(1) Background: Universities play a crucial role in nurturing healthy habits, and physical activity has emerged as a valuable tool for enhancing the life satisfaction, self-efficacy, and resilience of college students. Therefore, the purpose of this study was to investigate the mediating role of physical activity in the relationship between life satisfaction and self-efficacy as well as resilience among Chinese university students. (2) Method: This study used the Physical Activity Rating Scale (PARS-3), the Self-Efficacy Scale (CGES), the Mental Toughness Scale (CD-RISC), and the Life Satisfaction Scale (CSLSS) to administer questionnaires to 353 university students from two universities in Chengdu, Sichuan Province. Using a random simple sampling method, the data were processed and analyzed using SPSS 22.0 and Excel software. (3) Results: (1) Physical activity exhibited a significant positive correlation with self-efficacy, resilience, and life satisfaction; self-efficacy was significantly and positively related to resilience and life satisfaction; and resilience was significantly and positively related to life satisfaction. (2) Physical activity had a positive predictive effect on life satisfaction (β = 0.2771; 95% confidence interval (CI): 0.1905, 0.3637, 55.51%). (3) Self-efficacy (β = 0.0368; 95% confidence interval (CI): 0.0087, 0.0692, 7.37%) and resilience (β = 0.137; 95% confidence interval (CI): 0.0919, 0.1894, 27.44%) mediated the relationship between physical activity and life satisfaction. Also, the chain-mediating effect of self-efficacy and resilience between physical activity and life satisfaction reached significant levels (β = 0.0483; 95% confidence interval (CI): 0.0279, 0.0745, 9.68%). (4) Conclusion: Active participation in physical activity not only enhanced the life satisfaction of college students but also indirectly impacted their life satisfaction by improving their self-efficacy and resilience. Consequently, this led to an overall improvement in the life satisfaction of college students.

Purpose: This study explores the relationship between physical exercise and older people’s subjective well-being and the mediating role of a sense of meaning in life and self-esteem by using a structural equation modeling (SEM) approach, in order to provide some suggestions for improving older people’s subjective well-being.Methods: In this study, a cross-sectional survey was conducted offline using a simple random method of collection, and the Physical Activity Rating Scale (PARS-3), the Subjective Well-being Scale (SWB), the Meaningfulness of Life Scale (MLQ), and the Self-Esteem Scale (SES) were applied to 419 older adults who participated in physical exercise from Chengdu (Qingyang District, Wuhou District, and Chenghua District), Sichuan Province, China, with the voluntary participation of the subjects. 197 males and 222 females, with a mean age of 72.49 (SD = 1.57). The study used SPSS 25.0 and Process 3.5 plug-in for statistical processing of the data, Cronbach’s alpha coefficient for intra-variate consistency testing, Harman’s one-way test for common method bias testing and multiple covariance diagnosis, and finally regression analysis and Bootstrap sampling test for significance of mediating effects.Results: Physical exercise was able to have a positive effect on the level of subjective well-being of older adults (β = 0.0305; 95% confidence interval (CI): 0.0226, 0.0384; p < 0.05), and a mediation analysis of sense of meaning in life and self-esteem revealed that they were able to have independent and chained mediation effects, with four pathways: first, physical exercise directly affected subjective well-being of older adults (β = 0.0149; 95% CI: 0.0072, 0.0226; p < 0.05; β = 0.0149; 95% CI: 0.0072, 0.0226; p < 0.05); secondly, sense of meaning in life mediated the relationship between physical exercise and subjective well-being of older adults (β = 0.0075; 95% CI: 0.0041, 0.0115; p < 0.05); thirdly, self-esteem mediated the relationship between physical exercise and subjective well-being of older adults (β = 0.0075; 95% CI: 0.0041, 0.0115; p < 0.05). (β = 0.0061; 95% CI: 0.0034, 0.0094; p < 0.05); fourth, a chain mediating effect of sense of meaning in life and self-esteem in the relationship between physical exercise and subjective well-being in older adults (β = 0.0021; 95% CI: 0.0010, 0.0035; p < 0.05).Conclusion and prospects: As indicated by the results, physical exercise can enhance the subjective well-being of older adults through sense of meaning in life and self-esteem, therefore, in order to be able to enhance the subjective well-being of older adults, enhancing the level of sense of meaning in life and self-esteem of older adults is an effective means.

A two-step double-side friction stir welding (DS-FSW) technique was proposed to join 20 mm thick Mg–Y–Nd magnesium alloy plates. FSW was first carried out on one side of the butt joint, and then the plates were left-right reversed for the other side welding. The DS-FSW joint was free of defects and the weld nugget zone (NZ) showed fine equiaxial grains. An overlap zone with ultrafine grain (∼2.19 µm) and dispersive particles existed between the two welding tracks, beneficial to the integrity of the joint. The ultimate tensile strength (σ_UTS), yield strength (σ_0.2), and elongation rate (δ) of the joint were 277. 6, 204.1 MPa, and 7.27%. A high joint efficiency (σ_UTS ratio between the joint and parent material) was achieved at ∼82.6%.

To investigate the influence of aerobic exercise on depression among the young people. PubMed, Web of science, Embase, Cochrane, EBSCO were searched from inception to November 2023. RCT studies, assessing the use of aerobic exercise in young people aged 6–35 years and then determining the development of depression in young people (aged 6–35 years), were selected, and mean ± SD values adjusted for the presence of baseline depression were extracted. Study quality was assessed using the Review manager 5.4.1 and Cochrane 5.1 item on risk of bias and precision of observational studies. Two reviewers conducted all review stages independently. Selected data were pooled using random-effects meta-analysis. The included studies evaluated the relationship between aerobic exercise and depression at various time points among young individuals, and provided corresponding mean ± SD values. Depression diagnosis in the selected studies was conducted using the Depression Correlation Scale. After screening 2296 articles, 163 articles were selected for full-text review, and 8 of those were further reviewed. Ultimately, 12 studies, involving 658 individuals, were included in the meta-analysis. The results of the meta-analysis indicated that aerobic exercise could effectively improve depression in young people (d = -1.33, 95%CI: -1.78 ~ -0.87, P < 0.05). Subgroup analysis demonstrated that aerobic exercise was beneficial for both depression (d = -2.68, 95%CI: -3.87 ~ -1.48, P < 0.05) and non-depression (d = -0.85, 95%CI: -1.20 ~ -0.51, P < 0.05) conditions, as well as for low intensity (d = -0.93, 95%CI: -1.29 ~ 0.58, P < 0.05) and moderate intensity (d = -2.08,95%CI:-2.88 ~ -1.27, P < 0.05) exercises. Additionally, aerobic exercise was found to significantly alleviate depression in young people when performed for 40 min or less (d = -2.00,95%CI: -2.96 ~ -1.04, P < 0.05), whereas durations exceeding 40 min showed a lesser effect (d = -0.85,95%CI:-1.47 ~ -0.24, P < 0.05). Furthermore, the duration-based analysis revealed that aerobic exercise improved depression levels in young people regardless of duration, whether it was for less than 6 weeks (d = -1.27,95%CI: 2.12 ~ 0.14, P < 0.05), 6 to 11 weeks (d = 1.55, 95% CI: 2.16 ~ 0.94, P < 0.05), or more than 12 weeks (d = 1.00, 95% CI: -1.76 ~ -0.24,P < 0.05). Overall, these findings suggest that aerobic exercise is a promising intervention for alleviating depression in young individuals. Both short (less than 40 min) and long (more than 40 min) periods of aerobic exercise were effective in improving depressive symptoms. However, the optimal duration of aerobic exercise may vary depending on the specific population and individual factors studied, such as age, health status, and exercise tolerance. Therefore, this study concluded that the most effective exercise regimen, 40 min of moderate-intensity aerobic exercise three times a week for 6 to 11 weeks, showed more significant improvement in depression indicators in individuals with depressive symptoms.

Background: Adolescence is also accompanied by ongoing mood changes (relative to childhood and adulthood), which can trigger more extreme negative emotional responses. Physical exercise alleviates negative emotions and reduces the risk of mental illness. However, the effect of physical exercise on negative emotions in adolescents is unclear, so it is valuable to synthesize previous studies with meta-analysis.Objective: To examine the influence of physical exercise (PE) intervention on negative emotions in adolescents aged 10 to 19 years.Methods: We retrieved the articles from PubMed, Web of Science, EBSCO, Cochrane, and Embase up to April 11, 2024. The main search terms were physical exercise, negative emotions, adolescents, randomized controlled trials. The meta-analysis was conducted using Review Manager 5.3. A random-effects model was employed to calculate the standardized mean difference (SMD) and 95% confidence interval (CI). Subgroups were analysed as the type of negative emotions, type of control group, intervention type, duration, time, frequency.Results: The PE intervention group exhibited a significantly superior improvement in alleviating negative emotions compared to the control group (SMD = -0.59, 95% CI: -0.92 to -0.26, p < 0.01, Z = 3.50, I² = 95%). PE was particularly effective in mitigating adolescent depression (SMD = -0.67, 95% CI = -1.07 to -0.28, p < 0.01, I² = 96%) but did not yield significant results in reducing adolescent anxiety (SMD = -0.29, 95% CI = -0.63 to 0.05, p = 0.10, I² = 95%).Conclusion: PE intervention can ameliorate negative emotions in adolescents.Systematic Review Registration: https://www.crd.york.ac.uk/prospero/, identifier CRD42024534375.

Objective: To explore the functions that physical activity (PA), life satisfaction, and self-efficacy have in the process of coping with anxiety among Chinese college students, and to explore the mediating role of life satisfaction and self-efficacy in this process.Methods: Participants were 358 college students (186 males, 172 females, mean age 20.88, SD = ±1.80). Psychosocial tests including the Physical Activity Rating Scale (PARS-3), College Student Life Satisfaction Scale (CSLSS), General Self-Efficacy Scale (GSES), and Generalized Anxiety Disorder Scale (GAD-7) were completed. Correlations between variables were calculated using Pearson’s test. The mediation model was tested using the SPSS 26.0 PROCESS macro and regression bootstrap.Results: Physical activity showed a negative correlation with anxiety (β = −0.1617, p &lt; 0.001., life satisfaction and self-efficacy played a role in the relationship between physical activity and anxiety. More importantly, physical activity was associated with anxiety through parallel mediating effects of life satisfaction and self-efficacy, with a total mediating effect of 55.34%.Conclusion: By increasing college students’ participation in physical activity, it helps to promote the growth of their life satisfaction and self-efficacy, which is the key to reducing anxiety and promoting college students’ mental health.