This study aimed to explore the interplay between physical activity, self-efficacy, stress self-management and mental health among adolescents. The study gathered data from an online survey conducted among 400 Chinese middle school students (mean age = 13.74 years). The collected data were analyzed using SPSS 27.0 and PROCESS 4.1. The findings indicated a positive and significant relationship between physical activity, self-efficacy, stress self-management, and mental health. Notably, the association between physical activity and mental health was entirely mediated by self-efficacy and stress self-management. Moreover, self-efficacy and stress self-management exhibited a chain mediation effect on the relationship between physical activity and mental health. It is suggested that interventions focusing on physical activity should prioritize strategies for enhancing students’ self-efficacy and stress self-management skills as integral components of promoting adolescents’ mental health. Future research should delve into identifying specific types of physical activities that have a greater potential to enhance self-efficacy and stress self-management abilities.

Depressive symptoms, a prevalent mood illness, significantly harm college students’ physical and mental health. Individuals have experienced some degree of psychological harm as a result of the COVID-19 pandemic. Taking this into account, the purpose of this study was to investigate the relationship between physical activity (PA) and depressive symptoms among college students during the COVID-19 pandemic, as well as the mediating roles of perceived stress and academic procrastination. A total of 586 college students were subjected to the Physical Activity Scale (PARS-3), the Perceived Stress Scale (PSS-10), the Procrastination Assessment Scale-Students (PASS), and the Patient Health Questionnaire (PHQ-9). Findings from this research demonstrated that there was a significant positive correlation between perceived stress, academic procrastination, and depressive symptoms, while PA was significantly negatively correlated with perceived stress, academic procrastination, and depressive symptoms. The results of the chain mediation analysis showed that PA had a significant direct effect on depressive symptoms. Perceived stress, academic procrastination, and perceived stress-academic procrastination had significant mediating and chain mediating effects on the relationship between PA and depressive symptoms. In conclusion, PA among college students during the COVID-19 pandemic affects their depressive symptoms directly and indirectly through the independent mediating effect of perceived stress and academic procrastination, as well as the chain mediating effect of perceived stress and academic procrastination.

The digital and social network revolution in the fitness industry will provide consumers with opportunities to achieve their healthy and active lifestyle goals both online and offline. The online fitness communities provide us an ideal context for the health behavior research with behavioral logs and user-generated content. Enhanced user profiles can empower platform operators to implement more tailored recommendations, thereby enhancing the efficiency of precision marketing and fitness promotion. This study aims to accurately construct user profiles for Chinese online fitness community users and provide future health promotion strategies accordingly. We propose a novel approach that integrates explicit behavior logs and implicit user preferences to accurately construct user profiles. Our findings indicate that users primarily prioritize fitness benefits, incentives, and decision-making. Our results demonstrate the relationship between fitness behavior and implicit preferences, suggesting that promoting fitness behavior can be achieved through streamlining decision-making processes, establishing incentive communities, and emphasizing benefits.

Students majoring in physical education are the main source of physical education teachers in Chinese schools, and they are the main body in achieving the function of physical education in schools. The improvement of their altruistic behavior helps enhance the educational literacy of outstanding physical education teachers. This study conducted a questionnaire survey on 310 students majoring in physical education from 5 universities in 5 selected regions using the General Interpersonal Communication Objective Scale, Interpersonal Reactivity Index-C, the “responsibility” subscale of the Big Five Inventory Questionnaire, and the Altruistic Behavior of College Students questionnaire. We performed correlation analysis, mediation effect analysis, and moderation effect analysis on the data using SPSS 24.0 and MPLUS 7.4. Empathy partially mediates 30% of the total effect between interpersonal relationships and altruistic behavior; social responsibility has a moderating effect on empathy and altruistic behavior, with higher levels of responsibility having a greater moderating effect. Interpersonal relationships, empathy, and a sense of responsibility affect the current, recent, and long-term states of altruistic behavior, respectively. To improve students’ altruistic behavior throughout the entire process, schools should develop training systems specifically for interpersonal relationships, empathy, and social responsibility.

This study aimed to explore the interplay between physical activity, self-efficacy, stress self-management and mental health among adolescents. The study gathered data from an online survey conducted among 400 Chinese middle school students (mean age = 13.74 years). The collected data were analyzed using SPSS 27.0 and PROCESS 4.1. The findings indicated a positive and significant relationship between physical activity, self-efficacy, stress self-management, and mental health. Notably, the association between physical activity and mental health was entirely mediated by self-efficacy and stress self-management. Moreover, self-efficacy and stress self-management exhibited a chain mediation effect on the relationship between physical activity and mental health. It is suggested that interventions focusing on physical activity should prioritize strategies for enhancing students' self-efficacy and stress self-management skills as integral components of promoting adolescents' mental health. Future research should delve into identifying specific types of physical activities that have a greater potential to enhance self-efficacy and stress self-management abilities.

Objective: Evidence regarding the association between physical activity (PA) and the long-term incidence of inflammatory bowel disease (IBD) remains limited and inconsistent. This study aimed to evaluate the longitudinal relationship between varying intensities of PA and the risk of developing IBD, specifically Crohn's disease (CD) and ulcerative colitis (UC). Methods: This prospective cohort study analyzed data from 293,578 participants enrolled in the UK Biobank. Self-reported PA was categorized by intensity into light, moderate, and vigorous levels. Incident IBD cases were identified through linked hospital admission and death registry records. The association between PA levels and IBD incidence was assessed using multivariable Cox proportional hazards regression models. Furthermore, restricted cubic spline curves were utilized to examine potential non-linear associations, and cumulative event curves were generated to visualize disease progression over time. Results: During the follow-up period, higher levels of total PA were significantly associated with a reduced risk of CD, suggesting a protective effect of consistent physical exertion. While the relationship between PA and UC was insignificant in the general cohort, a significant reduction in UC risk was observed among individuals whose activity levels exceeded standard health recommendations. Notably, the data revealed a complex intensity-dependent relationship: whereas moderate-to-vigorous activity generally trended toward benefit, excessive light PA was paradoxically associated with an increased risk of UC within specific subpopulations. Conclusion: In this large-scale prospective study, PA was inversely associated with the risk of CD. However, the association between PA and UC appears more nuanced, with the protective benefits potentially contingent upon higher activity thresholds and specific intensity profiles. These findings suggest that tailored exercise recommendations may be necessary for IBD prevention strategies.