The impact of COVID-19 pandemic on sleep duration and mental health among middle school students: a 3-year cross-sectional survey.

Background: Since the outbreak of COVID-19 in late 2019, and until the Chinese government downgraded the pandemic control measures to Category B management in January 2023, various epidemic prevention measures were implemented across regions based on the local spread of the virus. Correspondingly, educational formats shifted between online and offline teaching according to the pandemic situation. Changes in daily life and teaching methods, along with the high initial mortality rate of COVID-19, have had varying degrees of negative impact on the mental health (MH) of adolescents.

The protective effect of physical activity on mental health of middle school students at different stages during the COVID-19 outbreak.

This study aims to further understand the changes in physical activity level(PAL) and mental health among adolescents before and after the outbreak of COVID-19 and explore the protective role of physical activity (PA) on the mental health of adolescents during major disasters. A convenient sampling method was used to conduct a cross-sectional survey. The cross-sectional data from 2838 Chinese middle school students (mean age = 14.

Construction of a model for adolescent physical and mental health promotion based on the multiple mediating effects of general self-efficacy and sleep duration.

We developed a model for promoting adolescent physical and mental health (MH) to investigate the integrated pathways of physical activity (PA), MH, general self-efficacy (GSE), and sleep duration (SD) promotion among adolescents in China. The research hypotheses were tested using questionnaires, descriptive statistics, and validated factor analysis. The mean age of the respondents was 14.

Changes in physical activity level of adolescents and its relationship with mental health during regular COVID-19 prevention and control.

Purpose: This study aimed to analyze the impact of regular prevention and control of COVID-19 on the physical activity level (PAL) of adolescents and the relationship between PAL and mental health.

Methods: Using the convenience sampling method, two stages of the on-site cross-sectional investigation were conducted in 11 middle schools in Guiyang City in China. There were 1132 participants who completed the Physical Activity Questionnaire for old children (PAQ-C) in October 2020, and 1503 participants who completed the PAQ-C and Mental Health Inventory of Middle-school students (MMHI-60) in October 2021.