Amaç: Bu çalışmanın amacı, bir profesyonel futbol takımında yer alan futbolcuların, oyun pozisyonlarına göre rölatif izokinetik kas kuvvetlerinin karşılaştırılmasıdır. Gereç ve Yöntemler: Araştırmaya, 2019- 2020 Türkiye Futbol 1. Lig sezonunda Akhisarspor Futbol Kulübünde yer alan futbolcular (n=20) katılmıştır. Futbolcuların, rölatif izokinetik kas kuvvetleri 60 ve 300°/sn'de IsoForce izokinetik dinamometre ile ölçülmüştür. Verilerin normallik sınaması, Shapiro-Wilk testi ile test edildi. Normal dağılım göstermeyen verilerin analizinde, ikili karşılaştırmaları için Mann-Whitney U testi kullanıldı. Çoklu karşılaştırmalar için KruskalWallis H testi kullanıldı. Gruplar arası farkın tespiti için 'Pairwise Multiple Comparison Test' kullanıldı. Bulgular: Araştırma bulgularına göre futbolcuların, 60 ve 300°/sn fleksiyon ve ekstansiyon, maksimum ve ortalama kuvvet değerlerinin hem baskın hem de baskın olmayan bacak için istatistiksel olarak farklı olmadığı tespit edilmiştir. Ek olarak, futbolcuların mevkilerine göre 60 ve 300°/sn fleksiyon ve ekstansiyon maksimum kuvvet değerleri arasında istatistiksel olarak fark olmadığı tespit edilmiştir. Ayrıca futbolcuların mevkilerine göre fleksiyon 300°/sn ve ekstansiyonda 60 ve 300°/sn rölatif ortalama kuvvet değeri arasında, hem baskın hem de baskın olmayan bacakları için istatistiksel olarak fark olmadığı tespit edilmiştir. Ek olarak, futbolcuların fleksiyon 60°/sn baskın bacakları arasında da istatistiksel olarak fark olmamasına rağmen baskın olmayan bacakları arasında istatistiksel olarak fark olduğu tespit edilmiştir (p>0,05; p=0,012). Bu sonuca göre forvetlerin 60°/sn baskın olmayan bacaklarının, defans ve orta saha oyuncularına göre daha yüksek medyan değerine sahip olduğu tespit edilmiştir. Sonuç: Profesyonel futbolcuların mevkilerine göre yalnızca baskın olmayan bacak 60°/sn fleksiyon rölatif ortalama kuvvet değerlerinin farklı olduğu, diğer ortalama kuvvet değerlerinin ve maksimum kuvvet değerlerinin farklı olmadığı tespit edilmiştir. Bu sonucun, forvetlerin defans ve orta saha oyuncularına nazaran nondominant bacaklarını daha sık kullanmalarından kaynaklanabileceği düşünülebilir.
Anahtar Kelimeler: Ekstansiyon; fleksiyon; profesyonel futbolcular; rölatif izokinetik kas kuvveti; diz kuvveti
Objective: The aim of this study was to compare the relative isokinetic muscle strengths of professional soccer players according to their game positions. Material and Methods: Soccer players (n=20) of Akhisarspor located in the Turkey Football 1st League participated in this study. Isokinetic muscle strengths of soccer players were measured with IsoForce isokinetic dynamometer at 60 and 300°/sec. The normality test of the data was tested with the Shapiro-Wilk test. Mann-Whitney U test was used for pairwise comparisons in the analysis of non-normally distributed data. Kruskal-Wallis H test was used for multiple comparisons. Pairwise Multiple Comparisons Test was used to determine the source of difference between the groups. Results: According to the findings of the research, it was determined that the peak and average strength values of the soccer players at 60 and 300°/sec flexion and extension were not statistically different for both the dominant and non-dominant legs. In addition, it was determined that there was no statistically difference between the flexion and extension peak strength values of 60 and 300°/sec according to the positions of the soccer players. Moreover, it was determined that there was no statistically difference between both the dominant and non-dominant legs between flexion 300°/sec and the relative average strength value of extension 60 and 300°/sec according to the game positions of the soccer players. In addition, although there was no statistically difference between the flexion dominant legs of soccer players at 60°/sec (p>0.05), there was a statistically difference between the non-dominant legs (p=0.012). According to this result, it was found that the non-dominant legs of the strikers at 60°/sec had a higher median value than the defender and midfielder players. Conclusion: It was determined that according to the positions of professional soccer players, only non-dominant leg 60°/sec flexion relative average strength was different, other average and peak strength values were not different. This result may be due to the strikers using their non-dominant legs more often than the defenders and midfielders.
Keywords: Extension; flexion; professional soccer players; relative isokinetic muscle strength; knee strength
- van Dyk N, Witvrouw E, Bahr R. Interseason variability in isokinetic strength and poor correlation with Nordic hamstring eccentric strength in football players. Scand J Med Sci Sports. 2018;28(8):1878-87.[Crossref] [PubMed]
- Jenkins NDM, Hawkey MJ, Costa PB, Fiddler RE, Thompson BJ, Ryan ED, et al. Functional hamstrings: quadriceps ratios in elite women's soccer players. J Sports Sci. 2013;31(6):612-7.[Crossref] [PubMed]
- Lehance C, Binet J, Bury T, Croisier JL. Muscular strength, functional performances and injury risk in professional and junior elite soccer players. Scand J Med Sci Sports. 2009;19(2):243-51.[Crossref] [PubMed]
- Fousekis K, Tsepis E, Vagenas G. Lower limb strength in professional soccer players: profile, asymmetry, and training age. J Sport Sci Med. 2010;9(3):364-73.[PubMed]
- Pinniger GJ, Steele JR, Groeller H. Does fatigue induced by repeated dynamic efforts affect hamstring muscle function? Med Sci Sports Exerc. 2000;32(3):647-53.[Crossref] [PubMed]
- Reilly T. A motion analysis of work-rate in different positional roles in professional football match-play. J Human Movement Studies. 1976;(2):87-97.
- Magalhães J, Oliveira J, Ascensão A, Soares JMC. [Isokinetic strength assessment in athletes of different sports, ages, gender and positional roles]. Rev Port Ciên Desporto. 2001;1(2):13-21.[Crossref]
- Ruas CV, Minozzo F, Pinto MD, Brown LE, Pinto RS. Lower-extremity strength ratios of professional soccer players according to field position. J Strength Cond Res. 2015;29(5):1220-6.[Crossref] [PubMed]
- Tourny-Chollet C, Leroy D, Léger H, Beuret-Blanquart F. Isokinetic knee muscle strength of soccer players according to their position. Isokinet Exerc Sci. 2000;8(4):187-93.[Crossref]
- Śliwowski R, Grygorowicz M, Hojszyk R, Jadczak Ł. The isokinetic strength profile of elite soccer players according to playing position. PloS One. 2017;12(7):e0182177.[Crossref] [PubMed] [PMC]
- ro Costa Silva JRL, Detanico D, Pupo JD, de la Rocha Freitas C. Bilateral asymmetry of knee and ankle isokinetic torque in soccer players u20 category. Rev Bras Cineantropom Desempenho Hum. 2015;17(2):195-204.[Crossref]
- Iga J, George K, Lees A, Reilly T. Cross‐sectional investigation of indices of isokinetic leg strength in youth soccer players and untrained individuals. Scand. J Med Sci Sports. 2009;19(5):714-9.[Crossref] [PubMed]
- Vieira A, Alex S, Martorelli A, Brown LE, Moreira R, Bottaro M. Lower-extremity isokinetic strength ratios of elite springboard and platform diving athletes. Phys Sportsmed. 2017;45(2):87-91.[Crossref] [PubMed]
- Yilmaz AK, Kabadayi M, Mayda MH, Birinci MC, Özdal M. The effects of isokinetic knee strength on the promptness of soccer players. Eur J Phys Educ Sport Sci. 2017;3(11):114-23.
- Goulart LF, Dias RMR, Altimari LR. [Isokinetic force of under-twenties soccer players: comparison of players in different field positions]. Rev Bras Cineantropom Desempenho Hum. 2007;9(2):165-9.
- Gür H, Akova B, Pündük Z, Küçükoǧlu S. Effects of age on the reciprocal peak torque ratios during knee muscle contractions in elite soccer players. Scand J Med Sci Sports. 1999;9(2):81-7.[Crossref] [PubMed]
- Yılmaz AK, Kabadayı M, Bostancı Ö, Özdal M, Mayda MH. Analysis of isokinetic knee strength in soccer players in terms of selected parameters. Physical Education of Students. 2019;23(4):209-16.[Crossref]
- Barnes C, Archer DT, Hogg B, Bush M, Bradley PS. The evolution of physical and technical performance parameters in the English Premier League. Int J Sports Med. 2014;35(13):1095-100.[Crossref] [PubMed]
- Schuth G, Carr G, Barnes C, Carling C, Bradley PS. Positional interchanges influence the physical and technical match performance variables of elite soccer players. J Sports Sci. 2016;34(6):501-8.[Crossref] [PubMed]
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