Bąk, Robert2015-02-102015-02-102013-03-01Bąk R: Definition of extreme physical activity determined through the Delphi method. Arch Budo Sci Martial Art Extreme Sport. 2013; 9: 17-222300-8822http://repozytorium.ur.edu.pl/handle/item/810engUznanie autorstwa-Użycie niekomercyjne-Bez utworów zależnych 3.0 Polskahttp://creativecommons.org/licenses/by-nc-nd/3.0/pl/extraspection methodextreme sportintrospection methodresearch methodologysport sciencesDefinition of extreme physical activity determined through the Delphi methodarticle