The impact of 24-h movement behaviors on college students' physical fitness and its isotemporal substitution benefits: a compositional data analysis approach. - Li, Rongxuan; Cui, Di; Fan, Qingqing; Zhao, Le; Xia, Ziyao; Zuo, Tianer; Qiu, Ye; Jiang, Qing; Huo, Jiasheng; Wang, Zuoliang (BMC Public Health, 2025)