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Original Article Associations between digital media use and lack of physical exercise among middle-school adolescents in Korea
Gyeongmin Kimorcid , Hyunsuk Jeongorcid , Hyeon Woo Yimorcid
Epidemiol Health 2023;45e2023012-0
DOI: https://doi.org/10.4178/epih.e2023012
Published online: January 10, 2023
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Department of Preventive Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
Corresponding author:  Hyeon Woo Yim,
Email: y1693@catholic.ac.kr
Received: 3 May 2022   • Accepted: 7 December 2022

foOBJECTIVES: The reported effects of digital media overuse on physical activity among adolescents are inconsistent. This study examined the association between hours of digital media use and lack of moderate-intensity physical exercise (mPE) according to the type of digital media.
METHODS
This study included 1,837 middle school students from the iCURE (Internet user Cohort for Unbiased Recognition of gaming disorder in Early Adolescence) study conducted in Korea. Hours spent using digital media were measured by self-reported daily usage time for Internet games, messengers, social media, and watching game streaming on weekdays. Lack of mPE was defined as performing a minimum of 30 minutes at a time less than twice weekly. Multivariable logistic regression analysis stratified by sex was performed.
RESULTS
Among male students, the group with the highest hours of using either Internet games or watching game streaming was more likely to lack mPE than each non-user group. In contrast, among male students, the group using either messengers or social media had a higher rate of mPE compared to each non-user group. Female students showed no association between hours spent using Internet games, messengers, social media, or watching game streaming and a lack of mPE.
CONCLUSIONS
Among male middle school students in Korea, the excessive use of Internet games or watching game streaming was associated with a lack of mPE. Thus, guidelines should be established regarding adolescent use of internet games and watching game streaming.


Epidemiol Health : Epidemiology and Health