i've been doing full body workouts every other day for a couple of months and it takes me about an hour and 20 minutes to get through the routine. while this functions ok, i want to try splitting up the workout, so legs/lower back (i say lower back because of deadlifts) on day one, probably around 14 sets , and upper body on day 2, probably around 18 sets. hopefully this will allow me to lift as powerfully as possible, because sometimes it's difficult to keep up one's energy up during an 80 minute lifting spree. the risk is that it would be overtraining. thoughts?