Agree with O&G on this. Those gains are not that good. You could do that on a traditional training routing (1 muscle group/week). The vast majority of HSTers here, myself included, have had tremendous success. Here`s my take. 1)What`s his diet like. I`d bet plenty that he`s not getting enough protein and/or overall calories. 2)There`s no mention of his strength progress and I`d venture that he hasn`t increased that much in his rm`s. He might benefit from a cluster style HST so he can increase the weight. I`d also be curious to see what the weight progressions he uses are. Presuming 2 is correct, could this be a kind of long term RBE? By that I mean that he would see initial gains due to SD but only slightly because the rm progression just isn`t there.