Chinese Journal of Tissue Engineering Research ›› 2019, Vol. 23 ›› Issue (15): 2320-2326.doi: 10.3969/j.issn.2095-4344.1151

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Muscle activation characteristics during two balance tests in patients with functional ankle instability

Sun Chenguang1, Wang Chun2   

  1.  (1Department of Science and Research, 2College of Continuing Studies, Chengdu Sport Institute, Chengdu 610041, Sichuan Province, China)
  • Received:2018-11-06 Online:2019-05-28 Published:2019-05-28
  • Contact: Wang Chun, Professor, College of Continuing Studies, Chengdu Sport Institute, Chengdu 610041, Sichuan Province, China
  • About author:Sun Chenguang, Master, Research assistant, Department of Science and Research, Chengdu Sport Institute, Chengdu 610041, Sichuan Province, China
  • Supported by:

    the Key Research and Development Project of Science & Technology Department of Sichuan Province, No. 2017SZ0018 (to WC)

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Abstract:

BACKGROUND: Studies have found that abnormal muscle activation in the feet of functional ankle instability patients is inconsistent, and whether wearing shoes or not affects the performance of the foot muscles is rarely reported.
OBJECTIVE: To investigate the activation of the soleus muscle and peroneus longus muscle of the lower extremities in functional ankle instability patients in double-to-single-leg stance test and single-leg landing test under the conditions of wearing shoes and barefoot.
METHODS: Fifteen patients with functional ankle instability and 15 healthy individuals (control group) were recruited from a university in the western China. Double-to-single-leg stance test and single-leg landing test were performed under the two conditions of wearing shoes and barefoot. The surface electromyography of peroneus longus muscle and solesus muscles in two tasks were monitored, and appropriate statistical methods were applied to the relevant indicators.
RESULTS AND CONCLUSION: (1) In double-to-single-leg stance test, the start-up time and pre-muscle activation of the soleus muscle and peroneus longus muscle of the functional ankle instability patients and the controls were not affected by whether or not wearing shoes. But the responsiveness of muscle activation of the two muscles was obviously affected by group factors, which showed that the functional ankle instability patients were significantly weaker than the controls. (2) In the single-leg landing test, the start-up time of the soleus muscle and the peroneus longus muscle was not affected by the group factor. However, the start-up time of the functional ankle instability patients wearing shoes was significantly shorter than that in the barefoot condition. (3) In the single-leg landing test, the pre-muscle activation of the soleus muscle and the peroneus longus muscles was not related to the group and whether wearing shoes or barefoot. But the reactive muscle activation in the functional ankle instability group was significantly weaker than that in the control group, and the barefoot group was significantly higher than the footwear group. (4) These results suggest that during double-to-single-leg stance test and single-leg landing test, functional ankle instability significantly affects the degree of activation of the soleus muscle and peroneus longus muscle, and whether or not wearing shoes affects the start-up time and responsiveness of muscle activation. Therefore, wearing shoes may influence the control of ankle neuromotor to some extent, and this effect becomes more prominent as the difficulty of testing increases.

中国组织工程研究杂志出版内容重点：组织构建；骨细胞；软骨细胞；细胞培养；成纤维细胞；血管内皮细胞；骨质疏松；组织工程

Key words: Ankle Joint, Electromyography, Joint Instability, Tissue Engineering

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