[Retracted] Physical Exercise Improves Academic Performance: Based on CNKI Meta-Analysis Evidence

Table 1

Meta-analysis data collation.

Author	Year	Sampling method	Sample size	Grade	Physical exercise intervention duration	Exercise form	Specific physical exercise items
Ni Qi	2018	Convenience sampling	CG:39IG (1):41IG (2):36	Grade five	IG (1): 3 times/week for 6 weeks; IG (2): 3 times/week for 12 weeks	Classroom exercise	Medium-intensity basketball and synchronized rope skipping combination
Zhou Banglun	2017	Convenience sampling	CG:48IG (1):50IG (2):51IG (3):51	Grade three	12 weeks	Classroom exercise	Physical education class of varying intensity
Sang Hongkun	2017	Convenience sampling	CG:40IG (1):43IG (2):43	Grade one	Three times/week for 10 weeks	Classroom exercise	Physical education class of varying intensity
Yan Yun	2019	Convenience sampling	CG:39IG (1):40IG (2):43	Grade one	12 weeks	Classroom exercise	Physical education class of varying intensity
Zhu Lin	2020	Convenience sampling	CG:31IG(1):31IG(2):31	Grade five	12 weeks	Classroom exercise	Physical education class of varying intensity
Fan Yarong	2016	Convenience sampling	CG:49IG (1):50IG (2):51IG (3):50IG (4):50	Grade two	3 times/week for 8 weeks	Classroom exercise	Athletics, basketball, and table tennis
Huang Lingling	2016	Convenience sampling	CG:37IG (1):33IG (2):39IG (3):34	Grade one	2 times/week for 8 weeks	Classroom exercise	Basketball project
Yang Dan	2017	Convenience sampling	CG:30IG (1):30	Grades one and two	Ten weeks	Extracurricular training	Cheerleading
Yu Tingting	2016	Convenience sampling	CG:22IG (1):18IG (2):29	Grade six	Ten weeks	Classroom exercise	Basketball
Zhao Yufeng	2016	Convenience sampling	CG (1):12IG (1):12; CG (1):7IG (1):7; CG (1):6IG (1):6; CG (1):7IG (1):7	Grades one, four, five, and six	Six times/week and 15 weeks/semester for 270 weeks	Classroom exercise and extracurricular training	Volleyball
Zhang Peipei	2016	Convenience sampling	CG:40IG (1):37	Grade five	2 times/week for 8 weeks	Classroom exercise	Soft bar softball
Liu Si-Liang	2017	Convenience sampling	CG:41IG (1):44IG (2):44	Grade one	Three times/week for 10 weeks	Classroom exercise	Physical education class of varying intensity
CAI Yaohui	2020	Convenience sampling	CG:24IG (1):12IG (2):12	Senior class	Nine weeks	Classroom exercise	Table tennis

Note: CG: control group (control group); IG: intervention group (intervention group).