Spino-pelvic-rhythm with forward trunk bending in normal subjects without low back pain.
Spino-pelvic-rhythm with forward trunk bending in normal subjects without low back pain.
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无腰痛的正常受试者中躯干向前弯曲的脊柱骨盆节律。
DOI：
10.1007/s00590-013-1303-1
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发表时间：
2013
影响因子：
1.7
通讯作者：
Nakamura Y.
中科院分区：
文献类型：
--
作者：
Hasebe K;Sairyo K;HadaY;Dezawa A;Okubo Y;Kaneoka K;Nakamura Y.
下背痛和紧腿筋之间有很强的相关性。然而，紧张的腘绳肌对脊柱生物力学的影响仍不清楚。该研究的目的是研究躯干向前弯曲期间的脊髓骨盆节律，并阐明与腿筋紧张相关的节律特征。18名没有腰痛史的健康男性成年人自愿参加。首先，我们在直立位置测量手指到地板的距离（FFD），并将此参数设置为100%。使用脊柱小鼠，在以下四个位置测量脊柱对准：（1）直立姿势-100%FFD;（2）向前弯曲-50%FFD;（3）向前弯曲-25%FFD;和（4）向前弯曲-0%FFD（手指与地板接触）。计算胸腰椎和骨盆角度的变化。作为一个指标紧张的腿筋，我们测量直腿抬高（SLR）的角度。从位置1-2（阶段I），整个脊柱骨盆角移动104°。在这个阶段，腰椎主要活动。在第二阶段（位置2-3），它移动了16°。有趣的是，除2名受试者外，所有受试者的胸椎运动均显示为负角度，这意味着在躯干屈曲期间胸椎伸展4°，因此表现出反常运动。在此阶段，腰骨盆节律表现出2种模式。在7名受试者中，骨盆运动大于腰椎运动，而其余受试者则相反。在没有紧腿筋的受试者中，83%表现出骨盆优势模式。只有7名受试者能够完成4号姿势。在此阶段，仅在脊柱中观察到轻微运动，并且大部分运动发生在骨盆中。腰椎和骨盆运动在所有阶段呈负相关。SLR角度和骨盆运动密切相关，在第三阶段，灵活的主体占主导地位的骨盆运动。腰盆节律包括腰优势型和盆优势型两种类型。在灵活的科目，骨盆运动占主导地位。总之，改善紧张的腿筋可以减少腰椎负荷，从而减少腰痛。
A strong correlation between low back pain and tight hamstrings has been reported. However, the effect of tight hamstrings on spinal biomechanics remains unclear. The purpose of the study was to investigate spino-pelvic-rhythm during forward bending of the trunk and to clarify the rhythm features with regard to hamstrings tightness. Eighteen healthy male adults with no history of low back pain volunteered to participate. First, we measured the finger-to-floor distance (FFD) in the upright position and set this parameter to 100 %. Using a spinal mouse, spinal alignment was measured in the following four positions: (1) upright posture—100 % FFD; (2) forward bending—50 % FFD; (3) forward bending—25 % FFD; and (4) forward bending—0 % FFD (fingers in contact with the floor). Changes of the angle of the thoracic and lumbar spine as well as the pelvis were calculated. As an indicator of tight hamstrings, we measured straight leg raising (SLR) angle. From positions 1–2 (phase I), the entire spino-pelvic angle moved in 104°. During this phase, the lumbar spine mainly moved. In the second phase (positions 2–3), it moved in 16°. Interestingly, all but 2 subjects showed a negative angle in the thoracic motion, meaning that the thoracic spine extended 4° during trunk flexion, thus exhibiting paradoxical motion. During this phase, lumbopelvic rhythm showed 2 patterns. In 7 subjects, pelvic motion was greater than lumbar motion, while the remaining subjects showed the opposite. In subjects without tight hamstrings, 83 % showed a pelvis-dominant pattern. Only 7 subjects were capable of position 4. During this phase, only slight motion was noted in the spine, and the majority of the motion occurred in the pelvis. Lumbar and pelvic motion correlated negatively in all phases. SLR angle and pelvic motion correlated strongly during phase III, indicating dominant pelvic movement in flexible subjects. The lumbo-pelvic-rhythm comprises 2 patterns—lumbar dominant and pelvis dominant. In flexible subjects, pelvis movement was dominant. In conclusion, improving tight hamstrings may reduce lumbar loading thereby reducing low back pain.