Burnett Angus F, Cornelius Mary W, Dankaerts Wim, O'sullivan Peter B
School of Biomedical and Sports Science, Edith Cowan University, 100 Joondalup Drive, Joondalup, 6027 Western Australia, Australia.
Man Ther. 2004 Nov;9(4):211-9. doi: 10.1016/j.math.2004.06.002.
The aim of this pilot study was to examine whether differences existed in spinal kinematics and trunk muscle activity in cyclists with and without non-specific chronic low back pain (NSCLBP). Cyclists are known to be vulnerable to low back pain (LBP) however, the aetiology of this problem has not been adequately researched. Causative factors are thought to be prolonged forward flexion, flexion-relaxation or overactivation of the erector spinae, mechanical creep and generation of high mechanical loads while being in a flexed and rotated position. Nine asymptomatic cyclists and nine cyclists with NSCLBP with a flexion pattern disorder primarily related to cycling were tested. Spinal kinematics were measured by an electromagnetic tracking system and EMG was recorded bilaterally from selected trunk muscles. Data were collected every five minutes until back pain occurred or general discomfort prevented further cycling. Cyclists in the pain group showed a trend towards increased lower lumbar flexion and rotation with an associated loss of co-contraction of the lower lumbar multifidus. This muscle is known to be a key stabiliser of the lumbar spine. The findings suggest altered motor control and kinematics of the lower lumbar spine are associated with the development of LBP in cyclists.
这项初步研究的目的是检验有无非特异性慢性下腰痛（NSCLBP）的骑行者在脊柱运动学和躯干肌肉活动方面是否存在差异。众所周知，骑行者易患下腰痛（LBP），然而，这一问题的病因尚未得到充分研究。其致病因素被认为包括长时间向前屈曲、竖脊肌的屈曲-放松或过度激活、机械蠕变以及在屈曲和旋转姿势下产生的高机械负荷。对9名无症状骑行者和9名主要与骑行相关的有屈曲模式障碍的NSCLBP骑行者进行了测试。通过电磁跟踪系统测量脊柱运动学，并从选定的躯干肌肉双侧记录肌电图。每五分钟收集一次数据，直到出现背痛或全身不适妨碍进一步骑行。疼痛组的骑行者表现出下腰椎屈曲和旋转增加的趋势，同时下腰椎多裂肌的共同收缩减少。已知该肌肉是腰椎的关键稳定器。研究结果表明，下腰椎的运动控制和运动学改变与骑行者LBP的发生有关。
