The study of the association between exercise motivation and cardiorespiratory fitness in young students: a systematic review and meta-analysis - Zhou, Fangbing; Wang, Wenlei; Nie, Yuyang; Shao, Chunxue; Ma, Wenxue; Qiu, Wentao; Qu, Guofeng; Gao, Jinchao; Liu, Cong (Frontiers in Psychology, 2025)