I've read in a few places on the forum that lifting twice a day is the optimum approach to HST. Why is this so ? I'm considering moving to this split system (mostly because I have limited amounts of contiguous exercise time available) and was curious. Would I increase the number of sets (total) this way ? Right now I am in my second cycle, and am doing 12-16 sets, full body, compound exercises. Thanks for any and all help ! Richard.