This study found that using rest-pause sets increased muscle activation more so than traditional sets. Greater muscle activation is correlated with increases in muscle size (Wakahara, et. al. 2012) so rest-pause sets might help increase gains. Try rest-pause sets by performing a typical set of 6-10 reps, rest for about 15-20 seconds, then perform more reps to failure. You can even do multiple pauses in a set for maximum fatigue!
