National trends in physical activity among adolescents in South Korea before and during the COVID-19 pandemic, 2009-2021.

Through a nationwide representative study, there was no significant difference with regard to the number of Korean adolescents who achieved the PA guidelines (pre-and-post-pandemic); however, the prevalence of recommended levels of PA needs to increase more based on the trend before the COVID-19 outbreak. The findings of this study suggest reinforcement of the importance of public health policies for Korean youths to be more physically active, especially during and after the pandemic. This article is protected by copyright. All rights reserved.