Xi Xin, Zhang Ling, Yu Haixin, Qin Yifei, Jia Long, Tsai Tsung-Yuan, Yu Yan, Cheng Liming
Department of Spine Surgery, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200092, China.
Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration, Ministry of Education, Department of Spine Surgery, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200092, China.
Bioengineering (Basel). 2025 Feb 20;12(3):214. doi: 10.3390/bioengineering12030214.
The lumbopelvic region plays a pivotal role in enabling various functional activities. This study quantified and compared the kinematic changes between healthy individuals and patients with recurrent low back pain (LBP) in both rested and fatigued states to gain insight into the kinematic adaptation and mechanisms underlying kinematic variations that occur in the presence of these factors.
Participants were divided into two groups: the LBP ( = 23) and healthy control groups ( = 19). Dynamic lumbopelvic measurements were taken using a biplane radiography image system while the participants performed weight-bearing forward-backward bending before and after fatigue. All lumbopelvic kinematics were described as the three-dimensional motion of the vertebra relative to the pelvis and were measured at normalized time intervals from maximum extension to approximately 45° of flexion.
Repetitive lifting- and lowering-induced fatigue significantly affected lumbopelvic kinematics in the anterior/posterior translation (mm) and rotation around the z-axis in both healthy individuals and patients with LBP ( < 0.05). In healthy individuals, significant differences occurred in approximately 13-83% of the forward-backward bending cycle (0-100%), whereas, in patients with LBP, significant differences mainly occurred in 61-93% of the cycle ( < 0.01).
The lumbopelvic kinematic changes observed in both LBP patients and healthy individuals after fatigue may indicate protective compensation or vulnerability and could play a role in LBP dysfunction.
腰骶部区域在实现各种功能活动中起着关键作用。本研究对健康个体和复发性腰痛（LBP）患者在休息和疲劳状态下的运动学变化进行了量化和比较，以深入了解在这些因素存在时发生的运动学适应情况以及运动学变化的潜在机制。
参与者分为两组：LBP组（n = 23）和健康对照组（n = 19）。在参与者疲劳前后进行负重前屈-后伸时，使用双平面X射线摄影图像系统进行动态腰骶部测量。所有腰骶部运动学均描述为椎体相对于骨盆的三维运动，并在从最大伸展到大约45°屈曲的标准化时间间隔内进行测量。
重复的提起和放下引起的疲劳显著影响了健康个体和LBP患者在前后平移（mm）和绕z轴旋转方面的腰骶部运动学（P < 0.05）。在健康个体中，显著差异出现在前后屈伸周期的约13 - 83%（0 - 100%），而在LBP患者中，显著差异主要出现在周期的61 - 93%（P < 0.01）。
LBP患者和健康个体在疲劳后观察到的腰骶部运动学变化可能表明保护性补偿或易损性，并可能在LBP功能障碍中起作用。
