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Article type: Research Article
Authors: Yan, Zhi-Weia; 1 | Yang, Zhenb; 1 | Zhao, Feng-Longc | Gao, Yana | Wu, Zhen-Kuna | Wang, Jie-Longd | Zhou, Meie; *
Affiliations: [a] Department of Sports Rehabilitation, College of Human Kinesiology, Shenyang Sport University, Liaoning, China | [b] Moray House School of Education and Sport, University of Edinburgh, Edinburgh, UK | [c] Institute of Ultrasonic Engineering in Medicine, Chongqing Key Laboratory of Ultrasound Medical Engineering, Department of Biomedical Engineering, Chongqing Medical University, Chongqing, China | [d] School of Physical Education and Sports Science, Soochow University, Suzhou, China | [e] Laboratory Management Center, Shenyang Sport University, Liaoning, China
Correspondence: [*] Corresponding author: Mei Zhou, Laboratory Management Center, Shenyang Sport University, 36 Jinqiansong East Road Sujiatun District, Shenyang, Liaoning, China, E-mail: [email protected].
Note: [1] Zhi-Wei Yan and Zhen Yang contributed equally to this work.
Abstract: BACKGROUND: The persistence of symptoms in patients with chronic neck pain is considered to be associated with variation in the neck muscle structure and associated neuromuscular control. Sling exercise therapy (SET) has been demonstrated to relieve the symptoms of chronic neck pain, whereas it is controversial whether this benefit is correlated to altered neck muscle structure and associated neuromuscular control in the patients. OBJECTIVE: To investigate the effect of SET on cervical muscle structure (thickness) and associated neuromuscular control in patients with chronic neck pain. METHODS: Twenty-five patients with chronic neck pain were randomly assigned to the SET group (n= 12) or the control group (n= 13). The SET group received the SET intervention for 4 weeks, while the control group maintained normal activities of daily living. At baseline and after 4 weeks of intervention, Visual analogue scale and neck disability index were measured in both groups, and changes in the thickness of the superficial cervical muscles were assessed using musculoskeletal ultrasound. Surface electromyography (EMG) was adapted to assess the neuromuscular control of the neck while the participant was performing the cranio-cervical flexion test. RESULTS: At 4 weeks, the SET group had a significant reduction of RMS in both UT and SCM of EMG compared to the control group (p< 0.05). Regarding ultrasound, the SET group had significantly lower muscle thickness compared to the control group in both the rest position and the MVIC position (p< 0.05). There were no within-group differences in the control group (p> 0.05), while the SET group showed significant reductions in both RMS and muscle thickness (p< 0.05). CONCLUSION: 4-week SET was effective in reducing pain and dysfunction in patients with chronic neck pain, which may be related to improved neck muscle thickness and neuromuscular control of the neck.
Keywords: Exercise prescription, musculoskeletal disorders, pain, ultrasonography
DOI: 10.3233/BMR-220030
Journal: Journal of Back and Musculoskeletal Rehabilitation, vol. 36, no. 2, pp. 387-397, 2023
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