Biomechanics Laboratory, Department of Kinesiology, University of Massachusetts, Amherst, MA 01003, USA.
Res Sports Med. 2009;17(4):260-73. doi: 10.1080/15438620903352057.
The purpose of this retrospective study was to examine lower extremity joint stiffness between runners with and without low back pain. We compared data from three groups: current low back pain (LBP), resolved pain (RES), and a control (CTRL) group of runners. We hypothesized that the LBP group would exhibit increased ankle, knee, and hip joint stiffness when compared with the other groups. Subjects ran on a force treadmill at 3.8 m*s(-1) while data were collected. Joint stiffness was determined from the joint moment-angle profiles. Differences were observed in knee joint stiffness, with the LBP group exhibiting the greatest stiffness values. No differences in ankle or hip joint stiffness were observed. These data suggest that the LBP group of runners may not attenuate the foot-ground impact to the same level as the other groups. The decreased attenuation may increase the level of the shock to the low back region, thus potentially increasing the load on the low back.
本回顾性研究旨在探讨有无下腰痛的跑步者下肢关节僵硬程度的差异。我们比较了三组数据：当前腰痛（LBP）组、疼痛缓解（RES）组和跑步者对照组（CTRL）。我们假设与其他组相比，LBP 组的踝关节、膝关节和髋关节僵硬度会增加。受试者在 3.8m/s 的力跑步机上跑步时，采集数据。关节僵硬度通过关节力矩-角度曲线确定。研究观察到膝关节僵硬度存在差异，LBP 组表现出最大的僵硬度值。踝关节和髋关节僵硬度没有差异。这些数据表明，LBP 组的跑步者可能无法将足地冲击衰减到与其他组相同的水平。衰减的减少可能会增加对下背部区域的冲击水平，从而可能增加对下背部的负荷。
