Determination of Selected Lower Limb Muscles Electromyography Frequency Spectrum in Male Soccer Players with ACL Injury during Three Running Patterns

The aim of this study was to evaluate electromyography frequency spectrum of selected lower limb muscles in males with ACL injury during three different running patterns. Fourteen soccer players with ACL injury and 14 healthy soccer players were volunteered to participate in the study. A wireless electromyography system with 8 pairs of bipolar surface electrodes was used to record the electromyography frequency spectrum during three running patterns. The results showed that the median frequency of tibia anterior muscle in the ACL injury group during propulsion phase in the rear-foot strike running pattern was greater compared to the healthy group (p= 0.024). The median frequency of semitendinosus muscle in the propulsion phase in mid-foot running patterns in the ACL group was higher compared to the healthy group (p=.0.044). Also, the median frequency of semitendinosus muscle in the loading response phase in forefoot running patterns in the ACL group was greater compared to the healthy group (p= 0.028). According to the research results, it can be stated increased agonist and antagonist muscle activity across different running patterns increase the risk of secondary injury in people with ACL injuries.