Effects of School Sports Spaces on Electromyography Activity of Lower Limb and Erector Spinae Muscles during Running in Students

The aim of this study was to evaluate the effects of school sport spaces on electromyography activity of lower limb and erector spinae muscles during running in students.Fifteen students with an age range between ۱۰ to ۱۴ years from schools with suitable sport facilities and fifteen students with the same age range from schools with inappropriate sport spaces. A wireless electromyography system with ۸ pairs of bipolar surface electrodes (sample rate: ۲۰۰۰ Hz) was used to record the electromyography activity of back and lower limb muscles during running. The results showed that during the loading response phase, median frequency of the tibialis anterior (p=۰.۰۰۵, d=۱.۲۷) and medial gastrocnemius (p=۰.۰۲۱, d=۰.۹۳) muscles in the suitable sport facilities group were higher than that the other group by ۱۳.۴۵% and ۳۸.۲۸%, respectively. Also, during the propulsion phase, median frequency of biceps femoris muscle in the suitable sport facilities group was higher than that the other group by ۲۸.۸۸% (p=۰.۰۰۲, d=۱.۳۷). In addition, during the loading response phase, amplitude of medial gastrocnemius (p=۰.۰۲۴, d=۰.۸۴) and erector spinae (p=۰.۰۱۴, d=۰.۸۵) muscles in the suitable sport facilities group were lower than other group by ۳۵.۵۵% and ۴۳.۲۹%, respectively. The results of this study showed that students in schools with suitable sport facilities have better performance of the lower limb and erector spinae muscles while running, which reduces the chance of injury during running.

کلیدواژه ها:

Electromyography ، Frequency spectrum ، Students ، Running