AUTHOR=Men Jie , Zhao Chengrui , Xiang Chenmin , Zhu Guoyu , Yu Zhengyang , Wang Pengbo , Wu Simin , Zhang Yuxi , Li Yishan , Wang Liuliu , Gong Xueyan , Yang Xiang , Zou Shuangling , Ma Jia , Cui Chenglong , Li Hao , Ma Xuedi , Wu Wenjie , Wang Yaoming TITLE=Effects of high-intensity interval training on physical morphology, cardiopulmonary function, and metabolic indicators in older adults: a systematic review and meta-analysis JOURNAL=Frontiers in Endocrinology VOLUME=16 YEAR=2025 URL=https://www.frontiersin.org/journals/endocrinology/articles/10.3389/fendo.2025.1526991 DOI=10.3389/fendo.2025.1526991 ISSN=1664-2392