Effectiveness of Manual and Instrumental Myofascial Release in Chronic Low Back Pain and the Posture of Practitioners CrossFit®

The sequence of myofascial release is as follows: 30 seconds of contact between the therapist's hands and the entire region of the participant's spine, sliding with medium pressure in a caudocranial direction; palpation of the erector spinae, quadratus lumborum, gluteus and piriformis muscles bilaterally, to identify trigger points, marking each point of tension with a dermographic pencil for subsequent manipulation; 3 cycles of bilateral paravertebral release, by sustained pressure with crossed hands, until the restrictive tissue barrier is found, for 60 seconds; 90 seconds of the vertical rolling technique (superficial elevation of the skin and mobilisation of the tissue with the tips of all the fingers) on the bilateral paravertebrals and, at the end, sliding along the entire length of the bilateral multifidus, with the fingers flexed, using the bony prominence between the proximal and middle phalanges as contact with the skin, in a caudocranial direction and returning craniocaudal.

The acrylic cups (DongBang®) will be placed on the meridional points, as Traditional Chinese Medicine calls them, 1 cup in the central region of each popliteal fossa, the so-called B40 or Wei Zhong point, 6 cups in the region of the quadratus lumborum muscles, more specifically on the BL23 or Shenshu points (approximately 5 centimetres lateral to the edge of the L2 spinous process), BL24 or Qihaishu (approximately 5 centimetres lateral to the edge of the spinous process of L3) and BL25 or Dachangshu (approximately 5 centimetres lateral to the edge of the spinous process of L4) bilaterally, as well as a cup on a single point of the participant's choice, where they report the most lower back pain (ashi point). The cups will be attached to the skin using a gun, applying two suction pressures, and the participant will be asked to signal whether the pressure is strong or weak. The cups will remain attached for 12 minutes on the B40 meridian and 15 minutes on the other meridians. If a cup lo