Table 3.

Moderator analysis

Moderator	Outcome	Hedges’g (95% CI)	No. of studies	Between group comparison: Q (df)
Sex of participants	Squat jump	Males 0.836** (0.497–1.175)	9	7.080 (1)**
		Females 0.207 (− 0.108–0.522)	1
Sex of training group	Squat jump	Males 0.836** (0.497–1.175)	9	7.080 (1)**
		Mixed 0.207 (− 0.108–0.522)	1
Sport status	Squat jump	Sport 0.949*** (0.585–1.759)	7	8.891 (1)**
		Not sport 0.251 (− 0.029–0.530)	3
	Standing long jump	Sport 1.658 *** (0.752–2.564)	1	9.107 (1) **
		Not sport 0.227* (0.020–0.433)	13
Type of control	Standing long jump	No strength 0.227*(0.020–0.433)	13	9.107 (1)**
		Sport only 1.658**(0.752–2.564)	1
Quality score	Sprint	1 (strong) = 0.481 (− 0.306–1.268)	1	12.575 (2)**
		2 (moderate) = − 0.657*(−1.207–0.107)	1
		3 (weak) = 0.418** (0.173–0.663)	9

*P < 0.05, **P < 0.01, ***P < 0.001