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2014 | 42 | 1 | 175-185

Article title

Changes in Muscle Strength in U19 Soccer Players During an Annual Training Cycle


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The aim of the study was to investigate the seasonal variation in isokinetic strength of the knee flexors and extensors, and conventional (H/QCONV) and functional (H/QFUNC) hamstring to quadriceps strength ratios in highly trained adolescent soccer players. The players (n=11; age 17.8±0.3) were measured at the end of the competitive season (autumn), at the beginning and the end of pre-season (winter) and during the sixth week of a new competitive season. Isokinetic peak torque (concentric and eccentric) was measured at 60°•s-1 in a sitting position with the hip flexed at 100°. The testing range of motion was set from 10 - 90° of knee flexion. The players performed a set of five maximum repetitions for both the dominant and non-dominant leg. Statistically significant differences (p<0.001) between the four seasonal measurements were noted for peak torque of the dominant leg knee flexors in concentric muscle action only. A post hoc analysis revealed a statistically significant increase in peak torque from the 1st to the 4th measurement (p<0.001; d=0.692) and from the 2nd to the 4th (p<0.01; d=0.564). The differences in the changes of peak torque of the knee flexors and extensors depending on type of muscle action and tendencies found in the H/Q ratios throughout the annual training cycle indicate that strength assessment of the knee flexors and extensors and their balance throughout the annual training cycle could be beneficial for elite male adolescent soccer players both in terms of performance and risk of injury.










Physical description


1 - 10 - 2014
10 - 10 - 2014


  • Faculty of Physical Culture, Palacký University in Olomouc, Czech Republic
  • Faculty of Physical Culture, Palacký University in Olomouc, Czech Republic
  • School of Sport and Exercise, University of Gloucestershire, Gloucester, United Kingdom


  • Aagaard P, Simonsen, EB, Magnusson SP, Larsson B, Dyhre-Poulsen P. A new concept for isokinetic hamstring: quadriceps muscle strength ratio. Am J Sports Med, 1998; 26: 231-237[PubMed]
  • Aagaard P, Simonsen, EB, Trolle M, Bangsbo J, Klausen K. Isokinetic hamstring/quadriceps strength ratio: influence from joint angular velocity, gravity correction and contraction mode. Acta Physiol Scand, 1995; 154: 421-427[PubMed][Crossref]
  • Botek Z, Gaba A, Lehnert M, Pridalova M, Varekova R, Botek M, Langer F. Condition and Body Constitution of Soccer players category U19 before and after Completing the preparatory period. Acta Univ Palack Olomuc Gymn, 2010; 40: 47-54
  • Cerrah AO, Gungor EO, Soylu AR, Ertan H, Lees A, Bayrak C. Muscular activation patterns during the soccer in-step kick. Isokinet Exerc Sci; 2011; 19: 181-190[WoS]
  • Cohen J. Statistical power analysis for the behavioral sciences. New Jersey: Lawrence Erlbaum Associates, Inc.; 1998
  • Coombs R, Garbutt G. Developments in the use of the hamstring/quadriceps ratio for the assessment of muscle balance. J Sport Sci Med, 2002; 1: 56-62
  • Cotte T, Chatard JC. Isokinetic strength and sprint times in English premier league football players. Biol Sport, 2011; 28: 89-94[Crossref]
  • Croisier JL, Ganteaume S, Binet J, Genty M, Ferret JM. Strength imbalances and prevention of hamstring injury in professional soccer players: A prospective study. Am J Sport Med, 2008; 36: 1469-1475[Crossref][WoS]
  • De Ste Croix MB, Deighan MA, Armstrong N. Assessment and interpretation of isokinetic muscle strength during growth and maturation. Sports Med, 2003; 33: 727-744
  • Eniseler N, Şahan Ç, Vurgun H, Mavi HF. Isokinetic strength responses to season-long training and competition in turkish elite soccer players. J Hum Kinet, 2012; 31: 159-168
  • Fleck SJ, Kraemer WJ. Designing resistance training programs. Champaign, IL: Human Kinetics; 1987
  • Forbes HA, Sutcliffe S, Lovell A, McNaughton LR, Siegler JC. Isokinetic thigh muscle ratio in youth football: effect of age and dominance. Int J Sports Med, 2009; 30: 602-606[Crossref][PubMed][WoS]
  • Gerodimos V, Mandou V, Zafeiridis A, Ioakimidis P, Stavropoulos N, Kellis S. Isokinetic peak torque and hamstring/quadriceps ratios in young basketball players. J Sport Med Phys Fit, 2003; 43: 444-452
  • Heiser TM, Weber J, Sullivan G, Clare P, Jacobs RR. Prophylaxis and management of hamstring muscle injuries in intercollegiate football players. Am J Sports Med, 1984; 12: 368-37[Crossref][WoS][PubMed]
  • Hoff J. Training and testing physical capacities for elite soccer players. J Sport Sci, 2005; 23: 573-582[Crossref]
  • Hughes G, Watkins J. A risk-factor model for anterior cruciate ligament injury. Sports Med, 2006; 36: 411-428[Crossref][PubMed]
  • 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 Spor, 2009; 19: 714-719[WoS][Crossref]
  • Kellis S, Gerodimos V, Kellis E, Manou V. Bilateral isokinetic concentric and eccentric strength profile of the knee extensors and flexors in young soccer players. Isokinet Exerc Sci, 2001; 9: 31-39
  • 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 Spor, 2009; 19: 243-251[WoS]
  • Lohmander LS, Englund PM, Dahl LL, Roos EM. The long term consequence of anterior cruciate ligament and meniscus injuries: osteoarthritis. Am J Sports Med, 2007; 35: 1756-1769[Crossref]
  • Malliou P, Ispirlidis I, Beneka A, Taxildaris K, Godolias G. Vertical jump and knee extensors isokinetic performance in professional soccer players related to the phase of the training period. Isokinet Exerc Sci, 2003; 11: 165-169
  • Maly T, Zahalka F, Mala L. Isokinetic strength, ipsilateral and bilateral ratio of peak muscle torque in knee flexors and extensors in elite young soccer players. Acta Kin, 2010; 4: 17-23
  • Mujika I, Padilla S. Detraining: Loss of training-induced physiological and performance adaptations. Part I. Sports Med, 2000a; 30: 79-87[PubMed][Crossref]
  • Mujika I, Padilla S. Detraining: Loss of training-induced physiological and performance adaptations. Part II. Sports Med, 2000b; 30: 145-154[Crossref][PubMed]
  • Psotta R, Bunc V, Hendl J, Tenney D, Heller J. Is repeated sprint ability of soccer players predictable from field-based or laboratory physiological tests? J Sports Med Phys Fitness, 2011; 51: 18-25[PubMed]
  • Proske U, Morgan DL, Brockett CL, Percival P. Identifying athlets at risk of hamstrings strains and how to protect them. Clin Exp Pharmacol P, 2004; 31: 546-550[Crossref]
  • Sangnier S, Tourny-Chollet C. Comparison of the decrease in strength between hamstring and quadriceps during isokinetic fatigue testing in semiprofessional soccer players. Int J Sports Med, 2007; 28: 952-957[WoS][Crossref][PubMed]
  • Stølen T, Chamari K, Castagna C, Wisloff U. Physiology of soccer. Sports Med, 2005; 35: 501-536[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: 187-193
  • Walden M, Hagglund M, Werner J, Ekstrand J. The epidemiology of anterior cruciate ligament injury in football (soccer): A review of the literature from a gender-related perspective. Knee Surg Sport Tr A 2011; 13.3-10[Crossref][WoS]

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