Urtnowska, K., Bułatowicz, I., Radzimińska, A., Woźniak, M., Wiśniewski, J., & Zukow, W. (2015). Physiological changes in the locomotor system of a pregnant and related lumbar-sacral pain - examination of the degree of feeling back pain during properly running pregnancy. Journal of Education, Health and Sport, 5(7), 105–116. Retrieved from https://apcz.umk.pl/JEHS/article/view/2776