Pelvic incidence (PI)–lumbar lordosis (LL) mismatch has a significant destabilizing effect on the center of gravity sway in the static standing position. However, the association between spinopelvic alignment and balance during gait in healthy volunteers is poorly understood. The degree of PI–LL mismatch and trunk anterior tilt in the static standing posture influences dynamic balance during gait. In this study, 131 healthy volunteers were divided into two groups: harmonious group (PI − LL ≤ 10°; n = 91) and unharmonious group (PI − LL > 10°; n = 40). A two-point accelerometer system was used for gait analysis; accelerometers were attached to the pelvis and upper trunk to measure acceleration in the forward–backward, right–left, and vertical directions so that sagittal (front–back) deviation width, coronal (right–left) width, and vertical width and their ratios were calculated. Measurements were compared between the two groups, and correlations between alignment and accelerometer data were examined. The harmonious group showed a negative correlation between pelvic sagittal width and PI – LL, pelvic tilt (PT), and sagittal vertical axis (SVA) (correlation coefficient ρ = −0.42, −0.38, and −0.4, respectively), and a positive correlation between sagittal ratio and PI − LL (ρ = 0.35). The unharmonious group showed a positive correlation between pelvic sagittal width and PI and PT (ρ = 0.43 and 0.33, respectively) and between sagittal ratio and SVA (ρ = 0.32). The unharmonious group showed a positive correlation between upper trunk sagittal width and PI − LL and PT (ρ = 0.38 and 0.36, respectively). The association between spinal alignment and gait parameters differs depending on the presence or absence of PI–LL mismatch. The degree of pelvic compensation and trunk anterior tilt during static standing were associated with unstable gait balance.

中文翻译：

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脊柱骨盆代偿与不稳定步态相关吗？：使用全脊柱 X 射线和两点加速度计对健康成人步态进行分析

骨盆倾角（PI）-腰椎前凸（LL）不匹配对静态站立位置的重心摇摆具有显着的不稳定影响。然而，人们对健康志愿者的脊柱骨盆排列与步态平衡之间的关系知之甚少。静态站立姿势下PI-LL不匹配的程度和躯干前倾会影响步态的动态平衡。在这项研究中，131 名健康志愿者被分为两组：和谐组（PI − LL ≤ 10°；n = 91）和不和谐组（PI − LL > 10°；n = 40）。使用两点加速度计系统进行步态分析；将加速度计安装在骨盆和上躯干上，测量前后、左右和垂直方向的加速度，从而获得矢状（前后）偏差宽度、冠状（左右）宽度和垂直宽度及其比率被计算出来。比较两组之间的测量结果，并检查对准和加速度计数据之间的相关性。和谐组显示骨盆矢状宽度与 PI – LL、骨盆倾斜度 (PT) 和矢状垂直轴 (SVA) 呈负相关（相关系数分别为 ρ = -0.42、-0.38 和 -0.4），并且呈正相关。矢状比与 PI − LL 之间的相关性 (ρ = 0.35)。不和谐组显示骨盆矢状宽度与PI和PT（分别为ρ=0.43和0.33）以及矢状比与SVA（ρ=0.32）之间呈正相关。不和谐组显示上躯干矢状宽度与 PI – LL 和 PT 呈正相关（分别为 ρ = 0.38 和 0.36）。脊柱排列与步态参数之间的关联根据 PI-LL 不匹配的存在与否而有所不同。静态站立时骨盆代偿和躯干前倾的程度与不稳定的步态平衡有关。