In “Preventative Strategies for Lower Back Strains Part I,” we discussed femoral-pelvic and lumbar-pelvic rhythm, muscles that influence these rhythms, and the effects of these muscles on the lumbar spine. Here, our discussion progresses as we cover the trunk, the thoraco-lumbar fascia (TLF), Uddiyana Bandha and how accurate knowledge of this can be used to enhance the benefits of yoga and decrease the risk of lower back strains.
The thoraco-lumbar complex (TLC) is a multilayered structure comprised of the thoracolumbar fascia and the muscles that connect to it. This composition of passive fascial tissues and active muscular structures acts as a corset-like structure that encircles the torso. It plays a key role in maintaining the integrity and stability of the lumbar spine and the sacroiliac joint and is also important for load transfer from the upper limbs to the lower limbs. Engaging the muscles that connect to the thoracolumbar fascia acts to stabilize the spine and trunk. We give an example of this in a previous blog post on using the latissimus dorsi to lift the lumbar and expand the thorax. Figure 1 illustrates the thoraco-lumbar composite in cross section at the mid-lumbar.
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