My very first yoga class was with an Iyenga teacher in Pitt St, Sydney back in 1986 and she said to me “the answer Zoe is in the breath”….
Given the smooth muscle properties and the control that the autonomic nervous system may have over the fascial network, perhaps a potential window into effectively dealing with increased myofascial tone can circle around to breathing.
Respiratory function is on aspect of the autonomic nervous system that we actually have direct control over. We can change our breathing and help to elicit a parasympathetic response to allow for greater relaxation and potentially less overall tissue tone/tension, hopefully leading to more of a comfortable state of being a decreased threat perception. Additionally, the role of the diaphragm in stabilizing the lumbar region cannot be overlooked and the fact that it shares a fascial connection with the quadratus lumborum (as well as the psoas major) and the transverse abdominus fibers invest themselves into part of the diaphragm means that the diaphragm is in a potentially prime position to have an influence over the thoracolumbar fascia, since both of these muscles invest into layers of that fascial structure.