So yesterday was chest, which is normally a pre-exhaust type routine for me. But then I saw a video of a woman doing arm curls on a machine. The twist to the exercise was that at the peak of contraction, she would do the concentric portion of the rep,then back and forth a few inches each way, for 3 reps, then the full rep, then the 3 pulses, and so on. I added this to pec deck and cable crossovers. Full rep, and then pulse, a foot apart, then back together 3 times, then the next full rep. Holy moly! Pumped to within an inch of their lives, my pecs were. Never felt that before. I had to back off the weight a bit to make it work, like about 25%, and did 4 sets of 10 each, with dumbbell bench pressing off the floor between them. Damn! try that one and see, it'll kill you.