AUTHOR=Zhang Hongyang , Liu Hao , Gong Meiting , Ye Xianglin , Wang Peng , Li Meiling , Yang Haixia , Pei Haifeng TITLE=Analysis of changes in heart rate variability after prolonged ultra-high plateau residence in young healthy population: a cross-sectional study JOURNAL=Frontiers in Physiology VOLUME=Volume 16 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2025.1529398 DOI=10.3389/fphys.2025.1529398 ISSN=1664-042X