This isn't a "Is 3 or 4 sets better?" question, like the title may have made it seem. Below should explain better... I do 4 sets per exercise, but a lot of the time I find that even if I manage to get all the required reps in the first 3 sets, I can rarely get the same amount in the 4th set due to accumulated fatigue. I've had periods where I've been stuck at a certain weight for weeks due to this. So I've been thinking... Would it be best to just stick it out and keep trying to get the required reps in the 4th set, or should I just base my progression off the first 3 sets, but still do a 4th anyway? I love using 4 sets and feel it's the perfect amount for me, but the progression issue keeps cropping up with this, whereas it seems easier to get all the required reps when only basing it off the first 3 sets. I assume it's because by the 4th set I'm fully burnt out, whereas even though I'm quite fatigued by the 3rd set I can often still give enough to get the required reps. It's not that I'm looking for the easy way out, as I'm more than willing to put the effort in, but if basing progression off the 4th set is gonna have me reaching a stalemate for ages on end, it's THAT I'm concerned about. Not got an issue whatsoever with just sticking it out though and to keep trying, if that's gonna be the best option. Thanks.