This workout is one Doug Young prescribed for beginners and is supposed to build strength and size fairly equally. But I don’t understand the rep scheme as it says do 3 sets of 6 and then a 4th set of as many reps as possible using the same weight; but that’s basically 4 sets of 6 isn’t it? And there’s hardly any difference in 5 rep max and 6 rep max is there?

Then for squats and deadlifts you do 5/4/3/2/1 so add weight every set or every other set. Its harder than than 1 rep less if you add 5lbs (2x 1.25kg) so do you add weight on the third set and the fifth set? Why doesn’t this rep scheme also apply for bench as that’s also a powerlift?