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MEDICINA DELLO SPORT
A Journal on Sports Medicine
Official Journal of the Italian Sports Medicine Federation
Indexed/Abstracted in: BIOSIS Previews, EMBASE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 0,163
Medicina dello Sport 2016 June;69(2):254-66
language: English, Italian
The comparison of lower and upper extremity muscles activation during sudden ankle supination in patients with and without chronic ankle instability
Ali YALFANI, Farzaneh GANDOMI
Department of Sport Injuries and Corrective Exercises, Faculty of Physical Education, Bu-Ali Sina University, Hamedan, Iran
BACKGROUND: The purpose of this study was comparison of lower and upper extremity muscles activation during sudden ankle supination in patients with and without chronic ankle instability (CAI).
METHODS: In this study, 50 professional athletes were selected based on three questionnaires: FADI, FADI-Sport Criterion and Ankle Instability Questionnaire. The research’s subjects divided to health and injured groups that every health and injured groups was consist of 11 female and 14 male. Then participants were equipped with electrodes on the tibialis anterior (TA), peroneus longus (PL), gastrocnemius lateralis (GL), soleus, gluteus medius (Gmed) and maximus (Gmax) muscles. Then we requested participants to drop off a 20-cm-high on ankle supinator device. Two aware task and two unaware task data was recorded.
RESULTS: The MANOVA results showed that there was not a significant interaction between group × task types: F(17,164)=0.90, P=0.60, Wilks’s Λ=0.70 and η2=0.08. Also, we did not observe a significant difference for main effect of task types: F(51,498)=0.80, P=0.67, Wilks’s Λ=0.70 and η2=0.07. But we saw a significant difference for main effect of groups: F(17,164)=2.74, P=0.001, Wilks’s Λ=0.70 and η2=0.22. Tukey test results showed that gastrocnemius electromyographic (EMG) feedback, gluteus medius EMG feedforward, soleus EMG feedback, peroneus longus EMG feedback, sum of lower kinetic chain EMG feedback were different between health and CAI groups. According to these results, we may state that muscles feedback and feedforward utilizing depended on ankle situation. In this study, we used to artificial ankle sprain situation and saw that in instable and unexpected situation applied local and global muscles in chronic ankle sprain subjects differently.
CONCLUSIONS: Based on the results of this research, we can recommend the use of a supinator device in rehabilitation exercises for ankle instability.