[Alter M.J. (2004) Science of Flexibility (3rd ed.). Human Kinetics, Champaign IL.]Search in Google Scholar
[American Academy of Pediatrics. Committee on Sports Medicine and Fitness (2001) Strength training by children and adolescents. Pediatrics 107:147-1472.10.1542/peds.107.6.147011389279]Search in Google Scholar
[American College of Sports Medicine (1995) ACSM's Guidelines for Exercise Testing and Prescription (5th ed.). Lippincott, Williams and Wilkins, Baltimore.]Search in Google Scholar
[Baquet G, J.W.Twisk, H.C.Kemper, E.Van Praagh, S.Berthoin (2006). Longitudinal follow-up of fitness during childhood: interaction with physical activity. Am.J.Hum.Biol. 18:51-58.]Search in Google Scholar
[Beedle B., C.Jesse, M.H.Stone (1991) Flexibility characteristics among athletes who weight train. J.Appl.Sport Sci.Res. 5:150-154.]Search in Google Scholar
[Boraczyński T., L.B.Boraczyńska, J.Urniaż (2009) The influence of physical activity on body composition and the level of student's flexibility. Medicina Sportiva 13:13-16.10.2478/v10036-009-0003-8]Search in Google Scholar
[Buckup K. (1998) Testy kliniczne w badaniu kości, stawów i mięśni. PZWL, Warszawa.]Search in Google Scholar
[Christou M., I.Smilios, K.Sotiropoulos, K.Volaklis, T.Pillanidis, S.Tokmakidis (2006). Effects of resistance training on the physical capacities of adolescent soccer players. J.Strength Cond.Res. 20:783-791.]Search in Google Scholar
[Erceg M., N.Zagorac, R.Katić (2008) The impact of football training on motor development in male children. Coll Antropol. 32:241-247.]Search in Google Scholar
[Grabara M. (2008) Spine flexibility and the prevalence of the increased stiffness of shoulders and hip joint in youth female and male handball players. Medycyna Sportowa 176: 304-310.]Search in Google Scholar
[Grabara M., A.Banaszczak (2007) The flexibility of the spine and muscle contractures in shoulders and hip joints of young female and male basketball players. (Engl. abstr). In: Nabór i Selekcja oraz Szkolenie Dzieci i Młodzieży w Zakresie Gier Sportowych. Międzynarodowe Towarzystwo Gier Sportowych, Wrocław, Monografia 9, pp. 39-44.]Search in Google Scholar
[Jankowicz-Szymańska A., M.Imiołek (2008) Spine mobility and the quality of body posture in 11-year old handball players compared to their peers. Medycyna Sportowa 176:293-303.]Search in Google Scholar
[National Strength and Conditioning Association (1996) Youth resistance training. Position statement paper and literature review. Strength Cond.J. 18:62-75.]Search in Google Scholar
[Schmid M., M.Romann, S.Kriemler, L.Zahner (2007). How can the physical fitness of schoolchildren be measured? Schweizerische Zeitschrift für Sportmedizin & Sporttraumatologie 55:52-61.]Search in Google Scholar
[Thrash K., B.Kelly (1987). Flexibility and strength training. J.Appl.Sport Sci.Res. 1:74-75.]Search in Google Scholar
[Zembaty A. (2002) Kinezyterapia (Vol. 1) Kasper, Kraków.]Search in Google Scholar