Low back pain: rational component

该项目的全球目标有两个。首先，开发一个数据库和知识，作为控制因旋转引起的腰背损伤的标准的基础。其次，通过所获得的结果，为治疗下腰痛患者制定科学基础和制定治疗方案。提示在复杂的弯-扭运动中，随着不对称性的增加，脊柱肌肉的负荷显著增加。随着扭转的增加，脊柱肌肉的疲劳开始出现的时间也越来越不同。随着扭转的增加，不同躯干肌肉的疲劳进展速度也不同。不同躯干肌肉的疲劳开始时间和疲劳率的差异导致肌肉和机械失衡为损伤奠定了基础。本研究的具体目标：1.对屈伸和躯干旋转的联合运动有一个定性和定量的了解。以15、30和60度/秒的速度在不同旋转度(扭转度20、40和60度)的标准化静态和动态活动中，估算躯干旋转-屈伸-伸展过程中躯干肌肉之间的负荷分配。确定躯干不同程度旋转(20度、40度和60度扭转)时，躯干肌肉疲劳的相对开始时间和进展速度，从而导致肌肉失衡和损伤的危险。

The global objectives of the project are two-fold.  One, to develop a database and knowledge on which criteria for controlling low-back injuries due to rotation can be based.  Secondly, through the results obtained, to develop a scientific basis and for formulation of treatment regimes for treatment of low-back pain patients. It is suggested that increasing asymmetry in complex bending-twisting motion increases the load on spinal muscles differentially and significantly.  With increasing twisting, the onset of fatigue in spinal muscles occurs at times increasingly different from each other.  With increasing twisting, the rate of progression of fatigue in different trunk muscles is also different.  The difference in fatigue onset time and rate of fatigue in different trunk muscles results in muscle and mechanical imbalance setting the stage for injury. The specific objectives of the study: i. to develop a qualitative and quantative understanding of combined motion of flexion/extension and trunk rotation ii. to estimate a load sharing among trunk muscles during trunk rotation-flexion-extension in standardized static and dynamic activities at the the velocities of 15, 30 and 60 degress per second at various degress of rotation (20, 40 and 60 degress of twisting) iii. to determine the relative onset timing and rate of progression of fatigue amoung torso muscles leading to muscle imbalance and consequent hazard for injury of various degrees of trunk rotation (20, 40 and 60 degrees of twisting).