Takala Esa-Pekka, Korhonen Ilkka, Viikari-Juntura Eira
Department of Physiology, Musculoskeletal Research Unit, Finnish Institute of Occupational Health, Helsinki, Finland.
Clin Biomech (Bristol). 1997 Oct;12(7-8):429-437. doi: 10.1016/s0268-0033(97)00033-8.
To investigate the day-to-day reproducibility and long-term (9 months) stability of variables of postural control, and the associations of these variables with low-back and lower-extremity pain in a working population. DESIGN: Test-retest measurements of 18 healthy subjects. Cross-sectional study of 165 working women and 343 men. BACKGROUND: Sudden loss of postural balance may result in microtraumas of back structures. Therefore workers with decreased postural control may run an increased risk of low-back pain. There are few reports describing the reproducibility of force-plate-based posturography. METHODS: Amplitude and velocity of postural sway were measured with a force-plate in a two-feet stance with eyes open and closed, and in a one-foot stance with eyes open. A stepping response test was developed to measure the dynamic components of balance. RESULTS: The mean differences between the repeated measurements were generally 5-10% and the standard deviations of these differences were up to a quarter or one third of the mean measurement values. Sway velocity showed the best overall reproducibility. Men had a larger sway than women independent of age and anthropometry. The group of non-symptomatic subjects showed wide variation and a slightly lower sway than the groups with low-back or lower-extremity pain. CONCLUSIONS: Postural sway has moderate stability, wide variation, and slight associations with low-back symptoms in a working population.
研究姿势控制变量的日常可重复性和长期（9个月）稳定性，以及这些变量与工作人群中腰背痛和下肢疼痛的相关性。设计：对18名健康受试者进行重测测量。对165名职业女性和343名男性进行横断面研究。背景：姿势平衡的突然丧失可能导致背部结构的微创伤。因此，姿势控制能力下降的工人患腰背痛的风险可能会增加。很少有报告描述基于测力平台的姿势描记法的可重复性。方法：在双脚站立睁眼、闭眼以及单脚站立睁眼时，使用测力平台测量姿势摆动的幅度和速度。开发了一种踏步反应测试来测量平衡的动态成分。结果：重复测量之间的平均差异一般为5% - 10%，这些差异的标准差高达平均测量值的四分之一或三分之一。摆动速度总体上具有最佳的可重复性。无论年龄和人体测量学因素如何，男性的摆动幅度都大于女性。无症状组表现出较大的变异性，且摆动幅度略低于有腰背痛或下肢疼痛的组。结论：在工作人群中，姿势摆动具有中等稳定性、较大变异性，且与腰背痛症状有轻微关联。
