The scientific foundations and associated injury risks of early soccer specialisation

References

• Agricola, R., Bessems, J., Ginai, A., Heijboer, M. P., Van Der Heijden, R. A., Verhaar, J., … Waarsing, J. H. (2012). The development of cam-type deformity in adolescent and young male soccer players. The American Journal of Sports Medicine, 40, 1099–1106. doi:10.1177/0363546512438381
   PubMed Web of Science ®Google Scholar
• Agricola, R., Waarsing, J. H., Thomas, G. E., Carr, A. J., Reijman, M., Bierma-Zeinstra, S. M. A., … Arden, N. K. (2014). Cam impingement: Defining the presence of a cam deformity by the alpha angle: Data from the CHECK cohort and Chingford cohort. Osteoarthritis and Cartilage, 22, 218–225. doi:10.1016/j.joca.2013.11.007
   PubMed Web of Science ®Google Scholar
• Atkins, S., Bentley, I., Hurst, H., Sinclair, J., & Hesketh, C. (2016). The presence of bilateral imbalance of the lower limbs in elite youth soccer players of different ages. Journal of Strength & Conditioning Research, 30, 1007–1013.
   Google Scholar
• Baker, J., Cote, J., & Abernethy, B. (2003). Sport-specific practice and the development of expert decision-making in team ball sports. Journal of Applied Sport Psychology, 15, 12–25. doi:10.1080/10413200305400
   Web of Science ®Google Scholar
• Barynina, I. I., & Vaitsekhovskii, S. M. (1992). The aftermath of early sports specialization for highly qualified swimmers. Fitness and Sports Review International, 27, 132–133.
   Google Scholar
• Bell-Walker, J., & Williams, A. M. (2008). The effect of memory recall on perceptual–cognitive skill in elite soccer: Development of long term working memory. In T. Reilly, F. Korkusuz, & E. Ergen (Eds.), Science and football VI (pp. 340–343). London: Taylor & Francis.
   Google Scholar
• Bergeron, M. F., Mountjoy, M., Armstrong, N., Chia, M., Cote, J., Emery, C. A., … Engebretsen, L. (2015). International Olympic committee consensus statement on youth athletic development. British Journal of Sports Medicine, 49, 843–851. doi:10.1136/bjsports-2015-094962
   PubMed Web of Science ®Google Scholar
• Berry, J., Abernethy, B., & Côté, J. (2008). The contribution of structured activity and deliberate play to the development of expert perceptual and decision-making skill. Journal of Sport & Exercise Psychology, 30, 685–708.
   PubMed Web of Science ®Google Scholar
• Borms, J. (1986). The child and exercise: An overview. Journal of Sports Sciences, 4, 3–20. doi:10.1080/02640418608732093
   PubMed Web of Science ®Google Scholar
• Brink, M. S., Visscher, C., Arends, S., Zwerver, J., Post, W. J., & Lemmink, K. (2010). Monitoring stress and recovery: New insights for the prevention of injuries and illnesses in elite youth soccer players. British Journal of Sports Medicine, 44, 809–815. doi:10.1136/bjsm.2009.069476
   PubMed Web of Science ®Google Scholar
• Carlson, R. C. (1988). The socialization of elite tennis players in Sweden: An analysis of players’ backgrounds and development. Sociology of Sport Journal, 5, 241–256.
   Google Scholar
• Carter, C. W., & Micheli, L. J. (2011). Training the child athlete: Physical fitness, health and injury. British Journal of Sports Medicine, 45, 880–885. doi:10.1136/bjsports-2011-090201
   PubMed Web of Science ®Google Scholar
• Côté, J., Baker, J., & Abernethy, B. (2007). Practice and play in the development of sport expertise. In G. Tenenbaum & R. C. Eklund (Eds.), Handbook of sport psychology (pp. 184–202). New Jersey: John Wiley & Sons.
   Google Scholar
• Côté, J., Lidor, R., & Hackfort, D. (2009). ISSP position stand: To sample or to specialize? Seven postulates about youth sport activities that lead to continued participation and elite performance. International Journal of Sport and Exercise Psychology, 7, 7–17. doi:10.1080/1612197X.2009.9671889
   Google Scholar
• Crane, J., & Temple, V. (2015). A systematic review of dropout from organized sport among children and youth. European Physical Education Reviews, 21, 114–131.
   Web of Science ®Google Scholar
• Daneshjoo, A., Rahnama, N., Mokhtar, A. H., & Yusof, A. (2013). Bilateral and unilateral asymmetries of isokinetic strength and flexibility in male young professional soccer players. Journal of Human Kinetics, 36, 45–53. doi:10.2478/hukin-2013-0005
   PubMed Web of Science ®Google Scholar
• De Ste Croix, M., & Deighan, M. (2012). Dynamic knee stability during childhood. In M. De Ste Croix & T. Korf (Eds.), Paediatric biomechanics and motor control: Theory and application (pp. 233–258). Oxford, England: Routledge.
   Google Scholar
• DiFiori, J. P., Benjamin, H. J., Brenner, J., Gregory, A., Jayanthi, N., Landry, G. L., & Luke, A. (2014). Overuse injuries and burnout in youth sports: A position statement from the American Medical Society for Sports Medicine. Clinical Journal of Sport Medicine, 24, 3–20. doi:10.1097/JSM.0000000000000060
   PubMed Web of Science ®Google Scholar
• Elite Player Performance Plan. (2011). Document prepared by the English Premier League.
   Google Scholar
• Emery, C. A. (2003). Risk factors for injury in child and adolescent sport: A systematic review of the literature. Clinical Journal of Sport Medicine, 13, 256–268. doi:10.1097/00042752-200307000-00011
   PubMed Web of Science ®Google Scholar
• Emery, C. A., & Meeuwisse, W. (2010). The effectiveness of a neuromuscular prevention strategy to reduce injuries in youth soccer: A cluster-randomised controlled trial. British Journal of Sports Medicine, 44, 555–562. doi:10.1136/bjsm.2010.074377
   PubMed Web of Science ®Google Scholar
• Ericsson, K. A. (2013). Training history, deliberate practice and elite sports performance: An analysis in response to Tucker and Collins review - what makes champions? British Journal of Sports Medicine, 47, 533–535. doi:10.1136/bjsports-2012-091767
   PubMed Web of Science ®Google Scholar
• Ericsson, K. A., & Kintsch, W. (1995). Long-term working memory. Psychological Review, 102, 211–245. doi:10.1037/0033-295X.102.2.211
   PubMed Web of Science ®Google Scholar
• Ericsson, K. A., Krampe, R. T., & Tesch-Römer, C. (1993). The role of deliberate practice in the acquisition of expert performance. Psychological Review, 100, 363–406. doi:10.1037/0033-295X.100.3.363
   Web of Science ®Google Scholar
• Faigenbaum, A. D., Bush, J. A., McLoone, R. P., Kreckel, M. C., Farrell, A., Ratamess, N. A., & Kang, J. (2015). Benefits of strength and skill-based training during primary school physical education. Journal of Strength and Conditioning Research, 29, 1255–1262. doi:10.1519/JSC.0000000000000812
   PubMed Web of Science ®Google Scholar
• Faigenbaum, A. D., Lloyd, R. S., MacDonald, J., & Myer, G. D. (2015). Citius, Altius, Fortius: Beneficial effects of resistance training for young athletes. British Journal of Sports Medicine, 50(1), 3–7. doi:10.1136/bjsports-2015-094621
   Google Scholar
• Ferguson, M., & Patricios, J. (2014). What is the relationship between groin pain in athletes and femoroacetabular impingement? British Journal of Sports Medicine, 48, 1074–1075. doi:10.1136/bjsports-2014-093818
   PubMed Web of Science ®Google Scholar
• Ford, K. R., Shapiro, R., Myer, G. D., Van Den Bogert, A. J., & Hewett, T. E. (2010). Longitudinal sex differences during landing in knee abduction in young athletes. Medicine & Science in Sports & Exercise, 42, 1923–1931. doi:10.1249/MSS.0b013e3181dc99b1
   PubMed Web of Science ®Google Scholar
• Ford, P. R., Ward, P., Hodges, N., & Williams, A. M. (2009). The role of deliberate practice and play in career progression in sport: The early engagement hypothesis. High Ability Studies, 20, 65–75. doi:10.1080/13598130902860721
   Web of Science ®Google Scholar
• Fransen, J., Pion, J., Vandendriessche, J., Vandorpe, B., Vaeyens, R., Lenoir, M., & Philippaerts, M. (2012). Differences in physical fitness and gross motor coordination in boys aged 6–12 years specializing in one versus sampling more than one sport. Journal of Sports Sciences, 30, 379–386. doi:10.1080/02640414.2011.642808
   PubMed Web of Science ®Google Scholar
• Gabbett, T. J., & Ullah, S. (2012). Relationship between running loads and soft-tissue injury in elite team sport athletes. Journal of Strength and Conditioning Research, 26, 953–960. doi:10.1519/JSC.0b013e3182302023
   PubMed Web of Science ®Google Scholar
• Gladwell, M. (2008). Outliers: The story of success. New York, NY: Little, Brown.
   Google Scholar
• Gould, D., Udry, E., & Tuffey, S. (1996). Burnout in competitive junior tennis players: Pt. 1. A quantitative psychological assessment. Sport Psychologist, 10, 322–340.
   Web of Science ®Google Scholar
• Green, C. (2009). Every boy’s dream. London: A & C Black Publishers.
   Google Scholar
• Haugaasen, M., & Jordet, G. (2012). Developing football expertise: A football-specific research review. International Review of Sport and Exercise Psychology, 5, 177–201. doi:10.1080/1750984X.2012.677951
   Web of Science ®Google Scholar
• Haugaasen, M., Toering, T., & Jordet, G. (2014). From childhood to senior professional football: Elite youth players’ engagement in non-football activities. Journal Sports Science (Science and Medicine in Football Special Edition, 32, 1940–1949.
   Google Scholar
• Hejna, W. F., Rosenberg, A., Buturusis, D. J., & Krieger, A. (1982). The prevention of sports injuries in high school students through strength training. National Strength Coaches Association Journal, 4, 28–31. doi:10.1519/0199-610X(1982)004<0028:TPOSII>2.3.CO;2
   Google Scholar
• Helsen, W., Starkes, J. L., & Van Winckel, J. (1998). The influence of relative age on success and drop out in male soccer players. American Journal of Human Biology, 10, 791–798. doi:10.1002/(ISSN)1520-6300
   PubMed Web of Science ®Google Scholar
• Helsen, W. F., Starkes, J. L., & Van Winckel, J. (2000). Effect of a change in selection year on success in male soccer players. American Journal of Human Biology, 12, 729–735. doi:10.1002/(ISSN)1520-6300
   PubMed Web of Science ®Google Scholar
• Hewett, T. E., Myer, G. D., & Ford, K. R. (2004). Decreases in neuromuscular control about the knee with maturation in female athletes. The Journal of Bone and Joint Surgery American, 86, 1601–1608.
   PubMed Web of Science ®Google Scholar
• Hogan, K. A., & Gross, R. H. (2003). Overuse injuries in pediatric athletes. Orthopedic Clinics of North America, 34, 405–1. doi:10.1016/S0030-5898(03)00006-3
   PubMed Web of Science ®Google Scholar
• Hornig, M., Aust, F., & Güllich, A. (2014). Practice and play in the development of German top-level professional football players. European Journ Sport Sciences, 2, 1–10.
   Google Scholar
• Huijgen, B. C. H., Elferink-Gemser, M. T., Post, W. J., & Visscher, C. (2009). Soccer skill development in professionals. International Journal of Sports Medicine, 30, 585–591. doi:10.1055/s-0029-1202354
   PubMed Web of Science ®Google Scholar
• Jayanthi, N., Pinkham, C., Dugas, L., Patrick, B., & LaBella, C. (2013). Sports specialization in young athletes: Evidence-based recommendations. Sports Health: A Multidisciplinary Approach, 5, 251–257. doi:10.1177/1941738112464626
   Google Scholar
• Jayanthi, N. A., LaBella, C. R., Fischer, D., Pasulka, J., & Dugas, L. R. (2015). Sports-specialized intensive training and the risk of injury in young athletes: A clinical case-control study. The American Journal of Sports Medicine, 43, 794–801. doi:10.1177/0363546514567298
   PubMed Web of Science ®Google Scholar
• Johnson, A. C., Shaman, M. A., & Ryan, T. G. (2012). Femoroacetabular impingement in former high-level youth soccer players. The American Journal of Sports Medicine, 40, 1342–1346. doi:10.1177/0363546512439287
   PubMed Web of Science ®Google Scholar
• Junge, A., & Dvorak, J. (2000). Influence of definition and data collection on the incidence of injuries in football. The American Journal of Sports Medicine, 28, 40–46. doi:10.1177/28.suppl_5.S-40
   PubMed Web of Science ®Google Scholar
• Koslowsky, M., & Botelho, M. D. C. (2010). Domains in the practice of the football learning: Comparative study among football athletes of junior category in Portugal and Brazil. Journal of Human Sport and Exercise, 5, 400–410. doi:10.4100/jhse
   Google Scholar
• Leite, N., Baker, J., & Sampiao, J. (2009). Paths to expertise in the Portugese national team athletes. Journal of Sports Science & Medicine, 8, 560–566.
   PubMed Web of Science ®Google Scholar
• Lephart, S. M., Riemann, B. L., & Fu, F. H. (2000). Introduction to the sensorimotor system. In S. M. Lephart & F. H. Fu (Eds.), Proprioception and neuromuscular control in joint stability. Champaign, IL: Human Kinetics.
   Google Scholar
• Lidor, R., & Lavyan, Z. (2002). A retrospective picture of early sport experiences among elite and near-elite Israeli athletes: Developmental and psychological perspectives. International Journal of Sport Psychology, 33, 269–289.
   Web of Science ®Google Scholar
• Lloyd, R. S., & Oliver, J. L. (2012). The youth physical development model: A new approach to long-term athletic development. Strength and Conditioning Journal, 34, 61–72. doi:10.1519/SSC.0b013e31825760ea
   Web of Science ®Google Scholar
• Lloyd, R. S., Oliver, J. L., Faigenbaum, A. D., Myer, G. D., & De Ste Croix, M. B. A. (2014). Chronological age vs. biological maturation: Implications for exercise programming in youth. Journal of Strength and Conditioning Research, 28, 1454–1464. doi:10.1519/JSC.0000000000000391
   PubMed Web of Science ®Google Scholar
• Malina, R. M. (2010). Early sport specialization: Roots, effectiveness, risks. Current Sports Medicine Reports, 9, 364–371. doi:10.1249/JSR.0b013e3181fe3166
   PubMed Web of Science ®Google Scholar
• Malina, R. M., Eisenmann, J. C., Cumming, S. P., Ribeiro, B., & Aroso, J. (2004). Maturity-associated variation in the growth and functional capacities of youth football (soccer) players 13-15 years. European Journal of Applied Physiology, 91, 555–562. doi:10.1007/s00421-003-0995-z
   PubMed Web of Science ®Google Scholar
• Malina, R. M., Peña Reyesa, M. E., Eisenmanna, J. C., Hortab, L., Rodriguesc, J., & Miller, R. (2000). Height, mass and skeletal maturity of elite Portuguese soccer players aged 11–16 years. Journal of Sports Sciences, 18, 685–693. doi:10.1080/02640410050120069
   PubMed Web of Science ®Google Scholar
• Matos, N. F., Winsley, R. J., & Williams, C. A. (2011). Prevalence of non-functional overreaching/overtraining in young English athletes. Medicine & Science in Sports & Exercise, 43, 1287–1294. doi:10.1249/MSS.0b013e318207f87b
   PubMed Web of Science ®Google Scholar
• Michaud, P. A., Renaud, A., & Narring, F. (2001). Sports activities related to injuries? A survey among 9-19 year olds in Switzerland. Injury Prevention, 7, 41–45. doi:10.1136/ip.7.1.41
   PubMedGoogle Scholar
• Micheli, L., & Natsis, K. I. (2013). Preventing injuries in team sports: What the team physician needs to know. In L. J. Micheli, F. Pigozzi, K. M. Chan, W. R. Frontera, N. Bachl, A. D. Smith, & T. Alenabi (Eds.), F.I.M.S. Team physician manual (3rd ed., pp. 505–520). London: Routledge.
   Google Scholar
• Moesch, K., Elbe, A.-M., Hauge, M.-L. T., & Wikman, J. M. (2011). Late specialization: The key to success in centimeters, grams, or seconds (cgs) sports. Scandinavian Journal of Medicine & Science in Sports, 21, e282–e290. doi:10.1111/j.1600-0838.2010.01280.x
   PubMed Web of Science ®Google Scholar
• Myer, G. D., Faigenbaum, A. D., Ford, K. R., Best, T. M., Bergeron, M. F., & Hewett, T. E. (2011). When to initiate integrative neuromuscular training to reduce sports-related injuries and enhance health in youth? Current Sports Medicine Reports, 10, 155–166. doi:10.1249/JSR.0b013e31821b1442
   PubMed Web of Science ®Google Scholar
• Price, R. J., Hawkins, R. D., Hulse, M. A., & Hodson, A. (2004). The football association and medical research programme: An audit of injuries in academy youth football. British Journal of Sports Medicine, 38, 466–471. doi:10.1136/bjsm.2003.005165
   PubMed Web of Science ®Google Scholar
• Rose, M. S., Emery, C. A., & Meeuwisse, W. H. (2008). Sociodemographic predictors of sport injury in adolescents. Medicine & Science in Sports & Exercise, 40, 444–450. doi:10.1249/MSS.0b013e31815ce61a
   PubMed Web of Science ®Google Scholar
• Rumpf, M., & Cronin, J. (2012). Injury incidence, body site, and severity in soccer players aged 6–18 years: Implications for injury prevention. Strength and Conditioning Journal, 34, 20–31. doi:10.1519/SSC.0b013e31821a9833
   Web of Science ®Google Scholar
• Serrano, J. M. P. R., Santos, S. D. L. D., Sampaio, A. J. E., & Leite, N. M. C. (2013). Iniciação desportiva, actividades prévias e especialização no treino de futsal em Portugal. Motriz: Revista De Educação Física [Online], 19(1), 99–113. [cited March 10, 2015].
   Google Scholar
• Soberlak, P., & Cote, J. (2003). The developmental activities of elite ice hockey players. Journal of Applied Sport Psychology, 15, 41–49. doi:10.1080/10413200305401
   Web of Science ®Google Scholar
• Soligard, T., Myklebust, G., Steffen, K., Holme, I., Silvers, H., Bizzini, M., … Andersen, T. E. (2008). Comprehensive warm-up programme to prevent injuries in young female footballers: Cluster randomised controlled trial. Bmj, 337, a2469. doi:10.1136/bmj.a2469
   PubMed Web of Science ®Google Scholar
• Stein, C. J., & Micheli, L. J. (2010). Overuse injuries in youth sports. The Physician and Sportsmedicine, 38, 102–108. doi:10.3810/psm.2010.06.1787
   PubMed Web of Science ®Google Scholar
• Tak, I., Weir, A., Langhout, R., Waarsing, J., Stubbe, J., Kerkhoffs, G., & Agricola, R. (2015). The relationship between the frequency of football practice during skeletal growth and the presence of a cam deformity in adult elite football players. British Journal of Sports Medicine, 49, 630–634. doi:10.1136/bjsports-2014-094130
   PubMed Web of Science ®Google Scholar
• Vaeyens, R., Güllich, A., Warr, C. R., & Philippaerts, R. (2009). Talent identification and promotion programmes of olympic athletes. Journal of Sports Sciences, 27, 1367–1380. doi:10.1080/02640410903110974
   PubMed Web of Science ®Google Scholar
• van der Sluis, A., Elferink-Gemser, M. T., Coelho-e-Sliva, M. J., Nijboer, J. A., Brink, M. S., & Visscher, C. (2014). Sports injuries aligned to peak height velocity in talented pubertal soccer players. International Journal of Sports Medicine, 35, 351–355.
   PubMed Web of Science ®Google Scholar
• Wall, M., & Côté, J. (2007). Developmental activities that lead to dropout and investment in sport. Physical Education & Sport Pedagogy, 12, 77–87. doi:10.1080/17408980601060358
   Google Scholar
• Ward, P., Hodges, N. J., Starkes, J. L., & Williams, M. A. (2007). The road to excellence: Deliberate practice and the development of expertise. High Ability Studies, 18, 119–153. doi:10.1080/13598130701709715
   Web of Science ®Google Scholar
• Williams, C. A., Wood, L., & De Ste Croix, M. (2012). Growth and maturation in childhood. In M. De Ste Croix & T. Korff (Eds.), Paediatric biomechanics and motor control: Theory and application (pp. 15–17). Abingdon, UK: Routledge.
   Google Scholar
• Xu, L., Nicholson, P., Wang, Q., Alén, M., & Cheng, S. (2009). Bone and muscle development during puberty in girls: A seven-year longitudinal study. Journal of Bone and Mineral Research, 24, 1693–1698. doi:10.1359/jbmr.090405
   PubMed Web of Science ®Google Scholar
• Zazulak, B. T., Hewett, T. E., Reeves, N. P., Goldberg, B., & Cholewicki, J. (2007). Deficits in neuromuscular control of the trunk predict knee injury risk: A prospective biomechanical-epidemiologic study. The American Journal of Sports Medicine, 35, 1123–1130. doi:10.1177/0363546507301585
   PubMed Web of Science ®Google Scholar
• Zinberg, M., & Conzelmann, A. (2012). The role of specialization in the promotion of young football talents: A person-oriented study. European Journal of Sport Science, 13, 452–460.
   PubMed Web of Science ®Google Scholar