Stress events and stress symptoms in Chinese secondary school students: gender and academic year characteristics of the relationship.

"Conflict of interest The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest."

"The author(s) declare financial support was received for the research, authorship, and/or publication of this article. General program of Education of the National Social Science Fund of China: Research on sports regulation mechanism and intervention scheme of middle school students’ psychological pressure (BLA210215). General program of Jiangsu Province Social Science Found of China: Research on high-quality development of primary and secondary school sports under the background of “Double Reduction.” (22TYB008). Program of Social Science Found in Nantong, Jiangsu province, China: Research on social support system based on adolescents’ mental health service demands (2023BNT025)."