it's all over the internet now, that different loads cause the same hypertrophy. So 6Rm is pretty much the same as 12RM. That led me to think, why do rep blocks of increasing loads if all are pretty much equal.... then, in an email to a friend (we were discussing this) I had a thought... HST doesn't say 5RM is better than 10RM, it says 5RM is better than 10RM AFTER you have adapted to 10RM. This sounds trivial on the surface, but I think might be a significant point that many might not catch on to. Take two groups of people, have one group do 10Rm another 5RM, and sure, they both get a good new significant stimulus and both grow about the same. But HST isn't about the first few weeks, it's about KEEPING the stimulus going. what happens when the 10RM people stall? HST principles would say, move to a heavier RM, now you can continue to stimulate, that's the key point in Bryan's principles. Not that heavier is better 'ala cart', heavier is better AFTER less heavy loses it's stimulating power.