Baker, E.H. (2014). Socioeconomic Status, Definition. In W.C. Cockerham, R. Dingwall and S. Quah (Eds.), The Wiley Blackwell Encyclopedia of Health, Illness, Behavior, and Society. https://doi.org/10.1002/9781118410868.wbehibs395
Badicu, G., Campa, F. (Eds.) (2021). Physical Activity and Sports Practice in Improving Body Composition and Sustainable Health. Sustainability, https://doi.org/10.3390/books978-3-0365-0599-2
Bauer, K. W., Nelson, M. C., Boutelle, K. N., Neumark-Sztainer, D. (2008). Parental influences on adolescents‘ physical activity and sedentary behavior: longitudinal findings from Project EAT-II. International Journal of Behavioral Nutrition and Physical Activity, 5(1), https://doi.org/10.1186/1479-5868-5-12
Beets, M.W., Cardinal, B. J., Alderman, B. L., (2010), Parental social support and the physical activity-related behaviors of youth: A review, Health Education & Behavior, 37(5): 621-644, https://doi.org/10.1177/1090198110363884
Bronikowska, M., Krzysztoszek, J., Łopatka, M., Ludwiczak, M., Pluta, B. (2021). Comparison of Physical Activity Levels in Youths before and during a pandemic lockdown. International Journal of Environmental Research and Public Health, 18, 5139. https://doi.org/10.3390/ijerph18105139
Canty-Mitchell, J., Zimet, G. (2000). Psychometric properties of the Multidimensional Scale of Perceived Social Support in urban adolescents. American Journal of Community Psychology, 28(3), 391-400. https://doi.org/10.1023/A:1005109522457
Caputo, E., Reichert, F. (2020). Studies of Physical Activity and COVID-19 During the Pandemic: A Scoping Review. Journal of Physical Activity and Health, 17(12), 1275-1284. https://doi.org/10.1123/jpah.2020-0406
Cheatom, O. (2014), Parental Influence on Children’s Physical Activity Motivation, Department of Family Social Science, The University of Minnesota, https://reachfamilies.umn.edu/sites/default/files/rdoc/Parental%20Influence%20on%20Children%27s%20Physical%20Activity%20Motivation.pdf
Chen, P., Ma, L., Nassis, G.P., Harmer, P., Ainsworth, B.E., Li, F. (2020). Coronavirus disease (COVID-19): The need to maintain regular physical activity while taking precautions. Journal of Sport Health Sciences, 9, 103-104. https://doi.org/10.1016/j.jshs.2020.02.001
Cheng, S., Chan, A. (2004). The multidimensional scale of perceived social support: dimensionality and age and gender in adolescents. Personality and Individual Differences, 37(7), 1359-1369. https://doi.org/10.1016/j.paid.2004.01.006
Cole, T., Lobstein, T. (2012). Extended international (IOTF) body mass index cut-offs for thinness, overweight and obesity. Pediatric Obesity, 7, 284-294. https://doi.org/10.1111/j.2047-6310.2012.00064.x
Crawford, D., Jackson, E., Godbey, G. (1991). A hierarchical model of leisure constraints. Leisure Sciences, 13(4), 309-320. https://doi.org/10.1080/01490409109513147
Currie, C., Molcho, M., Boyce, W., Holstein, B., Torbjørn, T., Richter, M. (2008). Researching health inequalities in adolescents: The development of the Health Behaviour in School-Aged Children (HBSC) Family Affluence Scale. Social Science & Medicine, 66(6), 1429-1436. https://doi.org/ 10.1016/j.socscimed.2007.11.024
Davison, K.K., Jago, R. (2009). Change in parent and peer support across ages 9 to 15 year and adolescent girls’ physical activity. Medicine and Science in Sports and Exercise, 41, 1816-1825. https://doi.org/10.1249/MSS.0b013e3181a278e2
Drygas, W., Zdrojewska, M., Gajewski, T. (2021). Niedostateczny poziom aktywności fizycznej w Polsce jako zagrożenie i wyzwanie dla zdrowia publicznego – raport Komitetu Zdrowia Publicznego Polskiej Akademii Nauk, Narodowy Instytut Zdrowia Publicznego – Państwowy Zakład Higieny. https://gumed.edu.pl/attachment/attachment/75626/Monografia_aktywnosc_fizyczna.pdf
Dumith, S.C., Gigante, D.P., Domingues, M.R., Kohl, H.W. (2011). Physical activity change during adolescence: A systematic review and a pooled analysis. International Journal of Epidemiology, 40, 685-698. https://doi.org/ 10.1093/ije/dyq272
Edwardson, C. L., Gorely, T. (2010). Parental influences on different types and intensities of physical activity in youth: A systematic review. Psychology of Sport and Exercise, 11(6), 522-535. https://doi.org/10.1016/j.psychsport.2010.05.001
Erkelenz, N., Schreiber, A. C., Kobel, S., Kettner, S., Drenowatz, C., Steinacker, J. M. (2014). Relationship of parental health-related behaviours and physical fitness in girls and boys. Journal of Public Health, 22(5), 407-414. https://doi.org/10.1007/s10389-014-0636-5
Exel, J., Mateus, N., Travassos, B., Gonçalves, B., Gomes, I., Leite, N., Sampaio, J. (2018). Off-training levels of physical activity and sedentary behavior in young athletes: Preliminary results during a typical week. Sports, 6(4), 141. https://doi.org/10.3390/sports6040141
Fleming, K., Cavanagh, F. (2012). Encouraging leisure-time physical activity (LTPA) participation in children and youth: the use of strength training programmes to improve health. African Journal for Physical Health Education, Recreation and Dance, 18(4). https://doi.org/10520/EJC135182
Griffith, J. R., Clasey, J. L., King, J. T., Gantz, S., Kryscio, R. J., Bada, H. S., (2007). Role of parents in determining children’s physical activity. World Journal of Paediatrics, 3(4), 265-270
Hudson, G., Sprow, K. (2020). Promoting Physical Activity During the COVID-19 Pandemic: Implications for Obesity and Chronic Disease Management. Journal of Physical Activity and Health, 17(7), 685-687. https://doi.org/10.1123/jpah.2020-0318
Lippi, G., Henry, B. M., Sanchis-Gomar, F. (2020). Physical inactivity and cardiovascular disease at the time of coronavirus disease 2019 (COVID-19). European Journal of Preventive Cardiology, 27(9), 906-908. https://doi.org/10.1177/2047487320916823
López-Bueno, R., Calatayud, J., Ezzatvar, Y. (2020). Association Between Current Physical Activity and Current Perceived Anxiety and Mood in the Initial Phase of COVID-19 Confinement. Front Psychiatry, 11, 729. https://doi.org/10.3389/fpsyt.2020.00729
Mactavish, J., Schleien, S. (2004). Re-injecting spontaneity and balance in family life: Parents’ perspectives on recreation in families that include children with developmental disability. Journal of Intellectual Disability Research, 48(2), 123-141. https://doi.org/10.1111/j.1365-2788.2004.00502.x
Mazur, J., 2013. Aktywność fizyczna młodzieży szkolnej w wieku 9-17 lat. Aktualne wskaźniki, tendencje ich zmian oraz wybrane zewnętrzne i wewnętrzne uwarunkowania. Raport końcowy (Physical activity of school teenagers age 9-17 current indicators, tendencies of their changes and selected external and internal conditions. Final report). Instytut Matki i Dziecka, Warszawa. http://www.downloads/aktywnosc_9-17_ilosciowy3b67%20(4).pdf
Mazur, J., Małkowska-Szkutnik, A. (2018). Zdrowie uczniów w 2018 r. na tle nowego modelu badań HBSC (HBSC Poland national report). Instytut Matki i Dziecka. Warszawa. http://www.imid.med.pl/files/imid/Aktualnosci/Aktualnosci/raport%20HBSC%202018.pdf
Mazur, J., Woynarowska, B. (2004). Indicators of social inequalities for school-age children health surveys. Przegląd Epidemiologiczny, 58(2), 377-390. https://pubmed.ncbi.nlm.nih.gov/15517819/
Mutz, M., Gerke, M. (2020). Sport and exercise in times of self-quarantine: How Germans changed their behaviour at the beginning of the Covid-19 pandemic. International Review for the Sociology of Sport, 56(3), 305-316. https://doi.org/10.1177/1012690220934335
Nakigudde, J., Musisi, S., Ehnvall, A., Airaksinen, E., Agren, H. (2009). Adaptation of multidimensional scale of perceived social support in a Ugandan setting. African Health Sciences, 9(1), 35-41
Ortega, F.B., Ruiz, J. R., Castillo, M. J., Sjöström, M. (2008). Physical fitness in childhood and adolescence: a powerful marker of health. International Journal of Obesity, 32(1), 1-11. https://doi.org/10.1038/sj.ijo.0803774
Pluta, B., Bronikowska, M., Tomczak, M., Laudańska-Krzemińska, I., Bronikowski, M. (2017). Family leisure-time physical activities–results of the “Juniors for Seniors” 15-week intervention programme. Biomedical Human Kinetics, 9(1), 165-174. https://doi.org/10.1515/bhk-2017-0023
Pluta, B., Korcz, A., Krzysztoszek, J., Bronikowski, M., Bronikowska, M. (2020). Associations between adolescents’ physical activity behavior and their perceptions of parental, peer and teacher support. Archives of Public Health, 78. https://doi.org/10.1186/s13690-020-00490-3
Prochaska, J.J., Sallis, J.F., Long, B. (2001). A physical activity screening measure for use with adolescents in primary care. Archives of Pediatrics and Adolescent Medicine, 155, 554-559, https://doi.org/10.1001/archpedi.155.5.554
Ricci, F., Izzicupo, P., Moscucci, F., Sciomer, S., Maffei, S., Di Baldassarre, A. (2020). Recommendations for physical inactivity and sedentary behavior during the coronavirus disease (COVID-19) pandemic. Frontiers in Public Health, 8, 199. https://doi.org/10.3389/fpubh.2020.00199
Salari, N., Hosseinian-Far, A., Jalali, R., Vaisi-Raygani, A., Rasoulpoor, S., Mohammadi, M., (2020). Prevalence of stress, anxiety, depression among the general population during the COVID-19 pandemic: a systematic review and meta-analysis. Globalization and Health, 16, 57. https://doi.org/10.1186/s12992-020-00589-w
Sallis, J. F., Adlakha, D., Oyeyemi, A., & Salvo, D. (2020). An international physical activity and public health research agenda to inform coronavirus disease-2019 policies and practices. Journal of Sport and Health Science, 9(4), 328-334. https://doi.org/10.1016/j.jshs.2020.05.005
Sallis, J.F., Prochaska, J.J., Taylor, W.C. (2000). A review of correlates of physical activity of children and adolescents. Medicine & Science in Sports & Exercise, 32, 963-975. https://doi.org/10.1097/00005768-200005000-00014
Schnitzer, M., Schott, S. E., Kopp, M., Barth, M. (2020). COVID-19 stay-at-home order in Tyrol, Austria: sports and exercise behaviour in change? Public Health, 185, 218-220. https://doi.org/10.1016/j.puhe.2020.06.042
Stanton, R., To, Q. G., Khalesi, S., Williams, S. L., Alley, S. J., Thwaite, T. L. (2020). Depression, anxiety and stress during COVID-19: associations with changes in physical activity, sleep, tobacco and alcohol use in Australian adults. International Journal of Environmental Research and Public Health, 17, 4065. https://doi.org/10.3390/ijerph17114065
Stubbs, B., Vancampfort, D., Rosenbaum, S., Firth, J., Cosco, T., Veronese, N. (2017). An examination of the anxiolytic effects of exercise for people with anxiety and stress-related disorders: a meta-analysis. Psychiatry Research, 249, 102-108. https://doi.org/ 10.1016/j.psychres.2016.12.020
Tate, E. B., Shah, A., Jones, M., Pentz, M. A., Liao, Y., Dunton, G. (2015). Toward a Better Understanding of the Link Between Parent and Child Physical Activity Levels: The Moderating Role of Parental Encouragement. Journal of Physical Activity & Health, 12(9), 1238-1244. https://doi.org/10.1123/jpah.2014-0126
Trost, S.G., Kerr, L.M., Ward, D.S., Pate, R.R. (2001). Physical activity and determinants of physical activity in obese and non-obese children. International Journal of Obesity and Related Metabolic Disorders, 25(6), 822-9. https://doi.org/10.1038/sj.ijo.0801621
Trost, S., McIver, K., Pate, R. (2005), Conducting accelerometer-based activity assessments in field-based research. Medicine and Science in Sports and Exercise, 37(11), 531-543
Trost, S., Sallis, J., Pate, R. R., Freedson, P. S., Taylor, W. C., & Dowda, M. (2003), Evaluating a model of parental influence on youth physical activity. American Journal of Preventive Medicine, 25(4), 277-282
Welk, G. J., Wood, K., & Morss, G. (2003), Parental influences on physical activity in children: An exploration of potential mechanisms, Paediatric exercise science, 15(1), 19-33, https://doi.org/10.1123/pes.15.1.19
Wilson, A., Dollman, J. (2007). Social influences on physical activity in Anglo-Australian and Vietnamese-Australian adolescent female in a single sex school. Journal of Science and Medicine in Sport, 10(3), 147-155. https://doi.org/10.1016/j.jsams.2007.10.012
World Health Organization. (2020a). WHO Guidelines on Physical Activity and Sedentary Behaviour. Geneva, Switzerland. https://apps.who.int/iris/handle/10665/337001 (accessed August 21, 2021)
World Health Organisation. (2020b). WHO Announces COVID-19 Outbreak a Pandemic. https://www.euro.who.int/en/health-topics/health-emergencies/coronavirus-COVID-19/news/news/2020/3/who-announces-covid-19-outbreak-a-pandemic (accessed August 21, 2021)
World Health Organization. (2020c). How to Stay Physically Active during COVID-19 Self-Quarantine. http://www.euro.who.int/en/health-topics/health-emergencies/coronavirus-covid-19/novel-coronavirus-2019-ncov-technical-guidance/stay-physically-active-during-self-quarantine (accessed August 21, 2021)
Wu, F., Zhao, S., Yu, B., Chen, Y.M., Wang, W., Song, Z.G., Hu, Y., Tao, Z.W., Tian, J.H., Pei, Y.Y., Yuan, M.L., Zhang, Y.L., Dai, F.H., Liu, Y., Wang, Q.M., Zheng, J.J., Xu, L., Holmes, E.C., Zhang, Y.Z. (2020). A new coronavirus associated with human respiratory disease in China. Nature, 579(7798), 265-269. https://doi.org/10.1038/s41586-020-2008-3
Zabriskie, R., Aslan, N., Williamson, M. (2018). Turkish family life: A study of family leisure, family functioning, and family satisfaction. Journal of Leisure Research, 49, 27-28. https://doi.org/10.1080/00222216.2018.1425049
Zabriskie, R., McCormick, B. (2003). Parent and child perspectives of family leisure involvement and satisfaction with family life. Journal of Leisure Research, 35(2), 163-189. https://doi.org/10.1080/00222216.2003.11949989
Zhang, Y., Ma, ZF. (2020). Impact of the COVID-19 Pandemic on Mental Health and Quality of Life among Local Residents in Liaoning Province, China: A Cross-Sectional Study. International Journal of Environmental Research and Public Health, 17(7), 2381. https://doi.org/10.3390/ijerph17072381
Zimet, G., Dahlem, N., Zimet, S., Farley, G. (1988). The Multidimensional Scale of Perceived Social Support. Journal of Personality Assessment, 52(1), 30-41. https://doi.org/10.1207/s15327752jpa5201_2