Skillnaden i muskelstyrka mellan dominant och ickedominant ben hos fotbollspelare hartidigare studerats. Det finns inget enhälligt resultat om vilket ben som är starkast eller om detalls föreligger någon skillnad. Tidigare forskning har utfört mätningarna i sittandeutgångsposition vilket inte stämmer överens med fotbollspelares huvudsakliga aktivitet. Syftetmed uppsatsen var att, hos en grupp fotbollspelare i division ett och två, beskriva och jämföraden maximala muskelstyrkan mellan dominant och ickedominant ben. Datainsamlingenutfördes i en liggande utgångsposition då detta ger liknande muskellängdsförhållandet somvid stående. Mätinstrumentet var dragapparaten Genesis Single från Inmotion Intelligence.Studien är en beskrivande, jämförande tvärsnittsstudie. Urvalet bestod av en grupp manligafotbollspelare i svenska division ett och två.Resultatet i studien visade ingen signifikant skillnad i maximal muskelstyrka mellan dominantoch ickedominant ben. Vinkeln av knäflexion vid vilken knäflexorer respektive knäextensorerutvecklar maximal muskelstyrka, skiljer sig inte mellan dominant och ickedominant ben. Vadgäller den, ur maximal muskelstyrkesperspektiv, optimala vinkeln visar resultatet attknäflexorer inte utvecklar maximal styrka vid samma grad av flexion som knäextensorerna.Detta gäller både dominant och ickedominant ben. Fotboll är en sidodominant idrott menstudiens resultat tyder på att fotbollsutövande inte leder till muskulär obalans mellandominant och icke dominant ben. / The difference in muscle power between dominant and non-dominant leg in soccer has beenpreviously studied. There is no consensus on which leg is stronger or whether a differenceexists or not. Previous research conducted measurements in a seated starting position whichdoes not conform to the soccer player's main activity.The purpose of this study was, in a group of soccer players in Swedish first and seconddivision, to describe and compare the maximum muscle power between dominant and nondominantleg. Measurements were performed in a horizontal starting position as this givessimilar muscle length ratio as when standing. The machine used during the measurements wasGenesis Single from Inmotion Intelligence. The study was conducted with a descriptive andcomparative cross-sectional design. The sample consisted of a group of male soccer players inthe Swedish first and second division.The results of the study showed no significant difference in peak muscle power betweendominant and non-dominant leg. The angle of knee flexion in which knee flexors and kneeextensors develop maximum muscle power, did not differ between dominant and nondominantleg. The results showed that knee extensors did not produce maximum musclepower at the same degree of knee flexion as the knee flexors did. This applied to bothdominant and non-dominant leg. Football is a side dominant sport, but the study's resultssuggest that football practice will not lead to muscular imbalance between dominant and nondominantleg.

Title: Effect of extended physical education in children under school age. Objective: The project aims to find out whether pupils with extended physical education will achieve better results in functional muscle tests than children with standard two-hour physical education lessons per week. Methods: This is a pilot study where the quantitative nature of the research based on a comparison of the results of six functional muscle tests on shortened muscle groups predominates. Pupils were divided into two groups according to the number of physical education hours per week. Pearson's chi-square test was used to determine the level of muscle shortening, the significance level was set at α <0.05. Results: In the individual tests of functional muscle tests, pupils with three hours of physical education per week were better in most cases. Statistical analysis of the prevalence of individual types of muscle group weakness revealed a significantly better result (p ˂ 0.05) in three functional muscle tests. Specifically in postural stereotype according to Mathias, Thomayer exam and lateral flexion exam by pupils with extended TV. Key words: Muscular imbalance, younger school age, extended physical education.