A: You do the X Reps when you can’t get any more full reps—we call that nervous system exhaustion or fatigue. On some exercises X Reps may not be possible, in which case you should do a static hold at the max-force point, or rest for six seconds and then perform as many X Reps as you can. That’s a new X/Pause technique we’ve found very effective. We’re using that during our peaking phase this year, and so far it looks very promising—new mass and detail!