Long-term associations between the stability of physical activity trajectories and depressive symptom trajectories among middle-aged and older adults: A multi-trajectory modeling analysis using China Health and Retirement Longitudinal Study data

J Affect Disord. 2025 Oct 30:120553. doi: 10.1016/j.jad.2025.120553. Online ahead of print. ABSTRACT BACKGROUND: Although the positive effects of physical activity on depressive symptoms are well established, research on the dynamic relationship between long-term...