Effects of Six Weeks of Modified and Standard Nordic Hamstring Exercises on Electromyography of Hamstring, Hip And Trunk Muscles and Sprint Performance in Young Male Football Players

Background and Aims hamstring injury is the most common in football. Nordic exercise (NHE) one of best prevention strategies. This study was aims to compare effect six weeks standard NHE modified on electromyography hamstring, hip trunk muscles sprint performance young male football players Methods In this study, participants were 26 Kerman, Iran who selected using purposeful convenience sampling methods randomly divided into two groups (Age: 16.31±0.51 years, Height: 173.08±5.15 cm, weight: 59.85±5.71 kg) 16.41±0.54 173±6.84 weigh: 64.20±8.76 kg). Sprint measured by 20-meter test, activity electromyography. Repeated-measure analysis variance used for data analysis. Results group, there a significant difference between pretest posttest phases electrical biceps femoris (P=0.001), semitendinosus gluteus maximus (P=0.016) erector spinae (P=0.001). although increased 13% femoris, 11% Semitendinosus, 9% 4% muscles, only (P=0.001) Semitendinosus (P=0.024). The results also showed (P=0.021), (P=0.046) (P=0.039). Conclusion Both are effective preventing increasing Biceps but more changing parameters training load.