Curtin University of Technology, Perth, Western Australia, Australia.
Spine (Phila Pa 1976). 2010 Jun 15;35(14):1387-95. doi: 10.1097/BRS.0b013e3181bd3ea6.
A preliminary cross-sectional comparative study of adolescents with nonspecific chronic low back pain (NSCLBP) and healthy controls.
To investigate whether differences in spinal kinematic and trunk muscle activity exist in both usual and slump sitting in adolescents with NSCLBP.
Evidence suggests that low back pain commonly develops in adolescence and increases the risk for low back pain in adulthood. Sitting is an important consideration in adolescents with NSCLBP: currently there are no reports investigating their motor control strategies in sitting.
Twenty-eight adolescents (14 female) with NSCLBP and 28 matched pain-free controls were recruited from a large cohort study. Pain subjects were subclassified based on O'Sullivan's classification system. Three-dimensional lumbo-pelvic kinematic data and the activation of 3 back and 2 abdominal muscles were recorded during usual and slump sitting. The flexion-relaxation phenomenon in sitting was also investigated.
Spinal posture in usual and slump sitting were similar for adolescents with and without NSCLBP. However, differences were identified in both sitting conditions when those with NSCLPB were subclassified and compared with controls. Muscle activation differences were not consistently identified, with only lower levels of internal oblique activation in usual sitting in NSCLBP compared with pain-free controls showing significance. Flexion relaxation was observed in both iliocostalis and thoracic erector spinae in the NSCLBP group but not controls.
This study provides preliminary results. Differences with sitting posture are only seen when adolescents with NSCLBP are classified. Trunk muscle activation is not a sensitive marker for discriminating subgroups of NSCLBP during adolescence.
青少年非特异性慢性下背痛（NSCLBP）与健康对照组的初步横断面比较研究。
研究青少年非特异性慢性下背痛（NSCLBP）患者在通常坐姿和懒散坐姿下脊柱运动学和躯干肌肉活动是否存在差异。
有证据表明，腰痛在青少年中很常见，会增加成年后患腰痛的风险。坐姿是青少年非特异性慢性下背痛（NSCLBP）的一个重要考虑因素：目前尚无研究报告调查他们在坐姿下的运动控制策略。
从一项大型队列研究中招募了 28 名青少年（14 名女性）非特异性慢性下背痛（NSCLBP）患者和 28 名匹配的无痛对照组。疼痛组根据 O'Sullivan 分类系统进行亚组分类。在通常坐姿和懒散坐姿下记录三维腰骨盆运动学数据和 3 块背部肌肉和 2 块腹部肌肉的激活情况。还研究了坐姿中的屈伸松弛现象。
在通常坐姿和懒散坐姿下，有无 NSCLBP 的青少年的脊柱姿势相似。然而，当将 NSCLBP 患者亚组分类并与对照组进行比较时，在两种坐姿条件下都发现了差异。肌肉激活差异并不一致，仅在 NSCLBP 患者的通常坐姿中内斜肌激活水平较低，与无痛对照组相比具有显著性。在 NSCLBP 组中观察到竖脊肌和胸髂肋肌在屈伸松弛现象，但在对照组中没有。
本研究提供了初步结果。只有当 NSCLBP 青少年被分类时，才会看到与坐姿姿势的差异。在青少年时期，躯干肌肉激活不是区分 NSCLBP 亚组的敏感标志物。
