“…white (Williams et al, 2017), Spanish (Blanco et al, 2019), Australian (Fraysse et al, 2019), Latino (Lebron et al, 2018), Saudi Arabian (Alharbi, 2019), American (Haidar et al, 2019), Scandinavian (Niemistö et al, 2020)-shows a relationship between physical activity at different periods of life and the development of different problems associated with body mass (Niemistö et al, 2020), including being overweight and/or obese, parents' BMI (Williams et al, 2017), specifics of parental attitudes and behaviors with regards to nutrition (Williams et al, 2017;Lebron et al, 2018;Alharbi, 2019), as well as a relationship between physical activity and the development of cognitive functions in children and adolescents (Bidzan-Bluma & Lipowska, 2018). In the studies of Williams et al, 2017, Lebron et al, 2018and Alharbi et al, 2019 between the physical activity of children and adolescents and other variables were measured using various indices collected using questionnaires, scales, and surveys completed by parents (questions targeted at both parents concerned BMI, diet, and time spent doing physical activity and being sedentary throughout the day). Fraysse et al, 2019, used the moderate to vigorous physical activity index (MVPA) to measure the relationship between the physical activity of children and their parents in a healthy population of 1261 Australian children (50% boys and 50% girls) and 1358 parents (88% mothers).…”