Objective. Development of guidelines of healthy physical activity volume for school-age children of the quarantine measures

Materials and methods. Results of a survey of physical activity (PA) and mental health of children and adolescents of school age (n=1354) were included in the study. Anthropometrical-physiological parameters and the level of well-being were determined in 39 children of primary school age. The optimal duration and frequency of various PA for different age and gender groups was determined by constructing linear regression models. Statistical analysis was carried out using STATISTICA 8.0.

Results and discussion. Increased physical activity significantly reduces depression (r=– 0,25; p<0,001) and anxiety levels (r=– 0,14; p<0,001). Also the relationship between the duration of MVPA and anxiety indicators (r=–0.10; p<0.001) and depression indicators (r=–0,22; p<0,001) was determined. The recommended duration of the total PA (PAt, more than 2 hours a day) was observed during the quarantine by 42.5±2.4% of students of the younger age group, 36.6±2.3% of students of the middle age group and 33.3±2.3% high school students.
It is determined that the chances having the middle and high levels of well-being are 8 times higher in the group of children who have PAt more 2 hours/day during the quarantine (OR = 8,0; CІ 1,54-41,63) and are 8,2 times higher - who have MVPA more 60 minute/day (OR = 8,17; CІ 1,41-47,22). The indicator of the total duration of physical activity was normalized according to the maximum value of the indicator for each age group and gender to check the developed standards.

Conclusions. It is determined that the daily duration PAt for school-age children during the quarantine measures for the purpose of prevention depression disorders should be more 2 hours/day for primary school children and 2.2 hours/day for adolescents.
The favorable for mental health minimal duration of MVPA, which is typical of most sports, for primary school children is amount 60 minutes/day for boys and 40 minutes/day for girls, for adolescents is 60 minutes/day for boys and 45 minutes/day for girls.
The daily duration of MVPA for preventing of depressive disorders of primary school children is about 40 minutes/day for girls and about 60 minutes/day for boys. For preventing of anxiety disorders of primary school children is about 40 minutes/day for girls and about 50 minutes/day for boys, respectively. A single health-enhancing duration of sporting activity is 1,2-1,5 hours for primary school children and 1,5-2,0 hours for adolescents.

physical activity, mental health, school-age children, mathematical models, moderate-to-vigorous physical activity

1. Alves J.G.B. and Alves G.V. Effects of Physical Activity on Children's Growth. J Pediatr (Rio J). 2019 ; 95 (1) : 72-78. DOI : https://doi.org/10.1016/j.jped.2018.11.003

2. Anderson E. and Durstine J.L. Physical Activity, Exercise, and Chronic Diseases: A Brief Review. Sports Medicine and Health Science. 2019 ; 1 (1) : 3-10. DOI : http://doi.org/10.1016/j.smhs.2019.08.006

3. Yelizarova O., Stankevych T., Parats A., Polka N., Lynchak O., Diuba N. and Hozak S. The Effect of Two COVID-19 Lockdowns on Physical Activity of School-Age Children. Sports Med Health Sci. 2022 ; 4(2) : 119-126. DOI : http://doi.org/10.1016/j.smhs.2022.01.002

4. Bull F.C., Al-Ansari S.S., Biddle S., Borodulin K., Buman M.P., Cardon G. et al. World Health Organization 2020 Guidelines on Physical Activity and Sedentary Behaviour. Br J Sports Med. 2020 ; 54(24) : 1451-1462. DOI : http://doi.org/10.1136/bjsports-2020-102955

5. Yelizarova O., Hozak S., Stankevych T. and Parats A Rivni ozdorovchoi rukhovoi aktyvnosti dlia ditei molodshoho shkilnoho viku: systemnyi ohliad aktualnykh doslidzhen [Levels of Health Physical Activity of Primary School Children: A Systematic Review of Current Research]. Aktualni problemy suchasnoi medytsyny. 2021 ; 7 : 30-43. DOI : http://doi.org/10.26565/2617-409X-2021-7-04

6. Hozak S., Yelizarova O., Antomonov M.Yu., Stankevych T. and Parats A. Zviazok rivnia rukhovoi aktyvnosti ditei i pidlitkiv z pokaznykamy zdorovia [The Relationship between the Level of Physical Activity of Children and Adolescents and Health Indicators]. In : Hihiiena naselenykh mists [Hygiene of Populated Places]. Kyiv ; 2021. ; 71 : 177-187 (in Ukrainian). DOI : https://doi.org/10.32402/hygiene2021.71.177

7. Loades M.E., Chatburn E., Higson-Sweeney N. et al. Rapid Systematic Review: The Impact of Social Isolation and Loneliness on the Mental Health of Children and Adolescents in the Context of COVID-19. J Am Acad Child Adolesc Psychiatry. 2020 ; 59(11) :1218-1239.e3. DOI : http://doi.org/10.1016/j.jaac.2020.05.009.

8. Lуpez-Bueno R., Lуpez-Sбnchez G.F., Casajъs J.A. et al. Potential Health-Related Behaviors for Pre-School and School-Aged Children During COVID-19 Lockdown: A Narrative Review. Prev Med. 2021 ;143 : 106349. DOI : http://doi.org/10.1016/j.ypmed.2020.106349

9. Bu F., Bone J.K., Mitchell J.J., Steptoe A. and Fancourt D. Longitudinal Changes in Physical Activity During and After the First National Lockdown Due to the COVID-19 Pandemic in England. Sci Rep. 2021 ; 11(1 : 17723. DOI : http://doi.org/10.1038/s41598-021-97065-1

10. Schmidt S.C.E., Anedda B., Burchartz A., Eichsteller A., Kolb S., Nigg C. et al. Physical Activity and Screen Time of Children And Adolescents Before And During The COVID-19 Lockdown In Germany: A Natural Experiment. Sci Rep. 2020 ; 10 : 21780. DOI : http://doi.org/10.1038/s41598-020-78438-4

11. Dvorsky M.R., Breaux R. and Becker S.P. Finding Ordinary Magic in Extraordinary Times: Child and Adolescent Resilience during the COVID-19 Pandemic. Eur Child Adolesc Psychiatry. 2021 ; 30(11) : 1829-1831. DOI : http://doi.org/10.1007/s00787-020-01583-8

12. Andrieieva O., Blystiv T., Byshevets N., Moseychuk Y., Balatska L. et al. Assessment of the Impact of Outdoor Activities at Leisure Facilities. Journal of Physical Education and Sport (JPES). 2022 ; 22 (iss. 8) ; # 231 : 1839 – 1847. DOI : http://doi.org/10.7752/jpes.2022.08231

13. Ebesutani C., Korathu-Larson P., Nakamura B.J., Higa-McMillan C. and Chorpita B. The Revised Child Anxiety and Depression Scale 25-Parent Version: Scale Development and Validation in a School-Based and Clinical Sample. Assessment. 2017 ; 24(6) : 712-728. DOI : http://doi.org/10.1177/1073191115627012

14. Polka N.S. and Hozak S.V. (eds.). Rozumova pratsezdatnist, navchalne navantazhennia ta sposib zhyttia suchasnykh shkoliariv: hihiienichni aspekty [Mental Capacity, Academic Load and Lifestyle of Modern Schoolchildren: Hygienic Aspects]. Kyiv : Medinform ; 2018 : 214 p. (in Ukrainian).

15. Hozak S.V., Yelizarova O.T., Stankevych T.V. and Parats A.M. Metodyka vyznachennia samopochuttia uchniv zakladiv serednoi osvity : Svidotstvo № 83786 vid 18.12.2018r. pro reiestratsiiu avtorskoho prava na naukovyi tvir [Methods of Determining the Well-Being of Students of Secondary Education Institutions: Certificate No. 83786 dated 18.12.2018. on registration of copyright for a scientific work]. (in Ukrainian).