J Back Musculoskelet Rehabil. 2023;36(3):661-667. doi: 10.3233/BMR-220072.
Sway-back posture in the sagittal profile is a commonly adopted poor standing posture. Although the terms, definitions, and adverse health problems of sway-back posture are widely used clinically, few studies have quantified sway-back posture.
To investigate spinal sagittal alignment in sway-back posture while standing based on global and regional angles using inertial measurement units (IMUs).
This cross-sectional study recruited 30 asymptomatic young adults. After measuring the sway angle while standing, the participants were divided into sway-back and non-sway-back groups (normal thoracic group). Each participant stood in a comfortable posture for 5 seconds with IMUs at the T1, T7, T12, L3, and S2 levels. Then, we measured the global and regional lumbar and thoracic angles and sacral inclination in the standing position.
Although there was no difference in the global lumbar angle, there was a difference in regional lumbar angles between the two groups. The normal thoracic group had balanced lumbar lordosis between the upper and lower lordotic arcs, whereas the sway back group tended to have a flat upper lumbar angle and increased lower lumbar angle.
It is useful to assess the global and regional angles in the spinal sagittal assessment of individuals with sway-back posture.
后倾姿势是一种常见的不良站立姿势。虽然后倾姿势的术语、定义和相关健康问题在临床上被广泛使用，但很少有研究对其进行量化。
使用惯性测量单元（IMU）基于整体和局部角度来研究站立位时的脊柱矢状面排列。
本横断面研究招募了 30 名无症状的年轻成年人。在测量站立时的倾斜角度后，将参与者分为后倾和非后倾组（正常胸段组）。每个参与者在 T1、T7、T12、L3 和 S2 水平上使用 IMU 以舒适的姿势站立 5 秒钟。然后，我们测量了站立位的整体和局部腰椎和胸椎角度以及骶骨倾斜度。
虽然两组之间的整体腰椎角度没有差异，但局部腰椎角度存在差异。正常胸段组的上下腰椎弧之间的腰椎前凸平衡，而后倾组的上腰椎角度趋于平坦，下腰椎角度增加。
在后倾姿势的脊柱矢状面评估中，评估整体和局部角度是有用的。
