Introduktion: Fotboll är en av de mest skadedrabbade idrotterna. 70-90% av skadorna är lokaliserade i nedre extremiteter. Den vanligaste skadan är hamstringsruptur och utgör 37% av skador i nedre extremiteter. Det finns idag mycket forskning gjord på hamstringsrupturer hos manliga fotbollsspelare, men skadefrekvensen för hamstringsrupturen minskar inte. Syfte: Studiens syfte är att bidra med ökad medvetenhet och kunskap om uppkomst, rehabilitering och preventiva åtgärder på hamstringsrupturer för tränare i manliga fotbollslag. Metod: Studien har sammanställt redan befintlig litteratur om de valda område för att besvara studiens syfte. Studiens valda metod är en litteraturstudie. Resultat: (1) Uppkomst: Höghastighetssprint & förlängning. (2) Rehabilitering: Individuell konservativ behandling. (3) Preventiva åtgärder: Excentriska övningar ex: Nordic hamstrings exercise, Asklings glider. Slutsats: Mer kunskap behövs inom området, både för tränare och spelare i idrottsföreningar, och kunskapen måste presenteras på ett användbart sätt. / Introduction: Soccer is one of the most injured sports. 70-90% of the injuries are located in the lower extremities. The most common injury is hamstring strain and accounts for 37% of lower limb damage. There is a lot of research done today on hamstring strains for male soccer players, but the injury rate for hamstring strains is not diminishing. Purpose: This study wants to contribute to increased awareness and knowledge of the origin, rehabilitation and prevention of hamstring strains for coaches in male football teams. Method: The study has complied already existing literature on the chosen areas to answer the purpose of the study. The chosen method on the study is a literature study. Result: (1) Origin: High Speed Sprint & extension. (2) Rehabilitation: Individual conservative treatment. (3) Preventive measures: Eccentric exercises eg: Nordic hamstrings training, Askling Glider. Conclusion: More knowledge is needed in the field, for both athletes and coaches, and the knowledge must be presented in a useful way.

Bibliographical record: KUDLÁČEK, Jiří. EMG study: Nordic hamstring exercises vs. isometric training. Prague: Charles Univerzity, 2nd Faculty of Medicine, Department of Rehabilitation and Sports Medicine, 2020, 79p. Supervisor MUDr. Kryštof Slabý. Abstract This thesis is an EMG study, which examines an electric activity of knee flexors and m. quadriceps femoris during 3 types of exercises: Nordic hamstring exercise, single leg sliding leg curl, and isometric contraction. The theoretical part summarizes anatomy, physiology, and kinesiology of the musculoskeletal system, as well as the principle of surface EMG. In the experimental part, the EMG study was conducted on 20 healthy individuals aged 20 to 30 years-old. Each patient underwent an applied kinesiology procedure and subsequently went through an 16 channel surface EMG technique. The aim of this work is to compare the maximal and average value of the EMG amplitude of particular muscles during each exercise. While providing Nordic hamstring exercise and single leg slide, the light was shed on a question of whether there is a statistically significant difference between activation of m. biceps femoris and m. semitendinosus in terms of EMG values. The following phase of the thesis scrutinized the timing of hamstring muscles during Nordic hamstring...