Low back pain: rational component

该项目的全球目标是双重的。第一，建立一个数据库和知识，以控制由于旋转引起的腰背部损伤的标准为基础。其次，通过所获得的结果，为治疗腰痛患者制定科学的治疗方案和依据。结果表明，在复杂的弯曲-扭转运动中，不对称性的增加会显著增加脊柱肌肉的负荷。随着扭转的增加，脊柱肌肉疲劳发作的时间越来越不同。随着捻度的增加，躯干不同肌肉的疲劳进展速度也不同。不同躯干肌肉的疲劳发生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。该研究的具体目标是：1 .对屈/伸和躯干旋转的联合运动进行定性和定量的理解。在标准化的静态和动态活动中，躯干旋转-弯曲-伸展以15、30和60度/秒的速度在不同程度的旋转（20、40和60度的扭转）时，躯干肌肉之间的负荷分担。确定躯干肌肉疲劳的相对发病时间和进展速度，导致不同程度躯干旋转（20、40和60度扭转）时肌肉失衡和随之而来的损伤危险。

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).