Exercise addiction in college students: the impact of body dissatisfaction, stress, physical activity and gender.

Introduction: Engaging in physical activity is commonly regarded as beneficial to health. However, exercise addiction may arise when enthusiasm for exercise reaches a level that disrupts life balance and overall well-being. Factors influencing college students' exercise addiction remain largely unknown.

Mediating role of exercise in the relationship between body dissatisfaction and overeating using structural equation modeling.

Background: With the rapid development of society, teenagers have more access to individuals with perfect bodies and are becoming more concerned about their body image. Currently, few studies assess body image and eating disorders comprehensively in China. Given the seriousness of these issues, there is an urgent need to understand the current state of body image and eating behaviors among Chinese people and formulate preventive strategies.

Effects of physical activity on sleep quality among university students: chain mediation between rumination and depression levels.

Background: Colleges and universities are currently facing the major public health issue of poor sleep quality. Sleep quality must be taken seriously to maintain the students' emotional and physical well-being. Thus, this study sought to determine how university students' levels of physical activity related to the quality of their sleep, as well as to explore the mechanisms via which physical activity affects sleep and provide suggestions for improving it.

Relative humidity sensor based on a silver nano-grating made from DVD discs.

A relative humidity sensor based on a silver nano-grating was proposed. By stripping and cleaning commercially available CD and DVD discs, polycarbonate plates with different grating periods are obtained. These plates as templates are coated with a layer of sputtered silver film to form silver nano-gratings, which exhibit refractive index sensing sensitivities of 517 nm/RIU and 742.