Table 3.

Summary of meta-analysis results

Outcome measure	SMD (95% CI)	Z value	p value	I2 (%)
Leg press 1RMa	0.296	1.800	0.072	11.4
Leg press 1RMb	0.266	1.621	0.105	28.2
Knee extension 1RMa	0.523	2.662	0.008*	0.0
Knee extension 1RMb	0.286	1.477	0.140	0.0
Leg press powera	0.130	0.799	0.425	0.0
Leg press powerb	0.065	0.395	0.693	0.0
Knee extension powera	0.016	0.085	0.932	40.3
Knee extension powerb	− 0.134	− 0.693	0.488	0.0

1RM one-repetition maximum, SMD standardized mean difference, I² heterogeneity

^aLow- (20–40%1RM) versus high-intensity (70–80% of 1RM) (comparison using the group training at 20% of 1RM from study by De Vos et al. [27])

^blow-to-moderate- (40–50%1RM) versus High-intensity (70–80% of 1RM) (comparison using the group training at 50% of 1RM from study by De Vos et al. [27])