%0 Journal Article %A Samadi, H %A Rajabi, R %T Comparing the Onset of Pre-Activity of Leg Muscles between Athletes with Functional Ankle Instability and Healthy Athletes During Landing from a Jump %J Journal of Babol University of Medical Sciences %V 19 %N 11 %U http://jbums.org/article-1-6762-en.html %R 10.18869/acadpub.jbums.19.11.7 %D 2017 %K Ankle Injury, Joint Instability, Surface Electromyography, %X BACKGROUND AND OBJECTIVE: Functional ankle instability (FAI) is one of the most commonly debilitating complications of acute ankle sprain, which often results in the athlete staying away from exercise for a while. Disorder in the mechanism of feedforward neuromuscular control can be one of the main reasons for this issue. Musculoskeletal pre-activity during landing is an important indicator of this kind of control. The aim of this study was to compare the sequence of pre-activity of leg muscles between athletes with functional ankle instability and healthy athletes during landing from a jump. METHODS: This cross-sectional study was conducted among 2 groups of athletes including 12 athletes with functional ankle instability and 12 athletes with healthy athletes. The onset of pre-activity of fibularis longus, tibialis anterior and soleus muscles, was recorded and compared using the surface electromyography during landing from a jump. FINDINGS: The onset of pre-activity of fibularis longus, tibialis anterior and soleus muscles in athletes with functional ankle instability (163.44±24.92, 140.75±13.54 and 169.67±41.13 milliseconds, respectively) was slower than and healthy athletes (242.75±34.15, 208.71±26.44 and 247.11±26.37 milliseconds, respectively) during landing from a jump (p<0.01). CONCLUSION: Results of the present study indicated that the onset of pre-activity of fibularis longus, tibialis anterior and soleus muscles in athletes with functional ankle instability was slower than healthy athletes during landing from a jump. %> http://jbums.org/article-1-6762-en.pdf %P 7-13 %& 7 %! %9 Interventional %L A-10-3187-1 %+ Shahid Rajaei Teacher Training University %G eng %@ 1561-4107 %[ 2017