Zuń Katarzyna, Zych Magdalena, Rząca Marcin Stanisław, Kocka Katarzyna. The Internet addiction among students of primary schools and lower and upper secondary schools and its relation to their level of physical activity. Journal of Education, Health and Sport. 2017;7(12):531-544. eISSN 2391-8306. DOI http://dx.doi.org/10.5281/zenodo.1127741 http://ojs.ukw.edu.pl/index.php/johs/article/view/5144 https://pbn.nauka.gov.pl/sedno-webapp/works/842487 The journal has had 7 points in Ministry of Science and Higher Education parametric evaluation. Part B item 1223 (26.01.2017). 1223 Journal of Education, Health and Sport eISSN 2391-8306 7 © The Authors 2017; This article is published with open access at Licensee Open Journal Systems of Kazimierz Wielki University in Bydgoszcz, Poland Open Access. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited. This is an open access article licensed under the terms of the Creative Commons Attribution Non Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted, non commercial use, distribution and reproduction in any medium, provided the work is properly cited. This is an open access article licensed under the terms of the Creative Commons Attribution Non Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted, non commercial use, distribution and reproduction in any medium, provided the work is properly cited. The authors declare that there is no conflict of interests regarding the publication of this paper. Received: 10.11.2017. Revised: 15.11.2017. Accepted: 22.12.2017. The Internet addiction among students of primary schools and lower and upper secondary schools and its relation to their level of physical activity Katarzyna Zuń1, Magdalena Zych1, Marcin Stanisław Rząca3, Katarzyna Kocka4 1Students scientific association, Chair of Oncology and Environmental Health, Medical University of Lublin, Poland 1Studenckie Koło Naukowe, Katedra Onkologii i Środowiskowej Opieki Zdrowotnej, Uniwersytet Medyczny w Lublinie, Poland 2Department of Oncology, Chair of Oncology and Environmental Health, Medical University of Lublin, Poland 2Zakład Onkologii, Katedra Onkologii i Środowiskowej Opieki Zdrowotnej, Uniwersytet Medyczny w Lublinie, Poland 3Department of Family Medicine and Community Nursing, Chair of Oncology and Environmental Health, Medical University of Lublin, Poland 3Zakład Medycyny Rodzinnej i Pielęgniarstwa Środowiskowego, Katedra Onkologii i Środowiskowej Opieki Zdrowotnej, Uniwersytet Medyczny w Lublinie, Poland Abstract Introduction: Physical activity is an important part of a healthy lifestyle, which significantly affects the development of children and youth. Unfortunately, students take less and less physical activity devoting much more time to surfing the Internet. Aim: Determining the relationship between the degree of the Internet addition and the level of physical activity of primary school students and lower and upper secondary school students. Material and methods: The study covered 463 students in the fifth and sixth grades of primary schools and the second and third classes of lower and upper secondary schools. The research was carried out from February 2017 to April 2017 in schools in Lublin, Radom and nearby villages. The applied research method was a diagnostic survey, and tools: the Internet addiction test, Dr. Kimberly Young and the authors’ self-designed survey containing questions about physical activity. Results: Dr. Young test pointed out the addiction in 53 out of 463 tested pupils (11.4%). The dependence concerned 12 primary school students (7.9%), 26 lower secondary school students (16.0%) and 15 upper secondary school students (10.0%). In contrast, the risk of addiction occurred in 33 (7.1%) students. Moderate physical activity during the last week for a minimum of 10 minutes 88.8% of respondents declared. Conclusions: Internet addiction affects the level of physical activity. The least time for physical activity have those diagnosed with addiction. It is advisable to undertake educational and activative actions on the forms of leisure time for pupils at all stages of education. Key words: students, school, the Internet addiction, physical activity