# Effects of different levels of physical activity on the health-related quality of life among rural junior high school students in China: the moderating role of parental co-participation in physical activities

## TL;DR

This study shows that higher physical activity levels and parental involvement improve the quality of life for rural Chinese junior high students.

## Contribution

The study identifies parental co-participation as a significant moderator enhancing the benefits of physical activity on health-related quality of life in rural adolescents.

## Key findings

- Students with high physical activity levels had significantly higher HRQoL scores than those with low activity.
- Parental co-participation strengthened the positive relationship between physical activity and HRQoL, especially at high activity levels.
- The moderating effect of parental involvement was most pronounced in high physical activity groups.

## Abstract

Health benefits are associated with physical activity (PA) and PA levels. This study aims to explore the impact of PA levels (low, moderate, high) on health-related quality of life (HRQoL) among rural junior high school students in China, as well as the moderating role of parental co-participation in physical activities.

A stratified cluster sampling method was used to select 1,440 junior high school students from rural areas in southwest China. A total of 1,181 students completed the questionnaire, with a completion rate of 82.0%, including 608 boys (51.45%). HRQoL was measured using the Chinese version of the PedsQL 4.0, and PA levels was analyzed using the IPAQ-SF. T-tests, chi-square tests, linear regression, and two-way ANOVA were used for statistical analysis.

The results showed that 81.8% of rural junior high school students participated in moderate PA and high PA, with 82.3% of boys and 81.2% of girls. In both unadjusted and adjusted models, compared to low PA, students participating in moderate PA and high PA had significantly higher HRQoL scores in all dimensions, summary scales, and total scales, with the high PA showing particularly higher scores. Parental co-participation significantly moderated the relationship between PA and HRQoL (F = 13.569, p < 0.001), and the moderating effect was significant at every PA level, especially at high PA here the effect was most prominent.

Physical activity has a significant positive impact on HRQoL of rural junior high school students, with higher PA levels leading to more significant improvements in all HRQoL dimensions, summary scales, and total scales. Parental co-participation enhances the positive effect of PA on the HRQoL of rural junior high school students, particularly at the high PA, where the moderating effect is more pronounced. Parental co-participation, through the provision of social support, emotional reinforcement, and behavioral modeling, significantly enhances adolescents’ intrinsic motivation to participate in physical activity, and further augments its salutary effects on their physical and psychological well-being. This study provides empirical support for health promotion among rural adolescents.