McGill S M, Norman R W
Department of Kinesiology, University of Waterloo, Ontario, Canada.
J Biomed Eng. 1988 Jul;10(4):312-8. doi: 10.1016/0141-5425(88)90060-x.
The lumbodorsal fascia (LDF) has been implicated in numerous biomechanical interpretations of low back mechanics as a tissue that provides support to the lumbar spine during demanding load bearing. One hypothesis is that oblique abdominal muscle forces contribute to trunk extensor moment by transforming lateral abdominal tension into longitudinal tension via the LDF. However, a review of the anatomical literature supports the hypothesis that extensor forces in the LDF result from tension within the latissimus dorsi muscle. The purpose of our work was to evaluate the potential of the LDF to generate trunk extensor moment using two mathematical models: one that activated the LDF with the abdominals and another that activated the LDF with the latissimus dorsi. Efforts were made to represent the anatomy as accurately as possible. The results from three subjects performing six squat lifts each, suggested that the potential of the LDF to contribute significant extensor moment has been overestimated. In fact, the issue of whether the LDF is activated by the abdominals or the latissimus dorsi is irrelevant because neither strategy appeared able to generate sizable extensor moments in the type of lift studied.
腰背筋膜（LDF）在对下背部力学的众多生物力学解释中被认为是一种在承受较大负荷时为腰椎提供支撑的组织。一种假设是，腹斜肌的力量通过腰背筋膜将腹部侧向张力转化为纵向张力，从而有助于产生躯干伸肌力矩。然而，对解剖学文献的回顾支持了这样一种假设，即腰背筋膜中的伸肌力量来自背阔肌内部的张力。我们研究的目的是使用两种数学模型评估腰背筋膜产生躯干伸肌力矩的潜力：一种是通过激活腹部肌肉来激活腰背筋膜，另一种是通过激活背阔肌来激活腰背筋膜。我们尽可能精确地呈现解剖结构。三名受试者每人进行六次深蹲举的结果表明，腰背筋膜产生显著伸肌力矩的潜力被高估了。事实上，腰背筋膜是由腹部肌肉还是背阔肌激活的问题并不重要，因为在研究的这种举重类型中，两种策略似乎都无法产生可观的伸肌力矩。
