Table 5.

Changes in standing long jump (SLJ), squat jump (SJ) and counter movement jump (CMJ), as well as in drop jump (DJ) for length, height, contact time, and reactive strength index (RSI) in group S (strength training) and S+E (strength training with superimposed WB-EMS) during pre-, post-, and retests.

	Parameter	Group	Pretest	Posttest	Pre–Post		Retest	Pre–Re		ANOVA p (${\mathrm{\eta }}_{\mathrm{p}}^2$)
					% Delta	SDM		% Delta	SDM	Time	Group	Time∗ Group
SLJ	Length	S+E	148.82 17.13	159.30 14.67	+7.0∗	0.66	158.64 13.24	+6.6∗	0.64	<0.001 (0.574)	0.333 (0.047)	0.145 (0.092)
	(cm)	S	155.55 8.78	161.55 14.71	+3.9∗	0.50	166.64 13.91	+7.1∗	0.95
SJ	Height	S+E	25.25 3.79	27.17 3.59	+7.6	0.52	27.58 4.66	+9.2∗	0.55	<0.001 (0.345)	0.140 (0.106)	0.245 (0.068)
	(cm)	S	28.59 4.03	28.98 4.72	+1.4	0.09	30.46 4.65	+6.5∗	0.43
CMJ	Height	S+E	27.36 3.83	28.89 3.14	+5.6∗	0.44	30.97 4.70	+13.2∗	0.84	<0.001 (0.423)	0.099 (0.130)	0.746 (0.015)
	(cm)	S	30.54 3.89	32.08 4.72	+5.0∗	0.36	33.36 5.05	+9.2∗	0.63
DJ	Height	S+E	25.21 2.66	27.04 3.03	+7.3	0.64	27.53 3.35	+9.2	0.77	0.486 (0.035)	0.241 (0.068)	0.163 (0.087)
	(cm)	S	24.85 4.69	24.60 6.53	−1.0	0.01	24.21 5.34	−1.5	0.04
	Contact Time	S+E	0.177 0.02	0.167 0.01	−5.7	0.63	0.177 0.02	+0.0	0.0	0.001 (0.284)	0.218 (0.075)	0.043 (0.146)
	(s)	S	0.199 0.03	0.176 0.02°	−11.6	0.90	0.178 0.03°	−10.6	0.70
	RSI	S+E	1.46 0.31	1.63 0.24	+11.6∗	0.61	1.59 0.32	+8.9	0.41	0.011 (0.202)	0.149 (0.101)	0.969 (0.002)
		S	1.28 0.32	1.43 0.43∗	+11.7∗	0.40	1.39 0.35	+8.6	0.33

Values are presented as mean ± SD. Moderate to large standardized mean differences (SMD) have been highlighted in bold. Significance level for time effects for both groups to pretest was set at p ≤ 0.05^∗. Significance level for group^∗time interaction effects was set at p ≤ 0.05°.