Pryimakov O, Prysiazhniuk S, Korobeynikov G, Oleniev D, Polyvaniuk V, Mazurok N, Omelchuk O. Improvement of students’ physical fitness in physical education classes using CrossFit means. Physical Education of Students. 2023;27(2):71-8. https://doi.org/10.15561/20755279.2023.0203