Liang Hongying, Yu Suiqing, Hao Man, Deng Weixin, Lin Ming, Zhang Zheng, Liu Chunlong
Clinical Medical College of Acupuncture, Moxibustion, and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou City, Guangdong Province, China.
Med Biol Eng Comput. 2022 Oct;60(10):3009-3017. doi: 10.1007/s11517-022-02655-4. Epub 2022 Aug 30.
The purposes of this study were to (1) examine the effects of different cervicothoracic postures on the stiffness of trapezius muscles and (2) compare the stiffness of the dominant and non-dominant trapezius muscles. Twenty-one healthy participants joined in this project. After maintaining different cervicothoracic postures for 2 min, MyotonPRO was used to measure the stiffness of the trapezius. The results showed that (1) the stiffness of trapezius muscles was significantly affected by different cervicothoracic postures. With the increase of neck flexion angle, the stiffness of the trapezius muscles increased (p < 0.05). The muscle stiffness of upper back relaxed was higher than that of upper back upright (p < 0.05). (2) The trapezius muscles on the non-dominant side were stiffer than that on the dominant side (p < 0.05). Poor cervicothoracic postures will increase the stiffness of upper, middle and lower trapezius muscles. Keeping the neck and upper back upright will keep the muscle stiffness at a low level, so as to reduce the occurrence of neck and shoulder fatigue and pain.
（1）研究不同颈胸姿势对斜方肌僵硬度的影响；（2）比较优势侧和非优势侧斜方肌的僵硬度。21名健康参与者参与了本项目。在保持不同颈胸姿势2分钟后，使用MyotonPRO测量斜方肌的僵硬度。结果表明：（1）不同颈胸姿势对斜方肌僵硬度有显著影响。随着颈部前屈角度的增加，斜方肌僵硬度增加（p<0.05）。上背部放松时的肌肉僵硬度高于上背部挺直时（p<0.05）。（2）非优势侧斜方肌比优势侧更僵硬（p<0.05）。不良的颈胸姿势会增加上、中、下斜方肌的僵硬度。保持颈部和上背部挺直可使肌肉僵硬度维持在较低水平，从而减少颈肩疲劳和疼痛的发生。
