AUTHOR=Li Na , Ren Kexin , Tao Yuan TITLE=The joint effects of sleep duration and exercise habit on all-cause mortality among Chinese older adult: a national community-based cohort study JOURNAL=Frontiers in Public Health VOLUME=Volume 13 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2025.1538513 DOI=10.3389/fpubh.2025.1538513 ISSN=2296-2565