i am about to switch programs b/c i want to do a 3x8 routine. If my 1rm bench is 90, and i used to bench 80 for 5 reps, i dont know how many i should start out with so that i can do 7-8 reps. I dont know how much weight to lift for all of my lifts as well. I have seen that in many programs they have loading weeks and i dont know what they do or why they do them. can somebody please offer me some information about how to start a loading phase?