Is the Special Judo Fitness Test Index discriminative during formative stages? : Age and competitive level differences in U13 and U15 children

Ido Movement for Culture : journal of martial arts anthropology : theory of culture, psychophysical culture, cultural tourism, anthropology of martial arts, combat sports, Tom 18, Numer 3 (2018) s. 37-41
Javier Courel-Ibnez, Emerson Franchini, Raquel Escobar-Molina