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RESEARCH PRODUCT

Effects of unstable shoes on trunk muscle activity in patients with chronic low back pain

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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/S0966636218307252?via%3Dihub En este artículo científico también participan los siguientes autores: María Dolores Arguisuelas, Julio Doménech-Fernández, Daniel Sánchez-Zuriaga, Juan José Amer-Cuenca, Javier Martínez-Gramage, Francisco Javier Montañez-Aguilera y Juan Francisco Lisón. Este es el pre-print del siguiente artículo: Salvador Coloma, P., Arguisuelas, MD., Doménech-Fernández, J., Sánchez-Zuriaga, D., Amer-Cuenca, JJ., Martínez-Gramage, J. et al. (2018). Effects of unstable shoes on trunk muscle activity in patients with chronic low back pain. Gait and Posture, vol. 64 (jul.) pp. 165-168, que se ha publicado de forma definitiva en https://doi.org/10.1016/j.gaitpost.2018.06.025 This is the pre-peer reviewed version of the following article: Salvador Coloma, P., Arguisuelas, MD., Doménech-Fernández, J., Sánchez-Zuriaga, D., Amer-Cuenca, JJ., Martínez-Gramage, J. et al. (2018). Effects of unstable shoes on trunk muscle activity in patients with chronic low back pain. Gait and Posture, vol. 64 (jul.) pp. 165-168, which has been published in final form at https://doi.org/10.1016/j.gaitpost.2018.06.025 Unstable shoe was developed as a walking device to strengthen the lower extremity muscles and reduce joint loading. A large number of studies have reported in asymptomatic adults increased electromyography (EMG) activity throughout the gait cycle in most of the lower limb muscles. However, no previous studies have explored the effects of wearing unstable shoes on trunk muscle activity in patients with chronic low back pain (CLBP). Therefore, the aim of the present study was to compare trunk muscle activity during gait using an unstable shoe and a conventional flat control shoe in patients with CLBP. Thirty-five CLBP patients (51.1±12.4 yrs.; 26±3.8 kg/m2; 9.3±5.2 Roland Morris Disability Questionnaire score) were recruited from the Orthopedic Surgery Service at the Hospital to participate in this cross-sectional study. All participants underwent gait analysis by simultaneously collecting surface electromyography (EMG) data from erector spinae (ES), rectus abdominis (RA), obliquus internus (OI) and obliquus externus (OE) muscles, while walking on a treadmill with flat control shoes and experimental unstable shoes. The results showed significantly higher %EMG activity in ES (mean difference: 1.8%; 95% confidence interval [CI] 1.3 to 2.2), RA (mean difference: 1.5%; 95% CI 0.3 to 2.7), and OI (mean difference: 1.5%; 95% CI 0.2 to 2.8) in the unstable shoes condition compared to the flat shoes condition. Based on these findings, the use of unstable shoes may have potential implications in promoting spine stability, particularly in improving neuromuscular control of trunk muscles in CLBP treatment. Preprint