《Chinese Journal of Rehabilitation Theory and Practice》 ›› 2023, Vol. 29 ›› Issue (8): 882-889.doi: 10.3969/j.issn.1006-9771.2023.08.003

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Effect of core stability training on dynamic balance and surface electromyography after anterior cruciate ligament reconstruction

MA Shengnan1,2, KE Jingyue1, DONG Hongming1, LI Jianping1, ZHANG Honghao1, LIU Chao1, SHEN Shuang3, LI Guqiang3()   

  1. 1. School of Rehabilitation, Binzhou Medical University, Yantai, Shandong 264003, China
    2. Yantai Affiliated Hospital of Binzhou Medical University, Yantai, Shandong 264003, China
    3. Rehabilitation Engineering Research Institute of Binzhou Medical University, Yantai, Shandong 264003, China
  • Received:2023-03-09 Revised:2023-05-22 Published:2023-08-25 Online:2023-10-09
  • Contact: LI Guqiang E-mail:lgq100@bzmc.edu.cn
  • Supported by:
    Shandong Natural Science Foundation(ZR2022MA047);2021 Undergraduate Teaching Reform Research Project of Shandong Province(M2021213)

Abstract:

Objective To explore the effect of core stability training on dynamic balance and surface electromyography (sEMG) after anterior cruciate ligament reconstruction (ACLR), and to analyze the correlation between balance index and sEMG.
Methods From March to December, 2022, 32 patients with ACLR in Yantai Affiliated Hospital of Binzhou Medical University were randomly divided into control group (n = 16) and experimental group (n = 16). The control group accepted routine rehabilitation treatment, and the experimental group added core stability training, for six weeks. They were evaluated with American Hospital for Special Surgery Knee Score (HSS) and International Knee Documentation Committee Knee Score (IKDC), and the dynamic balance function and sEMG were measured before and after treatment, and the correlation between dynamic balance index and root mean square (RMS) of sEMG was analyzed.
Results After treatment, the scores of HSS and IKDC increased significantly in both groups (|Z| > 3.526, |t| > 63.544, P < 0.001), and were better in the experimental group than in the control group (Z = -2.392, t = 2.650, P < 0.05); the length of gait line and single support line increased significantly, the medial-lateral displacement displacement decreased (|t| > 2.368, Z = -3.516, P < 0.05), and they were better in the experimental group than in the control group (|t| > 2.497, Z = -3.091, P < 0.05); the RMS of gluteus maximus and gluteus medius increased in the experimental group (t = -5.900, Z = -2.741, P < 0.01), and were better than those in the control group (t = 3.930, Z = -3.260, P < 0.01). After treatment, the RMS of gluteus maximus and gluteus medius in both groups were positively correlated with gait line length and single support line length, and were negatively correlated with medial-lateral displacement (|r| > 0.502, P < 0.01).
Conclusion Core stability training could significantly improve knee joint function and dynamic balance, and enhance the activation of gluteus maximus and gluteus medius. Dynamic balance is highly correlated with sEMG.

Key words: anterior cruciate ligament reconstruction, core stability training, dynamic balance, foot, center of pressure, surface electromyography

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