1. Mirwald RL, Baxter-Jones AD, Bailey DA, et al. An assessment of maturity from anthropometric measurements. Med Sci Sports Exerc. 2002;34(4):689-94.##
2. Kozieł SM, Malina RM. Modified maturity offset prediction equations: Validation in independent longitudinal samples of boys and girls. Sports Med. 2018;48(1):221-36. ##
3. Malina RM, Bouchard C, Bar-Or O. Growth, maturation, and physical activity: Human kinetics; 2004. ##
4. Malina RM, Ribeiro B, Aroso J, et al. Characteristics of youth soccer players 13-15 years classified by skill level. Br J Sports Med. 2007. ##
5. Gastin PB, Bennett G, Cook J. Biological maturity influences running performance in junior Australian football. J Sci Med Sport. 2013;16(2):140-5. ##
6. Ayers SF, Sariscsany MJ. Physical education for lifelong fitness: the physical best teacher's guide: Human Kinetics; 2011. ##
7. Nagarwal A, Zutshi K, Ram C, et al. Improvement of hamstring flexibility: A comparison between two PNF stretching techniques. International journal of sports science and engineering. 2010;4(1):25-33. ##
8. Martins R, Abade E, Viana JL, et al. The influence of height on a 10 week flexibility program applied in physical education classes. Journal of Sport Pedagogy and Research. 2017;3(2):27-31. ##
9. Feldman D, Shrier I, Rossignol M, et al. Adolescent growth is not associated with changes in flexibility. Clinical journal of sport medicine: official journal of the Canadian Academy of Sport Medicine. 1999;9(1):24-9. ##
10. Lamari N, Marino LC, Cordeiro JA, et al. Trunk anterior flexibility in adolescents after height growth speed peak. Acta Ortopedica Brasileira. 2007;15(1):25-9. ##
11. Youdas JW, Krause DA, Hollman JH, et al. The influence of gender and age on hamstring muscle length in healthy adults. Journal of Orthopaedic & Sports Physical Therapy. 2005;35(4):246-52. ##
12. Rodríguez P, Santonja F, López-Miñarro P, et al. Effect of physical education stretching programme on sit-and-reach score in schoolchildren. Science & Sports. 2008;23(3-4):170-5. ##
13. Ramos Espada D, González Montesinos J, Mora Vicente J. Evolution of the articular range in primary and secondary school. Rev Int Med Cienc Act Fís Deporte. 2007;7(26):144-57. ##
14. Lloyd RS, Oliver JL, Radnor JM, et al. Relationships between functional movement screen scores, maturation and physical performance in young soccer players. J Sports Sci. 2015;33(1):11-9. ##
15. Lacy AC, Williams SM. Measurement and evaluation in physical education and exercise science: Routledge; 2018. ##
16. Gabbe BJ, Bennell KL, Wajswelner H, et al. Reliability of common lower extremity musculoskeletal screening tests. Physical Therapy in Sport. 2004;5(2):90-7. ##
17. Konor MM, Morton S, Eckerson JM, et al. Reliability of three measures of ankle dorsiflexion range of motion. International journal of sports physical therapy. 2012;7(3):279. ##
18. Valdivia OD, Ortega FZ, Rodríguez JJA, et al. Changes in flexibility according to gender and educational stage. Apunts: Medicina de l'esport. 2009;44(161):10-7. ##
19. Brodersen A, Pedersen B, Reimers J. Incidence of complaints about heel-, knee-and back-related discomfort among Danish children, possible relation to short muscles. Ugeskrift for laeger. 1994;156(15):2243-5. ##
20. Harreby M, Nygaard B, Jessen T, et al. Risk factors for low back pain in a cohort of 1389 Danish school children: an epidemiologic study. European Spine Journal. 1999;8(6):444-50. ##
21. Wahlstedt C, Rasmussen-Barr E. Anterior cruciate ligament injury and ankle dorsiflexion. Knee Surgery, Sports Traumatology, Arthroscopy. 2015;23(11):3202-7. ##