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Improving people's well-being is a key way to meet people's needs for a better life, and is of great importance in resolving the major contradictions in Chinese society. In this study, we evaluated peer relationships and self-actualization as potential mediators between physical exercise and subjective well-being in a sample of Chinese middle school students. A total of 1056 middle school students from six middle schools in Sichuan, China volunteered to complete questionnaires comprising the Physical Activity Rating Scale, Student Peer Relationship Scale, Short Index of Self-Actualization, Positive and Negative Affect Scale, and Satisfaction with Life Scale. Descriptive statistics, Pearson's product-moment correlation, and structural equation modeling were conducted using SPSS statistics 19.0. and AMOS 21.0 statistical software. The results showed that peer relationships and self-actualization partially mediate between physical exercise and subjective well-being. The mediation analysis revealed two paths: first, the single mediating path via peer relationships [indirect effect = 0.091, 95% CI: (0.053, 0.132)] and second, the serial mediating path via peer relationships and self-actualization [indirect effect = 0.015, 95% CI: (0.008, 0.024)]. The study confirmed for the first time the serial mediating role of peer relationships and self-actualization between physical exercise and subjective well-being of middle school students. It was suggested that middle school students could improve their peer relationships during physical exercise, thereby increasing the level of self-actualization, which results in better subjective well-being. [ABSTRACT FROM AUTHOR]

The present study examined the relationship between physical exercise and social anxiety by testing a moderated mediation model that focused on how peer relationships mediate the relationship between physical exercise and social anxiety and how flow experience moderates this mediated relationship. A total of 1056 middle school students from six middle schools in Sichuan, China, volunteered to complete questionnaires comprising the Physical Activity Rating Scale, Student Peer Relationship Scale, Social Anxiety Subscale of the Self-Consciousness Scale, and Short (9-Item) Dispositional Flow Scales. Regression analysis indicated that physical exercise negatively influenced social anxiety through peer relationships (indirect effect = -0.04, 95% CI = [-0.067, -0.013]). In addition, a moderated regression analysis indicated that under high-flow experience, physical exercise suppresses social anxiety through positive effects on peer relationships (indirect effect = -0.04, 95% CI = [-0.087, -0.003]), and under low-flow experience, physical exercise exacerbates social anxiety through negative effects on peer relationships (indirect effect = 0.06, 95% CI = [0.016, 0.105]). Some practical implications have been discussed on the physical exercise intervention for suppressing social anxiety in middle school students. [ABSTRACT FROM AUTHOR]

Exploring the development of multiscale behaviors of red-bed mudstone is beneficial for in-depth evaluation of swelling capacity and its progressive failure mechanism. In this paper, a macro-micro study was performed on rock samples in central Sichuan, China. The influence of environmental factors such as water content, degree of soaking, and gaseous moisture absorption was discussed. Spatial characterizations were finally described from pore structure and distribution. Experimental results suggested that deformation curve under water immersion had three stages of rapid growth, deceleration growth, and gradual stabilization. It can enter stable deformation within 60~80h and has short-term swelling effects, while gaseous moisture absorption presented long-term performance during 0~700 h. The difference in deformation between partial and complete immersion may be the release of swelling potential caused by humidity gradient and capillary suction. The strain-time curves during water immersion all tended to short-term swelling. Moreover, repeated drying and wetting promoted the time of shrinkage adjustment in the second cycle to be significantly shortened, resulting in a large amount of irreversible plastic deformation. Although initial water content influenced the final stable strain, it only changed the degree of deformation at initial stage. For the microscale structures, the closer to the end, the greater the porosity and the smaller the middle. The average porosity after 0, 1, and 2 dry and wet cycles reached 0.227%, 4.027%, and 6.121%, respectively. Geometric parameters such as volume and surface area of the pores enlarged with the increase of the number of cycles. Small pores gradually evolved into microcracks and large fissures. Besides, the pores developed from "tree-like" to "net-like" structures with continuous cycles. [ABSTRACT FROM AUTHOR]