Kucharczuk-Kopycińska M, Krajewski S, Krajewska M. Assessment and affects hamstrings contracture on the formation of posture defects in children of preschool age. J Educ Health Sport [Internet]. 2016 Dec. 31 [cited 2025 Feb. 27];6(13):135-4. Available from: https://apcz.umk.pl/JEHS/article/view/4165