My weakest body part, by a country mile, are my shoulders (esp. front and medial). Even while I've inched my way up to a 230 max bench, I struggle, somewhat unbelievably, with just 95 lb. seated BB military presses, and seated shoulder presses with 40 lb. dumbells have me failing at 6 - 8 reps.
So it seemed that Perfect-10 high-volume training specializing on my shoulders was a pretty good prescription...only thing I worried about was overtraining them, since Perfect-10 isn't its own program, but simply an add-on to whatever program you happen to be doing. Since your shoulders are activated in nearly every back or chest movement to begin with, I was just wondering whether the fact that my regular program + Perfect 10 training would essentially have me working my shoulders in some capacity 7 - 10 times / week for over a month should be of concern.