AUTHOR=Shan Dan , Yang Meina , Zhou Kunyan TITLE=Gender-specific dual effects of physical activity on depression and mortality: a nine-year cohort study in Chinese adults aged 45 and above JOURNAL=Frontiers in Public Health VOLUME=13 YEAR=2025 URL=https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2025.1510044 DOI=10.3389/fpubh.2025.1510044 ISSN=2296-2565