López Sánchez, Guillermo Felipe, Arturo Díaz-Suárez, Łukasz Radzimiński, and Zbigniew Jastrzębski. 2017. “Effects of a 12-Week-Long Program of Vigorous-Intensity Physical Activity on the Body Composition of 10-and 11-Year-Old Children”. Journal of Human Sport and Exercise 12 (1):236-45. https://doi.org/10.14198/jhse.2017.121.19.