This study assessed the relationship of each movement direction on the lumbar spine and on the pelvis in regards to lumbar-pelvic coordination in the sitting position. Lumbar and pelvic motions were recorded using a flexible electrogoniometer in 12 healthy subjects during two different tasks in the sitting position. The coordination of the lumbar spine and pelvis was evaluated using the ratio of lumbar and pelvic angles (L/P ratio hereafter) in three motion phases. There were significant differences in the L/P ratio values between during the "forward bending" and "rising from a forward flexed position" phases (P<0.01). The L/P ratio value ( approximately -0.7) was consistent during the movement from an erect to a slumped sitting position as the lumbar spine and pelvis moved in opposing directions. This study shows that lumbar-pelvic coordination occurs in the sitting position. Lumbar-pelvic coordination is confirmed even if the movement tasks are different in the sitting position, and these findings show that aspects of a particular movement are dependent on the given movement task. These findings may provide greater insight into the kinematic changes involved in lumber-pelvic coordination, and help clinicians implement sitting exercises conducive to the independence of the patient.
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机译：这项研究评估了就坐姿的腰-骨盆协调性而言，腰椎和骨盆上每个运动方向的关系。在坐姿中完成两项不同的任务期间，在12位健康受试者中，使用挠性电动测角仪记录了其腰部和骨盆运动。使用三个运动阶段的腰椎和骨盆角度之比（以下称L / P比）评估腰椎和骨盆的协调性。 L / P比值在“向前弯曲”阶段和“从向前弯曲位置上升”阶段之间存在显着差异（P <0.01）。 L / P比率值（约-0.7）在从直立到俯卧的坐姿运动期间是一致的，因为腰椎和骨盆沿相反的方向运动。这项研究表明，坐姿会发生腰盆骨协调。即使坐姿中的运动任务不同，腰椎骨盆协调性也得到了确认，这些发现表明，特定运动的各个方面取决于给定的运动任务。这些发现可以提供有关腰椎-骨盆协调运动变化的更多见解，并帮助临床医生进行有益于患者独立性的坐姿锻炼。
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