“…The results of previous studies indicate negative trends in the physical fitness of schoolchildren (Núñez-Quiroga et al, 2018;Fu et al, 2019;Masanovic et al, 2020;Fühner et al, 2021;Oñate Navarrete et al, 2021;Jiang et al, 2021); unwillingness of the majority of schoolchildren to engage in physical culture and sports on a systematic basis (Rodriguez-Ayllon et al, 2019;Goh et al, 2019;Andermo et al, 2020). For example, Guthold et al, 2020 Great attention in the context of our research was paid to works where the role of general developing exercises in primary school is investigated (Taylor et al, 2018;Watson et al, 2019;Cañas Encinas et al, 2021); theoretical views on the use of means for physical education in educationaleducative activities (Chanal et al, 2019;Ledezma, 2019;Quennerstedt, 2019;Masini et al, 2020;Gómez-Álvarez et al, 2021;Thorjussen, 2021;Wassenaar et al, 2021).…”