The psychological role of physical activity is an important knowledge to exercise psychology. Physical activity has a certain role in promoting mental state, which can promote positive emotions and slow down negative emotions. It can keep people happy and maintain an optimistic attitude. However, in recent years, research on the overall effect of physical activity on mental states has rarely appeared in my country's achievements. Therefore, this article mainly studies the relationship between college students' physical activities and unhealthy mental states. This paper adopts research methods such as literature method, experimental argumentation method, mathematical statistics method and comparative analysis method. This article analyzes the relationship between the basic physical activities of 500 college students and their unhealthy psychological conditions. The results show that during effective physical activity, students' various functional states fluctuate with changes in exercise intensity and time. Physical activity has no decisive effect on mental state. Although physical activity is largely positively correlated with mentality, the amount of physical activity can promote the improvement of negative emotions to a certain extent, but the impact of positive emotions is not as obvious as that of negative emotions. The higher the physical activity index of college students, the better their mental health status, interpersonal relationship status and emotional status. On the contrary, the less physical activity of college students, the more obvious the unhealthy mental state.

体育活动的心理作用是锻炼心理学的重要知识。体育活动对精神状态有一定的促进作用，可以促进积极情绪，减缓消极情绪。它可以使人保持快乐并保持乐观的态度。但近年来，我国的成果中很少出现关于体育活动对精神状态整体影响的研究。因此，本文主要研究大学生体育活动与不良心理状态的关系。本文采用文献法、实验论证法、数理统计法、比较分析法等研究方法。本文分析了500名大学生基本体育活动与不良心理状况的关系。结果表明，在有效的体育活动中，学生的各种功能状态随着运动强度和时间的变化而波动。体力活动对精神状态没有决定性的影响。虽然体力活动在很大程度上与心态呈正相关，但体力活动的量在一定程度上可以促进消极情绪的改善，但积极情绪的影响不如消极情绪明显。大学生身体活动指数越高，其心理健康状况、人际关系状况和情绪状况越好。相反，大学生的体育活动越少，