Surface electromyography analysis of ankle flexor and extensor activity under different standing stability levels.

IF 1.6 4区 医学 Journal of Orthopaedic Surgery Pub Date : 2024-05-01 DOI:10.1177/10225536241258336
Fangchao Wu, Jiahe Zhang, Kezhen Yang, Yangzhen Li, Zetong Li, Tian Li, Jianhua Li
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Abstract

Background: To observe the activation strategies of the ankle muscles using surface electromyography (sEMG) during single-leg standing (SLS) and both-leg standing (BLS) on flat ground (FG), soft mat (SM), and BOSU ball (BB) surfaces. Methods: Thirty healthy young adults participated in the study. The muscle activities of the tibialis anterior (TA) and gastrocnemius medial (GM) were measured on the three surfaces during SLS and BLS. Electromyographic evaluations of the TA and GM were recorded during maximum voluntary isometric contractions (MVIC). Muscle activation was evaluated using MVIC%, and muscle co-contraction was evaluated using the co-contraction index (CI). Results: A statistically significant increase was observed in the MVIC% of the TA, GM, and CI on the three surfaces during SLS compared to BLS, except for the comparison of CI on BB between SLS and BLS (t = -1.35, p = 0.19). The MVIC% of the TA and GM during SLS and BLS on BB was significantly increased in comparison with FG and SM. The CI during BLS on BB increased compared to FG (t = 3.19, p < 0.01) and SM (t = 4.64, p < 0.01). The CI during BLS on SM (t = -1.46, p = 0.15) decreased when compared to FG but without statistical significance. Conclusions: SLS and unstable surfaces can induce greater muscle activation, and SLS can have a greater influence on ankle muscles.

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不同站立稳定性水平下踝关节屈伸活动的表面肌电图分析。
研究背景通过表面肌电图(sEMG)观察在平地(FG)、软垫(SM)和 BOSU 球(BB)表面进行单腿站立(SLS)和双腿站立(BLS)时踝关节肌肉的激活策略。研究方法30 名健康的年轻人参加了研究。在 SLS 和 BLS 过程中,在三种表面上测量了胫骨前肌(TA)和腓肠肌内侧(GM)的肌肉活动。在最大自主等长收缩(MVIC)过程中记录了胫骨前肌(TA)和腓肠肌内侧(GM)的肌电图评估。使用 MVIC% 评估肌肉激活情况,使用共收缩指数 (CI) 评估肌肉共收缩情况。结果:与 BLS 相比,除了 BB 上的 CI 在 SLS 和 BLS 之间的比较(t =-1.35,p = 0.19)外,在 SLS 期间观察到 TA、GM 和 CI 在三个表面上的 MVIC% 有统计学意义的明显增加。与 FG 和 SM 相比,SLS 和 BLS 期间 BB 上 TA 和 GM 的 MVIC% 明显增加。与 FG(t = 3.19,p < 0.01)和 SM(t = 4.64,p < 0.01)相比,BB 上 BLS 期间的 CI 增加了。与 FG 相比,SM(t =-1.46,p = 0.15)上 BLS 期间的 CI 有所下降,但无统计学意义。结论:SLS和不稳定表面可引起更大的肌肉激活,SLS对踝关节肌肉的影响更大。
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期刊介绍: Journal of Orthopaedic Surgery is an open access peer-reviewed journal publishing original reviews and research articles on all aspects of orthopaedic surgery. It is the official journal of the Asia Pacific Orthopaedic Association. The journal welcomes and will publish materials of a diverse nature, from basic science research to clinical trials and surgical techniques. The journal encourages contributions from all parts of the world, but special emphasis is given to research of particular relevance to the Asia Pacific region.
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