Journal of Preventive Medicine and Public Health

Original Articles

Associations of Sex and Household Area With Physical Activity and Sedentary Behavior During Total and Partial COVID-19 Lockdowns in Chile: A Study in Adults Aged 18-44 Years: Jairo Vanegas-López, Rodrigo Guzmán-Venegas, Gabriel Marzuca-Nassr, Claudio Muñoz-Poblete, Gonzalo Quiroz-Sandoval, Juan Silva-Urra, Andres Orellana-Uribe, Sebastián Dubó, Ignacio Sepúlveda, José Luis Márquez; J Prev Med Public Health. 2025;58(2):177-187. Published online December 5, 2024; DOI: https://doi.org/10.3961/jpmph.24.461

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Abstract Summary PDF: Objectives
The coronavirus disease 2019 pandemic led to various intensities of lockdowns, affecting lifestyles globally. This study investigates the impact of partial lockdown versus total lockdown on adult physical activity (PA) and sedentary behavior.
Methods
A cross-sectional online survey was conducted from April 2020 to October 2020, with 493 participants included in the analysis.
Results
The analysis revealed no significant differences in total PA or total sitting time between partial lockdown and total lockdown scenarios. However, moderate physical activity (MPA) significantly decreased during total lockdowns, with more pronounced reductions among females than males. Notably, a positive correlation was found between household area and MPA, suggesting that larger living spaces may encourage more PA. A negative correlation was observed between sitting time and MPA during both types of lockdown.
Conclusions
Total lockdown conditions were associated with a significant decrease in MPA, highlighting sex disparities in PA responses. Living space size emerged as a crucial factor in maintaining PA levels during restricted conditions. This study emphasizes the need to consider environmental and demographic factors in public health strategies during prolonged periods of restricted movement.; Summary

Key Message
This study assessed the impact of partial and total COVID-19 lockdowns on physical activity and sedentary behavior in Chilean adults aged 18–44 years. Although total physical activity and sitting time did not significantly differ between lockdown types, moderate physical activity was significantly lower during total lockdowns, particularly among females. A positive association between household area and moderate activity suggests that public health strategies should consider gender and living conditions to mitigate the negative effects of prolonged restricted movement.

The Influence of Family Adversities on Longitudinal Changes in Physical Inactivity Among Korean Adolescents During the COVID-19 Pandemic: Tae Kyoung Lee, Jing Zhu, Young Mi Kim, Ze-Kai Jiang, Meilin Zhang, Won Ha Choi, Tae-Young Pak, Hana Song; J Prev Med Public Health. 2024;57(5):443-450. Published online August 4, 2024; DOI: https://doi.org/10.3961/jpmph.24.236

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Abstract Summary PDF Supplementary Material: Objectives
Lack of physical activity has a critical effect on the physical and mental health of adolescents. This study examined the influence of family adversities on the longitudinal changes in physical inactivity among adolescents during the coronavirus disease 2019 (COVID-19) pandemic.
Methods
The study used multi-wave data from the Korean Children and Youth Panel Survey, including 2590 Korean adolescents aged 12-14 years. The longitudinal trajectory of physical inactivity among adolescents and the effects of related factors were estimated using a latent growth modeling method.
Results
Our results revealed a significant increase in physical inactivity among adolescents over time. At the onset of the pandemic, approximately one-seventh of Korean middle schoolers reported a lack of physical activity. However, 3 years later, during the quarantine, nearly one-fifth of these adolescents reported a significant increase in their physical inactivity. Initially, low level parental education was predictive of adolescents’ physical inactivity, but this effect diminished over time, becoming statistically insignificant by the end of the 3-year period. Moreover, the increase in physical inactivity over the 3 years was significantly influenced by parental rejection.
Conclusions
These findings suggest that adolescents who experience parental rejection are more likely to report an increase in sedentary behaviors in contexts such as the COVID-19 pandemic.; Summary

Korean summary
본 연구는 팬데믹 기간 동안 청소년의 신체 활동 변화와 신체 활동 부족에 대한 부정적 가정 환경의 영향을 조사했다. 한국 청소년 2,590명을 대상으로 한 3년간의 종단 패널 데이터를 잠재 성장 모형으로 분석하여 신체 활동 부족의 변화를 추적하였다. 그 결과, 팬데믹 기간 동안 청소년들의 신체 활동 부족이 현저히 증가했으며, 부모의 거부가 이러한 증가에 유의한 영향을 미친 것으로 나타났다.

Key Message
This study examined the impact of family adversities on the longitudinal changes in physical inactivity among 2,590 Korean adolescents during the COVID-19 pandemic. Over the 3-year period, physical inactivity increased significantly, with parental rejection playing a key role in this rise. While low parental education initially predicted higher levels of inactivity, its influence diminished over time.

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