Several researchers investigated the anatomy and biomechanics of the sacroiliac joint (SIJ) to understand the relationship between lower back pain and the SIJ. Many studies concluded that the SIJ has little movement; however, some studies using spinopelvic parameters mentioned high change in pelvic incidence (PI). In this study, SIJ movement and PI change reported in previous studies were reviewed according to position and posture changes. Literature on SIJ movement was reviewed by searching through the publication databases. In biomechanical studies, the result of the rotational angle in the sagittal plane was mainly investigated to compare with the results of PI change. From the results of SIJ movement studies, the minimum movement of nutation and count-nutation was 0.01°, and maximum movement was 2.27°. From the results of PI change studies with different positions and movements, the highest change was 9°, and the lowest change was 0°. Movement of the SIJ was limited by its anatomical structure; maximum movement of the SIJ was 9° in a previous study. Therefore, SIJ movement should be studied more intensely as biomechanical perspective to understand its movement.

几位研究人员调查了骶髂关节 (SIJ) 的解剖学和生物力学，以了解下背痛与 SIJ 之间的关系。许多研究得出结论，SIJ 几乎没有运动。然而，一些使用脊柱骨盆参数的研究提到骨盆发病率（PI）的变化很大。在本研究中，根据体位和姿势的变化，回顾了以往研究报告的 SIJ 运动和 PI 变化。通过搜索出版物数据库，审查了有关 SIJ 运动的文献。在生物力学研究中，主要研究了矢状面旋转角度的结果，以与PI变化的结果进行比较。从SIJ动作研究的结果来看，章动和计数章动的最小移动为0.01°，最大移动为2.27°。从不同位置和运动的PI变化研究结果来看，变化最大为9°，变化最小为0°。SIJ 的运动受限于其解剖结构；在之前的研究中，SIJ 的最大运动为 9°。因此，应将 SIJ 运动作为生物力学的角度进行更深入的研究，以了解其运动。