The evaluation of Ju-jitsu trainees’ physical fitness depending on the utilization of acrobatic and agility exercises in training

Security Dimensions. International & National Studies, Numer 1 (13) (2015) s. 108-116
Tadeusz Ambroży, Maciej Kukuła, Dorota Ambroży, Patrycja Kawa, Dariusz Mucha