和返回阶段以及下台阶任务（SDT）的上升和下降阶段VM、MH和GMed肌肉的激活水平。进行重复测量方差分析以确定任务不同阶段组间肌肉激活水平是否存在差异。结果：在SEBT和SDT中，GMed均存在显著的组×阶段交互作用。与对照组相比，前交叉韧带重建组在SEBT后内侧方向返回阶段的臀中肌激活较低（P = 0.03）。在SDT中，前交叉韧带重建组在上升阶段的GMed激活高于下降阶段（P<0.001），而对照组各阶段无差异（P = 0.71）。结论：与健康个体相比，前交叉韧带重建个体在SDT和SEBT的不同阶段VM和MH激活相似。然而，在前交叉韧带重建参与者中观察到GMed活动的阶段差异以及相对于健康个体GMed活动降低。《骨科与运动物理治疗杂志》2016年；46(11):984 - 992。2016年10月11日在线发表。doi:10.2519/jospt.2016.5896 。
