6533b7dafe1ef96bd126e32b

RESEARCH PRODUCT

Effects of myofascial release in erector spinae myoelectric activity and lumbar spine kinematics in non-specific chronic low back pain: Randomized controlled trial

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Este artículo se encuentra disponible en la página web de la revista en la siguiente URL: https://www.sciencedirect.com/science/article/abs/pii/S0268003318300330?via%3Dihub This is the pre-peer reviewed version of the following article: Arguisuelas, M.D., Lisón, J.F., Doménech-Fernández, J., Martínez-Hurtado, I., Salvador Coloma, P. & Sánchez-Zuriaga, D. (2019). Effects of myofascial release in erector spinae myoelectric activity and lumbar spine kinematics in non-specific chronic low back pain: randomized controlled trial. Clinical Biomechanics, vol. 63, pp. 27-33, which has been published in final form at https://doi.org/10.1016/j.clinbiomech.2019.02.009 Este es el pre-print del siguiente artículo: Arguisuelas, M.D., Lisón, J.F., Doménech-Fernández, J., Martínez-Hurtado, I., Salvador Coloma, P. & Sánchez-Zuriaga, D. (2019). Effects of myofascial release in erector spinae myoelectric activity and lumbar spine kinematics in non-specific chronic low back pain: randomized controlled trial. Clinical Biomechanics, vol. 63, pp. 27-33, que se ha publicado de forma definitiva en https://doi.org/10.1016/j.clinbiomech.2019.02.009 Background: Flexion-relaxation response of the lumbar erector spinae has been previously studied after different interventions such as exercise programs or spinal manipulation, in subjects with chronic low back pain. The objective of the study was to investigate the effects of an isolate myofascial release protocol on erector spinae myoelectric activity and lumbar spine kinematics in chronic low back pain. Methods: Thirty-six participants, with nonspecific chronic low back pain, were randomized to myofascial release group (n=18) receiving four sessions of myofascial treatment, each lasting 40 minutes, and to control group (n=18) receiving a sham myofascial release. Electromyographic and kinematic variables as well as pain and disability questionnaires were analyzed. Findings: There was a bilateral reduction of the flexion relaxation ratio in individuals receiving myofascial release and who did not show myoelectric silence at baseline (right difference M = .34, 95% CI [0.16, 0.33], p ≤ .05 and left difference M = .45, 95% CI [0.16, 0.73], p ≤ .05). There was also a significant reduction in pain in the myofascial release group (difference M = −9.1, 95% CI [−16.3, −1.8], p ≤ .05) and disability (difference M = −5.6, 95% CI [−9.1, −2.1], p ≤ .05), compared with control group. No significant differences between groups were found for the kinematic variables. Interpretation: The myofascial release protocol contributed to the normalization of the flexion- relaxation response in individuals who did not show myoelectric silence before the intervention, and also showed a significant reduction in pain and disability compared with the sham group. Preprint