(1) Background: Although physical activity has been widely recognized as an effective way to improve anxiety and depression, we lack a systematic summary of research on improving anxiety and depression during the COVID-19 pandemic. The study aims to systematically analyze how physical activity impacts on this situation in college students during COVID-19. (2) Methods: Both Chinese and English databases (PubMed the Cochrane Library, EMBASE, Web of Science, Scopus, Chinese National Knowledge Infrastructure, Wanfang) were analyzed. All the randomized controlled trials (RCTs) about physical activity intervention for this were included. We received eight eligible RCT experiments before the retrieval time (4 October 2022) in the meta-analysis. (3) Results: Physical activity benefits for college students with significant anxiety were (SMD = −0.50; 95% CI = −0.83 to −0.17; I² = 84%; p < 0.001; Z = 2.98;) and depression (SMD = −0.62; 95% CI = −0.99 to −0.25; I² = 80.7%; p < 0.001; Z = 3.27). Subgroup analyses showed physical activity of different intensities significantly impacted on improving college students’ depression and anxiety, but physical activity of 6 < 9 Mets intensity had a greater effect on anxiety than on depression. Interventions of eight weeks or less performed better than those of over eight weeks while interventions less than four times per week had a significant effect on improving the situation. The overall effect of a single intervention of 30 min was more effective than one of over 60 min. (4) Conclusion: Physical activities can effectively improve the situation of anxiety and depression for college students during the COVID-19 pandemic. However, a higher quality RCT experiment is needed to prove it.

Objective: This study investigates the mediating role of social capital in the effect of community physical activity on older adults’ subjective well-being and the moderating role of intergenerational support.Methods: Questionnaire data were collected from 318 older adults from China who participated in community-based physical activity using a random sampling method with the Physical Activity Scale, the Social Capital Scale, the Intergenerational Support Scale, and the Subjective Well-Being Scale. Data were analyzed by SPSS 25.0, PROCESS 3.4 and AMOS 24.Results: Community physical activity positively affected older adults’ subjective well-being (β = 0.539, p < 0.001), and social capital mediated the effect of community physical activity on older adults’ subjective well-being (β = 0.162, p < 0.001, 23.11% of the total effect). Intergenerational support moderated the relationship between community physical activity and older adults’ subjective well-being (β = 0.133, p < 0.001).Conclusion: Active participation in community physical activity can directly improve the subjective well-being of older persons on the one hand, and indirectly improve well-being by increasing social capital on the other. In addition, good intergenerational relationships can lead to more active participation in community physical activity, which in turn affects the subjective well-being of older people.

While the benefits of physical activity on mental health are well-known, systematic reviews and meta-analyses on its impact on mental illness in adults with COVID-19 are scarce. This study of 25 randomized controlled trials shows that physical activity significantly reduces anxiety (standardized mean difference [SMD] = −0.915; 95% confidence interval [CI] = −1.182 to −0.648; I² = 82.0%; p < 0.001) and depression (SMD = −0.752; 95% CI = −1.034 to −0.470; I² = 81.4%; p < 0.001). Traditional Chinese ethnic sports are notably effective. Interventions under 3 weeks best reduce depression, while 3 ≤ 7 weeks optimally reduce anxiety. Sessions ≤5 times weekly, with 30 ≤ 60 min for anxiety and >60 min for depression, yield the best outcomes. These results highlight the specific effectiveness of physical activity in alleviating anxiety and depression in COVID-19 patients.

Sports tourism has emerged as a popular means of relaxation and psychological enrichment. This study explores the influence of the sports tourism field on tourists’ flow experience, with a focus on the mediating role of tourism involvement and the moderating role of personality traits. Data were collected via questionnaires at several representative sports tourism demonstration sites in China, yielding 454 valid responses. The results revealed that the sports tourism field significantly enhances tourists’ flow experience, and that tourism involvement partially mediates this relationship. Furthermore, personality traits—particularly extroversion—moderate the effect of the tourism field on flow experience, amplifying its impact. The findings offer theoretical insights and practical implications for optimizing destination design and enriching tourists’ immersive experiences in sports tourism.