“…Thus, the effectiveness of fitness programs in the system of improving the health of schoolchildren is investigated (Andrieieva et al, 2021;Ivanyshyn et al, 2021;Savliuk et al, 2020), gender differences that must be taken into account in the process of their physical education are studied (Berezhna, 2013;Dudko et al, 2017;Futorny et al, 2016), the health-improving effect of various kinds of sports on their morphofunctional state is evaluated (Barbry et al, 2022;Goncharova et al, 2022;Madsen et al, 2022), etc. Swimming takes one of the leading places among the leaders of the favorable influence on a child's body during sports training (Sakhnovsky, 1995;Lyashenko et al, 2012). It is concerned as an effective means of developing water skills, overcoming fear of water, strengthening health, and increasing the adaptation capabilities of their body (Button, 2016;Peden et al, 2020;Tian, 2023). In addition, the positive motivation of junior pupils to health-improving swimming classes has been proven (Grashchenkova, 2015;Madsen et al, 2022).…”