Table 7.

Tests of the moderating effect of dynamic stretching on the acute effect of explosive power

Adjustment variables	Heterogeneity test		Category	Effect value&95%CI	Two-tailed test		Number of studiesa
	I2	P			Z	P
Stretching time	80.9	0.00	Less than 7min	0.44(-1.64, 2.52)	0.41	0.68	3
			7–10min	2.90(1.07, 4.73)	3.11	0.00	5
			More than 10min	1.40(-0.55, 3.35)	1.41	0.16	4
Average age	75.6	0.00	Less than 21years	1.95(0.20, 3.70)	2.18	0.03	8
			21–25years	1.39(-0.41, 3.20)	1.51	0.13	7
			More than 25years	2.52(-0.26, 5.30)	1.78	0.08	2
Subjects	77.2	0.00	athletes	1.67(0.31, 3.04)	2.40	0.02	10
			gymgoers	2.00(0.15, 3.85)	2.12	0.03	6
Sample size	75.6	0.00	Less than 20 cases	2.11(0.37, 3.84)	2.38	0.02	7
			21–30 cases	1.93(0.28, 3.59)	2.29	0.02	8
			More than 31 cases	0.07(-0.28, 2.23)	0.07	0.95	2
Years	75.6	0.00	2005–2010years	0.77(-0.73, 2.28)	1.01	0.31	7
			2011–2015years	2.53(0.89, 4.18)	3.01	0.003	7
			2016–2021years	1.55(-1.10, 4.21)	1.15	0.25	3
Quality of the literature	75.6	0.00	14–15 scores	0.28(-2.85, 3.40)	0.17	0.862	2
			16–17 scores	1.71(-0.31, 3.73)	1.66	0.10	7
			18–19 scores	2.02(0.47, 3.56)	2.56	0.009	8

^aindicates that there are differences in the classification of some independent samples, resulting in a total number of studies with some moderating variables not equal to the total number of included studies