Zawadka, Magdalena, Piotr Gawda, Maria Skublewska-Paszkowska, Jakub Smołka, and Edyta Łukasik. 2017. “Physical Activity Level and Mobility of Hip, Pelvic and Spine in Sagittal Plane During Forward Bending”. Journal of Education, Health and Sport 7 (8):114-23. https://apcz.umk.pl/JEHS/article/view/4703.