Vogt L, Pfeifer K, Portscher M, Banzer W
Johann Wolfgang Goethe-University, Department of Sports Medicine, Frankfurt/Main.
J Rehabil Res Dev. 2000 Sep-Oct;37(5):495-9.
Lumbar corsets have been recommended for low back pain patients as a way of stabilizing the lumbar region, facilitating flexion movements, and reducing pain. However, little is known about how these devices affect lumbar motion. To determine the degree of changes in the lumbar region, our approach was to quantify three-dimensional kinematic data of the pelvis in harness-supported treadmill walking. Twelve healthy subjects (age=32+/-11.8 years) walked on a motorized treadmill at 4.5 km/h with and without wearing a lumbar corset. Three external markers overlying the sacrum were tracked by three ultrasound microphones, determining a local coordinate system, to obtain pelvic motions in the frontal, sagittal, and transverse planes. Raw kinematic data were low-pass filtered and normalized relative to the right heel strike. Mean values for net angular displacements of the pelvis were calculated for each plane within the 5th and 95th percentile. The Student's t-test demonstrated significant differences (P<0.001) between the corset/no-corset conditions in the frontal plane. An average 40% decrease in the relative pelvis up- and downward movement occurred in the frontal plane (4.1 degrees+/-2.9 degrees vs. 7.1 degrees+/-3.3 degrees). The analysis revealed no significant differences of net angular displacements in the sagittal (2.9 degrees+/-1.4 vs. 3.4 degrees+/-1.7 degrees) and the transverse planes (4.4 degrees+/-2.6 degrees vs. 4.3 degrees+/-2.1 degrees).
腰椎护具已被推荐给腰痛患者，作为稳定腰椎区域、促进屈曲运动和减轻疼痛的一种方式。然而，对于这些器械如何影响腰椎运动，人们知之甚少。为了确定腰椎区域的变化程度，我们的方法是在束带支撑的跑步机行走过程中量化骨盆的三维运动学数据。12名健康受试者（年龄=32±11.8岁）在电动跑步机上以4.5公里/小时的速度行走，分别穿着和不穿腰椎护具。三个覆盖在骶骨上的外部标记由三个超声麦克风跟踪，确定一个局部坐标系，以获取骨盆在额状面、矢状面和横断面上的运动。原始运动学数据进行低通滤波，并相对于右足跟触地进行归一化。计算每个平面内第5和第95百分位数之间骨盆净角位移的平均值。学生t检验显示，在额状面的护具/无护具条件之间存在显著差异（P<0.001）。在额状面，骨盆相对上下运动平均减少40%（4.1度±2.9度对7.1度±3.3度）。分析显示，矢状面（2.9度±1.4度对3.4度±1.7度）和横断面（4.4度±2.6度对4.3度±2.1度）的净角位移没有显著差异。
