Abstract：
This study was conducted to compare postural stability during repeated unilateral standing tasks between adults with and without chronic low back pain (LBP) while considering visual input. The study involved 26 participants with LBP and 39 control participants. Each participant performed three trials of standing tasks on the dominant limb using a stable platform. The Falls Efficacy Scale was utilized to assess fall-related self-efficacy and fear of falling due to potential physical frailty. The center of pressure (COP) sway excursion was analyzed at 10 mm and 20 mm thresholds for the time-in-boundary (TIB). The results indicated a significant fear of falling difference in the LBP group compared to the control group (t = 3.27, p = 0.001). The LBP group demonstrated a significant interaction between visual condition and TIB (F = 8.45, p = 0.01), particularly in the LBP group, which demonstrated a notable decrease in TIB at 10 mm (54.02 % compared to the control group\'s 70.40 %) and 20 mm (70.93 % compared to the control group\'s 85.92 %) thresholds during the second trial and at 10 mm (59.73 % compared to the control group\'s 73.84 %) during the third trial in the eyes open condition. Overall, visual condition demonstrated significant interactions on thresholds (F = 15.80, p = 0.001, η2p = 0.21) as well as trials × thresholds (F = 4.21, p = 0.04, η2p = 0.07). These findings indicate a potential adaptation in postural control among the LBP group with visual feedback. Further research is warranted to explore group differences when considering visual conditions and sway excursion thresholds.
摘要：
进行这项研究是为了比较有和没有慢性下腰痛（LBP）的成年人在反复进行单侧站立任务时的姿势稳定性，同时考虑视觉输入。该研究涉及26名LBP参与者和39名对照参与者。每位参与者使用稳定的平台在优势肢体上进行了三项站立任务试验。跌倒效能量表用于评估与跌倒相关的自我效能感和由于潜在的身体虚弱而跌倒的恐惧。在边界时间（TIB）的10mm和20mm阈值处分析了压力中心（COP）摇摆偏移。结果表明，与对照组相比，LBP组对下降的恐惧差异显着（t=3.27，p=0.001）。LBP组表现出视觉状况与TIB之间的显著交互作用(F=8.45,p=0.01),特别是在LBP组中，在第二次试验中，在睁眼状态下，TIB在10mm（与对照组的70.40％相比为54.02％）和20mm（与对照组的85.92％相比为70.93％）阈值以及在第三次试验中在10mm（与对照组的73.84％相比为59.73％）阈值显着降低。总的来说,视觉条件显示出阈值（F=15.80，p=0.001，η2p=0.21）以及试验×阈值（F=4.21，p=0.04，η2p=0.07）的显着相互作用。这些发现表明，具有视觉反馈的LBP组可能会适应姿势控制。在考虑视觉条件和摇摆偏移阈值时，有必要进行进一步的研究以探索群体差异。
