REVIEW PAPER
Asymmetries of isokinetic strength and flexibility in young soccer players: a systematic review
1
School of Physical Education and Sports, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
2
Medical Department, Club de Regatas Vasco da Gama, Rio de Janeiro, Brazil
3
Graduate Program in Clinical Medicine, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
Submission date: 2020-10-25
Acceptance date: 2021-03-26
Publication date: 2022-02-21
Hum Mov. 2022;23(4):21-33
KEYWORDS
TOPICS
ABSTRACT
Purpose:
The study aim was to review the isokinetic strength assessment protocols, the obtained peak torque (PT) values, and the hamstring/quadriceps ratio (H/Q); review the unilateral evaluation protocols and normative values for flexibility; and verify the existence of asymmetries between the limbs, muscle imbalances, or bilateral differences (BD) in the strength and flexibility of young soccer players.
Methods:
The PRISMA model was used. Searches were conducted in PubMed, SciELO, and LILACS, divided into soccer, isokinetic, and flexibility. Inclusion criteria: articles with a sample of young elite male soccer players with an average age less than 20 years; isokinetic strength assessment: presentation of values for absolute PT and/or H/Q ratio; flexibility assessment: use of unilateral tests for the hip flexion movement. The quality and risk of bias in each study were also analysed.
Results:
In the isokinetic strength, a symmetrical pattern was observed for PT and the H/Q ratio between the limbs and divergent results for BD. Regarding flexibility, it was possible to verify a tendency towards an asymmetry of flexibility, with a more flexible dominant than non-dominant leg. Evaluation protocols and normative values were proposed for the tests of isokinetic strength and flexibility.
Conclusions:
Imbalances for the H/Q ratio, asymmetries, and BD for isokinetic strength and flexibility are not natural aspects of the modality and should be avoided in young soccer players. The monitoring of these characteristics and the use of interventions to restore a symmetrical pattern have become essential since the beginning of sports life.
The study aim was to review the isokinetic strength assessment protocols, the obtained peak torque (PT) values, and the hamstring/quadriceps ratio (H/Q); review the unilateral evaluation protocols and normative values for flexibility; and verify the existence of asymmetries between the limbs, muscle imbalances, or bilateral differences (BD) in the strength and flexibility of young soccer players.
Methods:
The PRISMA model was used. Searches were conducted in PubMed, SciELO, and LILACS, divided into soccer, isokinetic, and flexibility. Inclusion criteria: articles with a sample of young elite male soccer players with an average age less than 20 years; isokinetic strength assessment: presentation of values for absolute PT and/or H/Q ratio; flexibility assessment: use of unilateral tests for the hip flexion movement. The quality and risk of bias in each study were also analysed.
Results:
In the isokinetic strength, a symmetrical pattern was observed for PT and the H/Q ratio between the limbs and divergent results for BD. Regarding flexibility, it was possible to verify a tendency towards an asymmetry of flexibility, with a more flexible dominant than non-dominant leg. Evaluation protocols and normative values were proposed for the tests of isokinetic strength and flexibility.
Conclusions:
Imbalances for the H/Q ratio, asymmetries, and BD for isokinetic strength and flexibility are not natural aspects of the modality and should be avoided in young soccer players. The monitoring of these characteristics and the use of interventions to restore a symmetrical pattern have become essential since the beginning of sports life.
REFERENCES (38)
2.
Daneshjoo A, Rahnama N, Mokhtar AH, Yusof A. Bilateral and unilateral asymmetries of isokinetic strength and flexibility in male young professional soccer players. J Hum Kinet. 2013;36:45–53; doi: 10.2478/hukin-2013-0005.
3.
Akbulut T, Agopyan A. Effects of an eight-week proprioceptive neuromuscular facilitation stretching program on kicking speed and range of motion in young male soccer players. J Strength Cond Res. 2015;29(12):3412–3423; doi: 10.1519/JSC.0000000000001015.
4.
DeLang MD, Kondratek M, DiPace LJ, Hew-Butler T. Collegiate male soccer players exhibit between-limb symmetry in body composition, muscle strength, and range of motion. Int J Sports Phys Ther. 2017;12(7):1087–1094; doi: 10.16603/ijspt20171087.
5.
Fousekis K, Tsepis E, Poulmedis P, Athanasopoulos S, Vagenas G. Intrinsic risk factors of non-contact quadriceps and hamstring strains in soccer: a prospective study of 100 professional players. Br J Sports Med. 2011; 45(9):709–714; doi: 10.1136/bjsm.2010.077560.
6.
Terreri ASAP, Greve JMD, Amatuzzi MM. Isokinetic evaluation of athletes’ knee [in Portuguese]. Rev Bras Med Esporte. 2001;7(5):170–174; doi: 10.1590/S1517-86922001000200004.
7.
Costa Silva JRL, Detanico D, Dal Pupo J, 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; doi: 10.5007/1980-0037.2015v17n2p195.
8.
De Lira CAB, Mascarin NC, Vargas VZ, Vancini RL, Andrade MS. Isokinetic knee muscle strength profile in Brazilian male soccer, futsal, and beach soccer players: a cross-sectional study. Int J Sports Phys Ther. 2017;12(7):1103–1110; doi: 10.16603/ijspt20171103.
9.
Śliwowski R, Jadczak Ł, Hejna R, Wieczorek A. The effects of individualized resistance strength programs on knee muscular imbalances in junior elite soccer players. PLoS One. 2015;10(12):e0144021; doi: 10.1371/journal.pone.0144021.
10.
Maly T, Zahalka F, Mala L. Unilateral and ipsilateral strength asymmetries in elite youth soccer players with respect to muscle group and limb dominance. Int J Morphol. 2016;34(4):1339–1344; doi: 10.4067/S0717-95022016000400027.
11.
Gür H, Akova B, Pündük Z, Küçükoğlu 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):81–87; doi: 10.1111/j.1600-0838.1999.tb00213.x.
12.
Seabra A, Marques E, Brito J, Krustrup P, Abreu S, Oliveira J, et al. Muscle strength and soccer practice as major determinants of bone mineral density in adolescents. Joint Bone Spine. 2012;79(4):403–408; doi: 10.1016/j.jbspin.2011.09.003.
13.
Daneshjoo A, Mokhtar A, Rahnama N, Yusof A. The effects of injury prevention warm-up programmes on knee strength in male soccer players. Biol Sport. 2013;30(4):281–288; doi: 10.5604/20831862.1077554.
14.
Rey E, Padrón-Cabo A, Barcala-Furelos R, Mecías-Calvo M. Effect of high and low flexibility levels on physical fitness and neuromuscular properties in professional soccer players. Int J Sports Med. 2016;37(11):878–883; doi: 10.1055/s-0042-109268.
15.
Sanz A, Pablos C, Ballester R, Sánchez-Alarcos JV, Huertas F. Range of motion and injury occurrence in elite Spanish soccer academies. Not only a hamstring shortening-related problem. J Strength Cond Res. 2020;34(7):1924–1932; doi: 10.1519/JSC.0000000000003302.
16.
Ramos S, Simão R, Herdy C, Costa P, Dias I. Relationship between strength and flexibility levels in young soccer players. Apunts Sports Med. 2019;54(203):85–90; doi: 10.1016/j.apunts.2018.11.005.
17.
Pfirrmann D, Herbst M, Ingelfinger P, Simon P, Tug S. Analysis of injury incidences in male professional adult and elite youth soccer players: a systematic review. J Athl Train. 2016;51(5):410–424; doi: 10.4085/1062-6050-51.6.03.
18.
McCall A, Carling C, Davison M, Nedelec M, Le Gall F, Berthoin S, et al. Injury risk factors, screening tests and preventative strategies: a systematic review of the evidence that underpins the perceptions and practices of 44 football (soccer) teams from various premier leagues. Br J Sports Med. 2015;49(9):583–589; doi: 10.1136/bjsports-2014-094104.
19.
Moher D, Liberati A, Tetzlaff J, Altman DG. Preferred Reporting Items for Systematic Reviews and Meta-Analyses: the PRISMA statement. PLoS Med. 2009;6(7);e1000097; doi: 10.1371/journal.pmed.1000097.
20.
Downs SH, Black N. The feasibility of creating a checklist for the assessment of the methodological quality both of randomised and non-randomised studies of health care interventions. J Epidemiol Community Health. 1998;52(6):377–384; doi: 10.1136/jech.52.6.377.
21.
Figueiredo T, de Salles BF, Dias I, Reis VM, Fleck SJ, Simão R. Acute hypotensive effects after a strength training session: a review. Int Sportmed J. 2014;15(3):308–329.
22.
Forbes H, Sutcliffe S, Lovell A, McNaughton LR, Siegler JC. Isokinetic thigh muscle ratios in youth football: effect of age and dominance. Int J Sports Med. 2009;30(8):602–606; doi: 10.1055/s-0029-1202337.
23.
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):243–251; doi: 10.1111/j.1600-0838.2008.00780.x.
24.
Daneshjoo A, Mokhtar AH, Rahnama N, Yusof A. The effects of injury preventive warm-up programs on knee strength ratio in young male professional soccer players. PLoS One. 2012;7(12):e50979; doi: 10.1371/journal.pone.0050979.
25.
Lehnert M, Xaverová Z, De Ste Croix M. Changes in muscle strength in U19 soccer players during an annual training cycle. J Hum Kinet. 2014;42(1):175–185; doi: 10.2478/hukin-2014-0072.
26.
Chiamonti Bona C, Tourinho Filho H, Izquierdo M, Pires Ferraz RM, Marques MC. Peak torque and muscle balance in the knees of young U-15 and U-17 soccer athletes playing various tactical positions. J Sports Med. Phys Fitness. 2017;57(7–8):923–929; doi: 10.23736/S0022-4707.16.06458-6.
27.
Eustace SJ, Page RM, Greig M. Angle-specific isokinetic metrics highlight strength training needs of elite youth soccer players. J Strength Cond Res. 2020;34(11):3258–3265; doi: 10.1519/JSC.0000000000002612.
28.
Harper DJ, Jordan AR, Kiely J. Relationships between eccentric and concentric knee strength capacities and maximal linear deceleration ability in male academy soccer players. J Strength Cond Res. 2021;35(2):465–472; doi: 10.1519/JSC.0000000000002739.
29.
Croisier J-L, Ganteaume S, Binet J, Genty M, Ferret J-M. Strength imbalances and prevention of hamstring injury in professional soccer players: a prospective study. Am J Sports Med. 2008;36(8):1469–1475; doi: 10.1177/0363546508316764.
30.
DeLang MD, Rouissi M, Bragazzi NL, Chamari K, Salamh PA. Soccer footedness and between-limbs muscle strength: systematic review and meta-analysis. Int J Sports Physiol Perform. 2019;14(5):551–562; doi: 10.1123/ijspp.2018-0336.
31.
Manfredini Baroni B, Ruas CV, Ribeiro-Alvares JB, Silveira Pinto R. Hamstring-to-quadriceps torque ratios of professional male soccer players: a systematic review. J Strength Cond Res. 2020;34(1):281–293; doi: 10.1519/JSC.0000000000002609.
32.
Read PJ, Jimenez P, Oliver JL, Lloyd RS. Injury prevention in male youth soccer: current practices and perceptions of practitioners working at elite English academies. J Sports Sci. 2018;36(12):1423–1431; doi: 10.1080/02640414.2017.1389515.
33.
Otero-Esquina C, de Hoyo Lora M, Gonzalo-Skok Ó, Domínguez-Cobo S, Sánchez H. Is strength-training frequency a key factor to develop performance adaptations in young elite soccer players? Eur J Sport Sci. 2017;17(10):1241–1251; doi: 10.1080/17461391.2017.1378372.
34.
Sporis G, Vucetic V, Jovanovic M, Jukic I, Omrcen D. Reliability and factorial validity of flexibility tests for team sports. J Strength Cond Res. 2011;25(4):1168–1176; doi: 10.1519/JSC.0b013e3181cc2334.
35.
Witvrouw E, Danneels L, Asselman P, D’Have T, Cambier D. Muscle flexibility as a risk factor for developing muscle injuries in male professional soccer players: a prospective study. Am J Sports Med. 2003;31(1):41–46; doi: 10.1177/03635465030310011801.
36.
Ribeiro-Alvares JB, Pinto Dornelles M, Gassen Fritsch C, de Lima-e-Silva FX, Menezes Medeiros T, Severo-Silveira L, et al. Prevalence of hamstring strain injury risk factors in professional and under-20 male football (soccer) players. J Sport Rehabil. 2020;29(3):339–345; doi: 10.1123/jsr.2018-0084.
37.
Vasconcellos F, Salles P, Achour A, de Mello DB, Dantas EHM. The vertical jump height of soccer players after static overstretching. Hum Mov. 2012;13(1):4–7; doi: 10.2478/v10038-011-0047-1.
38.
Herdy CV, Galvao P, Costa e Silva G, Ramos S, Simao R, Pedrinelli A, et al. Knee flexion and extension strength in young Brazilian soccer players: the effect of age and position. Hum Mov. 2018;19(3):23–29; doi: 10.5114/hm.2018.76076.
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