Park Kyue-Nam, Kim Si-Hyun
Department of Physical Therapy, Jeonju University, Jeonju-si, Jeonrabuk-do, South Korea.
Department of Physical Therapy, Sangji University, Wonju-si, South Korea.
Iran J Public Health. 2022 Sep;51(9):2069-2077. doi: 10.18502/ijph.v51i9.10562.
A slouched lumbar posture during sitting is risk factor for the low back pain (LBP). Various chairs have been used to maintain sagittal lumbar lordosis and sacral alignment during sitting. We aimed to demonstrate the effect of a pelvic-support chair on the lumbar lordosis and sacral tilt in patients with LBP.
We recruited 29 patients with non-specific LBP and 11 healthy subjects in South Korea from Apr 2017 to Mar 2018. The sagittal lumbosacral alignment was examined radiographically in three sitting postures: usual, erect, and sitting in a pelvic-support chair. Five angles [the lumbar lordosis, upper lumbar (ULA), lower lumbar (LLA), lumbosacral (LSA), and sacral slope (SS) angles] were compared between the subjects with LBP and healthy subjects in the three sitting conditions.
There were significant differences in the lumbar lordosis, ULA, LLA, LSA, and SS according to sitting condition (<.05). All five angles were significantly greater when participants sat erect or in a pelvic-support chair than in their usual sitting position (<.05). ULA and SS were significantly greater when sitting erect than in a pelvic-support chair (<.05). LLA was significantly greater in controls than in patients with LBP =.042).
The sagittal alignment of the lumbosacral region differed significantly among usual, erect, and pelvic-support chair sitting in patients with LBP and controls. Decreased lordotic curve of the lumbar spine in the usual sitting position can be changed in both patients with LBP and healthy subjects by sitting with pelvic support chair.
坐姿时腰椎前凸不足是下腰痛（LBP）的危险因素。人们使用了各种椅子来在坐姿时维持腰椎矢状前凸和骶骨对线。我们旨在证明骨盆支撑椅对LBP患者腰椎前凸和骶骨倾斜的影响。
2017年4月至2018年3月，我们在韩国招募了29例非特异性LBP患者和11名健康受试者。通过影像学检查三种坐姿下的腰骶矢状位对线情况：平常坐姿、直立坐姿和坐在骨盆支撑椅上的坐姿。比较了LBP患者和健康受试者在三种坐姿下的五个角度[腰椎前凸角、上腰椎角（ULA）、下腰椎角（LLA）、腰骶角（LSA）和骶骨倾斜角（SS）]。
根据坐姿不同，腰椎前凸角、ULA、LLA、LSA和SS存在显著差异（<.05）。当参与者直立或坐在骨盆支撑椅上时，所有五个角度均显著大于平常坐姿时（<.05）。直立坐姿时的ULA和SS显著大于坐在骨盆支撑椅上时（<.05）。LLA在对照组中显著大于LBP患者（ =.042）。
LBP患者和对照组在平常坐姿、直立坐姿和坐在骨盆支撑椅上时，腰骶部区域的矢状位对线存在显著差异。通过坐在骨盆支撑椅上，LBP患者和健康受试者平常坐姿时减小的腰椎前凸曲线均可得到改变。
